Multiple Choice Questions
Life Processes
Practice Questions with Answers
Total 146 questions available
Q. 1
If salivary amylase is lacking in the saliva, which of the following events in the mouth cavity will
not take place properly?
A
Absorption of vitaminsB
Fats breaking down into fatty acids and glycerolC
Starch breaking down into sugarsD
Proteins breaking down into amino acidsClick an option to check your answer
Q. 2
The major heterotrophs spread globally are
A
symbioticsB
saprotrophsC
parasitesD
holozoicsClick an option to check your answer
Q. 3
During cellular respiration one molecule of glucose is first broken down into two molecules of ________.
A
Pyruvic acidB
Lactic acidC
None of the aboveD
Acetic acidClick an option to check your answer
Q. 4
Normal blood pressure (Systolic / Diastoli(c) is
A
180/80 mm of HgB
120/80 mm of HgC
160/80 mm of HgD
120/60 mm of HgClick an option to check your answer
Q. 5
Urine leaves the kidney through :-
A
collecting ductB
ureterC
UrethraD
renal veinClick an option to check your answer
Q. 6
Principal inspiratory muscle is :-
A
AbdominalB
External intercostalC
PhrenicD
Internal intercostalClick an option to check your answer
Q. 7
Autotroph is the other name of
A
algaeB
herbsC
all of theseD
shurbsClick an option to check your answer
Q. 8
The major source of energy on earth is
A
heat energyB
solar energyC
animalsD
autotrophsClick an option to check your answer
Q. 9
Total amount of ATP produce in aerobic respiration
A
no ATPB
38 ATPC
2 ATPD
26 ATPClick an option to check your answer
Q. 10
How many chambers does the human heart comprise?
A
TwoB
FourC
ThreeD
FiveClick an option to check your answer
Q. 11
What is the summary of energy conversion in the process of photosynthesis?
A
Heat energy is converted into mechanical energy.B
Heat energy is converted into chemical energy.C
Light energy is converted into chemical energy.D
Light energy is converted into mechanical energy.Click an option to check your answer
Q. 12
Which nutrient shows the highest percentage of digestion as the food passes through the digestive tract?
A
FatsB
CarbohydratesC
ProteinsClick an option to check your answer
Q. 13
Which one of the following human organ is often called the "graveyard of RBCs" ?
A
SpleenB
LiverC
Gall bladderD
KidneyClick an option to check your answer
Q. 14
What is the function of heart valves?
A
To regulate blood pressureB
To assist in heart contractionC
To allow blood flow in only one directionD
To store bloodClick an option to check your answer
Q. 15
Living being on which parasites resides called as
A
receptorB
anchorageC
hostD
ligandClick an option to check your answer
Q. 16
The food after digestion at molecular level is called as
A
glucoseB
pyruvateC
malateD
starchClick an option to check your answer
Q. 17
Amount of oxygen which is transported by one gram of haemoglobin is :-
A
13.4 mlB
20 mlC
None of theseD
1.34 mlClick an option to check your answer
Q. 18
Based on the graph, which nutrient is digested most efficiently overall?
A
FatsB
ProteinsC
CarbohydratesClick an option to check your answer
Q. 19
The mode of nutrition in mushrooms is
A
autotrophicB
parasiticC
heterotrophicD
holozoicClick an option to check your answer
Q. 20
Cold blooded animals are those animals in which:-
A
body temperature always remains constantB
blood is coldC
the body is cold to touchD
the temperature of the body varies according to the temperature of the surroundingsClick an option to check your answer
Q. 21
Thrombocytes are also called as
A
plasmaB
plateletsC
WBCD
RBCClick an option to check your answer
Q. 22
A few drops of iodine solution were added to rice
water. The solution turned blue-black in colour.
This indicates that rice water contains:
A
Complex proteinsB
StarchC
FatsD
Simple proteinsClick an option to check your answer
Q. 23
Biological catalysts aiding in food breakdown are also referred to as:
A
enzymesB
proteinsC
fatsD
nucleic acidsClick an option to check your answer
Q. 24
What separates the upper and lower chambers of the heart?
A
ValvesB
VentriclesC
SeptumD
AtriaClick an option to check your answer
Q. 25
The given picture depicts a part of:
A
human digestive systemB
mouse digestive systemC
human respiratory systemD
mouse alimentary canalClick an option to check your answer
Q. 26
Villi present on the inner lining of the intestinal wall
A
Secretes hormonesB
Increases the surface area for absorptionC
Decreases the surface area for absorptionD
Secretes enzymes for digestionClick an option to check your answer
Q. 27
Choose the correct statements that describe
arteries.
A
They have thick elastic walls without valves inside, blood flows under high pressure and carry blood away from the heart to different parts of the body.B
They have thick elastic walls, blood flows under low pressure, carry blood from the heart to various organs of the body.C
They have thin walls with valves inside, blood flows under low pressure, carry blood away from the heart to various organs of the body.D
They have thick elastic walls, blood flows under high pressure, collect blood from different organs and bring back to heart.Click an option to check your answer
Q. 28
RBCs are generally destroyed in the liver, while WBCs are destroyed in :-
A
PlasmaB
LymphC
Outside the blood streamD
Inside various cells of bodyClick an option to check your answer
Q. 29
What role do bacteria play in digestion?
A
Breaking down carbohydratesB
Absorbing waterC
Aiding in nutrient transportD
Assisting in the breakdown of food and synthesis of certain vitaminsClick an option to check your answer
Q. 30
On seeing good food our mouth waters. This fluid is actually
A
EnzymeB
HormoneC
WaterD
None of the aboveClick an option to check your answer
Q. 31
What is the primary goal of digestion?
A
Absorption of waterB
Breaking down large food molecules into small, water-soluble moleculesC
Transporting nutrients to the skinD
Storing excess nutrients in the liverClick an option to check your answer
Q. 32
A patient suffering from hepatitis is advised to restrict the intake of fats and proteins and take carbohydrates only because
A
facts and proteins are not digestedB
emulsification of fat and deamination are retardedC
Facts and proteins are complex substances.D
carbohydrates are easy to digestClick an option to check your answer
Q. 33
The heart of a healthy man beats normally per minute
A
NoneB
50-60 timesC
70-80 timesD
90-100 timesClick an option to check your answer
Q. 34
Book lungs are respiratory organs of :-
A
CentipedesB
InsectsC
CrustaceansD
ScorpionClick an option to check your answer
Q. 35
Which of the following converts starch to glucose, proteins to amino acids, and fats to glycerol?
A
PepsinogenB
Bile saltsC
Gastric juiceD
Intestinal juiceClick an option to check your answer
Q. 36
A person is undergoing prolonged fasting, His urine will be found to contain abnormal quantities of
A
glucoseB
fatsC
ketonesD
amino acidsClick an option to check your answer
Q. 37
During respiration exchange of gases takes place in :
A
Alveoli and throatB
Trachea and larynxC
Alveoli of lungsD
Throat and larynxClick an option to check your answer
Q. 38
Digestion functions are managed by the gastric glands present in the stomach wall by secreting the following:
A
hydrochloric acid, pepsin and mucusB
sulphuric acid, pepsin, and mucusC
hydrochloric acid, pepsin, and mucusD
hydrochloric acid, pepsin, and malic acidClick an option to check your answer
Q. 39
Lichen is the example of _____ nutrition.
A
saprotrophismB
parasitismC
symbiotismD
autotrophismClick an option to check your answer
Q. 40
Which of the following is not a 3-carbon molecule?
A
Lactic acidB
PyruvateC
EthanolD
All of the aboveClick an option to check your answer
Q. 41
The breakdown of 6 carbon sugar in cell takes place by
A
glycolysisB
none of theseC
Both (a) and (c)D
kreb cycleClick an option to check your answer
Q. 42
The force exerted by blood against the vessel wall is termed:
A
ventricular pressureB
blood pressureC
atrial pressureD
septal pressureClick an option to check your answer
Q. 43
Choose the function of pancreatic juice from the
following.
A
Trypsin digests proteins and lipase digests carbohydrates.B
Trypsin digests emulsified fats and lipase digests proteins.C
Trypsin and lipase digest fats.D
Trypsin digests proteins and lipase digests emulsified fats.Click an option to check your answer
Q. 44
What are the solid organs involved in digestion?
A
Mouth and oesophagusB
Pancreas, liver, and gallbladderC
Small and large intestinesD
Stomach and anusClick an option to check your answer
Q. 45
Which of the following have thickest wall?
A
Right ventricleB
Left ventricleC
Right auricleD
Left auricleClick an option to check your answer
Q. 46
The xylem in plants are responsible for:
A
transport of waterB
transport of foodC
transport of amino acidsD
transport of oxygenClick an option to check your answer
Q. 47
What are the two main types of conduits involved in plant transportation?
A
Roots and stemsB
Xylem and chlorophyllC
Phloem and stomataD
Xylem and phloemClick an option to check your answer
Q. 48
The backflow of blood inside the heart during contraction will b prevented by
A
Thick muscular walls of ventriclesB
Thin walls of atriaC
Valves in heartD
All of the aboveClick an option to check your answer
Q. 49
Which of the following statements are correct?
(i) Pyurvate can be broken down into ethanol and carbon dioxide by yeast.
(ii) Fermentation takes place in aerobic bacteria.
(iii) Fermentation takes place in mitochondria.
(iv) Fermentation is a form of anaerobic respiration.
(i) Pyurvate can be broken down into ethanol and carbon dioxide by yeast.
(ii) Fermentation takes place in aerobic bacteria.
(iii) Fermentation takes place in mitochondria.
(iv) Fermentation is a form of anaerobic respiration.
A
(i) and (iii)B
(ii) and (iii)C
(ii) and (iv)D
(i) and (iv)Click an option to check your answer
Q. 50
After wound or cut in a body blood coagulates through
A
RBCB
PlateletsC
PlasmaD
WBCClick an option to check your answer
Q. 51
Malpighian tubules remove excretory matter from the
A
haemolymphB
alimentary canalC
oral cavityD
all of theseClick an option to check your answer
Q. 52
During respiration exchange of O2 and CO2 takes place in
A
alveoli of lungsB
larynx and throatC
trachea and lungD
pharynx and larynxClick an option to check your answer
Q. 53
Which of the following components of our food
is digested by an enzyme which is present in
saliva as well as in pancreatic juice?
A
ProteinsB
MineralsC
FatsD
CarbohydratesClick an option to check your answer
Q. 54
Protein, carbohydrate, and fat components of food are fully digested in the:
A
stomachB
esophagusC
small intestineD
large intestineClick an option to check your answer
Q. 55
Which nutrient exhibits the lowest percentage of digestion throughout the digestive tract?
A
FatsB
CarbohydratesC
ProteinsClick an option to check your answer
Q. 56
Right part of the human heart contains-
A
Mixed bloodB
Oxygenated bloodC
No bloodD
Deoxygenated bloodClick an option to check your answer
Q. 57
Which organisms primarily undergo oxygenic photosynthesis?
A
Plants and animalsB
Algae and certain bacteriaC
Cyanobacteria and fungiD
Protozoa and archaeaClick an option to check your answer
Q. 58
Choose the correct statement(s).
A
The trachea is not connected to bronchi.B
From the larynx the air goes to pharynx.C
Oxygen from alveolar air diffuses into blood and CO2 from blood diffuses into alveolar air.D
Alveoli increase the surface area for exchange of gases.Click an option to check your answer
Q. 59
The undigested food is finally removed from the body through
A
anusB
villiC
large intestineD
small intestineClick an option to check your answer
Q. 60
Saprotrophs are called as decomposers because
A
they accumulate the dead & decayB
they catabolize the dead & decayC
they regulate the dead & deccayD
they anabolize the dead & decayClick an option to check your answer
Q. 61
The process of an artificial kidney that is used to remove nitrogenous waste products from blood is called
A
AbsorptionB
FiltrationC
ExcretionD
DialysisClick an option to check your answer
Q. 62
Which of the following is the correct order for the process of nutrition?
A
Digestion, absorption, assimilation, egestionB
Absorption, assimilation, egestion, ingestionC
Digestion, absorption, ingestion, egestionD
Ingestion, digestion, absorption, assimilationClick an option to check your answer
Q. 63
The amount of energy produce in anaerobic respiration is
A
22 ATPB
12 ATPC
222 ATPD
2 ATPClick an option to check your answer
Q. 64
Air bladder or swim bladder in fishes is associated with :-
A
sound productionB
hydrostasisC
gaseous exchangeD
All of the aboveClick an option to check your answer
Q. 65
In normal expiration, the diaphragm is
A
FlattenedB
ArchedC
PerforatedD
None of the aboveClick an option to check your answer
Q. 66
Human heart is :-
A
Four chamberedB
Three chamberedC
Osmoregulatory organD
Excretory organClick an option to check your answer
Q. 67
Heart covering is
A
pericardiumB
visceral membraneC
peritoneumD
pleural membraneClick an option to check your answer
Q. 68
Where are proteins first digested in the alimentary
canal ?
A
MouthB
OesophagusC
StomachD
Small intestineClick an option to check your answer
Q. 69
Which of the following is the correct statement
regarding bile ?
A
Secreted by liver and stored in bile ductB
Secreted by gall bladder and stored in liverC
Secreted by bile duct and stored in liverD
Secreted by liver and stored in gall bladderClick an option to check your answer
Q. 70
William Harvey is credited with the discovery of
A
mechanism of respirationB
blood clottingC
blood circulationD
process of digestionClick an option to check your answer
Q. 71
What does the X-axis of the graph represent?
A
TimeB
Amount of food consumedC
Sequential structure of the digestive tractD
TemperatureClick an option to check your answer
Q. 72
The opening of auricle into ventricle on the right side is guarded by :-
A
Eustachius valveB
Semilunar valvesC
Tricuspid valveD
Bicuspid valveClick an option to check your answer
Q. 73
Through which system are nutrients transported to the body's organs?
A
Circulatory systemB
Respiratory systemC
Skeletal systemD
Endocrine systemClick an option to check your answer
Q. 74
Ptyalin is secreted by :-
A
Digestive glandsB
Salivary glandsC
Brunner's glandsD
Gastric galndsClick an option to check your answer
Q. 75
The final outputs from photosynthesis, to be filled in boxes 4 and 5, are:
A
glucose and oxygenB
oxygen and glucoseC
glucose and carbon dioxideD
energy and oxygenClick an option to check your answer
Q. 76
Outer layer of kidney is
A
pleuraB
none of theseC
medullaD
cortexClick an option to check your answer
Q. 77
Food ingested is processed to generate particles, which are small and uniform in texture through:
A
bitingB
mixing with saliva in the mouthC
lickingD
crushing the food with our teethClick an option to check your answer
Q. 78
In which part of alimentary canal food is finally
digested ?
A
Small intestineB
Mouth cavityC
Large intestineD
StomachClick an option to check your answer
Q. 79
Filteration unit of Nephron is
A
bowman’s capsuleB
glomerulusC
tubular regionD
kidneyClick an option to check your answer
Q. 80
What is the primary purpose of transportation in plants?
A
Transporting oxygen to the rootsB
Distributing nutrients to the stemC
Moving water and nutrients from roots to leavesD
Translocating carbon dioxide from leaves to rootsClick an option to check your answer
Q. 81
The correct path of urine flow in our body is :
A
Kidney → Ureter → Urinary bladder → UrethraB
Urinary bladder → Kidney → Ureter → UrethraC
Kidney → Ureter → Urethra → Urinary bladderD
Kidney Urinary bladder → Urethra → UreterClick an option to check your answer
Q. 82
Blood is ejected into the body when:
A
left ventricle expandsB
left atrium relaxesC
left atrium contractsD
left ventricle contractsClick an option to check your answer
Q. 83
Blood that returns to the heart is rich in:
A
oxygenB
both (a) and (b)C
carbon monoxideD
carbon dioxideClick an option to check your answer
Q. 84
At which point in the digestive tract does the highest percentage of protein digestion occur?
A
BeginningB
MiddleC
EndClick an option to check your answer
Q. 85
In which organ does the first digestion of starch occur in humans?
A
MouthB
Small intestineC
StomachD
Large intestineClick an option to check your answer
Q. 86
Tachycardia is
A
slow hear rateB
normal heart rateC
fast heart rateD
stop heart rateClick an option to check your answer
Q. 87
Which of the following enzymes get mixed with food in our mouth?
A
PepsinB
AmylaseC
TrypsinD
CelluloseClick an option to check your answer
Q. 88
The main function of the ureter is to
A
Take urine from kidneys to urinary bladderB
Filter blood and remove it to urineC
Connect the parts of excretory systemD
Control the pressure of urine in urinary bladderClick an option to check your answer
Q. 89
A student covered a leaf from a destarched plant
with a black paper strip and kept it in the garden
outside his house in fresh air. In the evening, he tested the covered portion of the leaf for the
presence of starch. By doing so the student was
trying to show that:
A
Light is necessary for photosynthesis.B
CO₂ is given out during respiration.C
CO₂ is necessary for photosynthesis.D
Chlorophyll is necessary for photosynthesis.Click an option to check your answer
Q. 90
What is the primary purpose of transportation in plants?
A
Nutrient distributionB
Water absorptionC
Gas exchangeD
Structural supportClick an option to check your answer
Q. 91
The breakdown of pyruvate to give carbon
dioxide, water and energy takes place in :
A
MitochondriaB
ChloroplastC
NucleusD
CytoplasmClick an option to check your answer
Q. 92
The loss of water in the form of vapour from the aerial parts of the plant is known as:
A
respirationB
transpirationC
transportationD
translocationClick an option to check your answer
Q. 93
Bicuspid valve guards the opening in mammals between
A
right atrium and right ventricleB
left atrium and left ventricleC
pulmonary vein and left auricleD
stomach and intestineClick an option to check your answer
Q. 94
What is the main constraint in plant transportation?
A
Sunlight availabilityB
Soil compositionC
Water availabilityD
Temperature fluctuationsClick an option to check your answer
Q. 95
Human being’s nutrition can be categorized as
A
holozoicB
parasiticC
symbioticD
saprotrophicClick an option to check your answer
Q. 96
The kidneys in human beings are a part of the system for
A
ExcretionB
TransportationC
NutritionD
RespirationClick an option to check your answer
Q. 97
In human each kidney has large numbers of filtration units called ___.
A
NeptuneB
NeutronsC
NephronsD
NeuronsClick an option to check your answer
Q. 98
ADH act on
A
collecting duct of testesB
none of the aboveC
loop of HenleD
collecting tubule of kidneyClick an option to check your answer
Q. 99
The correct pathway of blood in circulatory system is
A
Atria → Ventricles → Arteries → VeinsB
Veins → Ventricles → Atria → ArteriesC
Ventricles → Atria → Veins → ArteriesD
Ventricles → Veins → Arteries → AtriaClick an option to check your answer
Q. 100
In which of the following groups of organisms,
food material is broken down outside the body
and absorbed ?
A
Mushroom, green plants, amoebaB
Paramecium, amoeba, cuscutaC
Yeast, mushroom, bread mouldD
Cuscuta, lice, tapewormClick an option to check your answer
Q. 101
Presence of urea in blood is called
A
anuriaB
uraemiaC
haematuriaD
diureaClick an option to check your answer
Q. 102
The opening and closing of stomatal pores
depends upon :
A
TemperatureB
Concentration of carbon dioxide in stomataC
Water in guard cellsD
OxygenClick an option to check your answer
Q. 103
If the pancreatic duct is blocked an hour after one has taken his food, which one of the following will not be affected?
A
Maintenance of normal blood sugar levelB
Carbohydrate digestionC
Neutralisation of chymeD
Breakdown of proteinsClick an option to check your answer
Q. 104
Blood from the superior vena cava flows into
A
Left ventricleB
Right ventricleC
Left atriumD
Right atriumClick an option to check your answer
Q. 105
The matrix of chloroplast is known as :-
A
StromaB
ThylakoidC
LamellaeD
GranaClick an option to check your answer
Q. 106
Structure which prevents the entry of food in the wind pipe is :-
A
GlottisB
EpiglottisC
PharynxD
GulletClick an option to check your answer
Q. 107
Painful breathing is called :-
A
DyspnoeaB
ApnoeaC
HypopnoeaD
EupnoeaClick an option to check your answer
Q. 108
Blood Pressure and heart beat is regulated by
A
insulinB
optic nerveC
growth hormoneD
adrenalineClick an option to check your answer
Q. 109
In human digestive system the enzymes pepsin
and trypsin are secreted respectively by:
A
Pancreas and liverB
Stomach and pancreasC
Stomach and salivary glandsD
Pancreas and gall bladderClick an option to check your answer
Q. 110
The sphincter muscles that help in regulating the exit of food from stomach into the small intestine is
A
Anal sphincterB
Cardiac sphincterC
Pyloric sphincterD
Ileocecal sphincterClick an option to check your answer
Q. 111
Bile juice does not contain any enzyme, but bile salts are important for the digestion and absorption of fats. Why?
A
Bile is alkaline and contains salts which help to emulsify or break the fats (or lipids) present in the food.B
Makes the acidic food coming from the stomach alkaline so that pancreatic enzymes can act on it.C
Bile salts break the fats present in the food into small globules making it easy for the enzymes to act and digest them.D
All of the aboveClick an option to check your answer
Q. 112
Rajib was absent in the class because of muscle pain which he claims to be due to excess physical exercise he had done yesterday. This pain is due to
A
Formation of Hydrochloric acidB
Formation of lactic acidC
Formation of acetic acidD
Formation of Pyruvic acidClick an option to check your answer
Q. 113
The autotrophic mode of nutrition requires :
A
chlorophyllB
sunlightC
all of the aboveD
carbon dioxide and waterClick an option to check your answer
Q. 114
Which is the first enzyme to mix with food in the
digestive tract?
A
PepsinB
CellulaseC
AmylaseD
TrypsinClick an option to check your answer
Q. 115
The mode of nutrition in parasitic organisms is -
A
autotrophicB
both autotrophic and heterotrophicC
heterotrophicD
none of the aboveClick an option to check your answer
Q. 116
Villi present on the inner lining of the intestinal wall
A
Increases the surface area for absorptionB
Secretes enzymes for digestionC
Secretes hormonesD
Decreases the surface area for absorptionClick an option to check your answer
Q. 117
What is the main product of oxygenic photosynthesis?
A
Carbon dioxideB
WaterC
SugarsD
OxygenClick an option to check your answer
Q. 118
Which of the two, atria or ventricles, possesses thicker muscular walls?
A
AtriaB
VentriclesC
SeptumD
Both atria and ventricles have similar wall thicknessClick an option to check your answer
Q. 119
Bacteria are
A
saprotrophicB
all of the theseC
heterotrophicD
autotrophicClick an option to check your answer
Q. 120
During deficiency of oxygen in tissues of human
beings pyruvic acid is converted into lactic acid
in :
A
MitochondriaB
CytoplasmC
Golgi bodyD
ChloroplastClick an option to check your answer
Q. 121
Sulphur bacteria, Nitrogen bacteria are the members opted the nutrition of type
A
chemotrophicB
symbioticC
phototrophicD
saprophyticClick an option to check your answer
Q. 122
When air is blown from mouth into a test tube
containing lime water, the lime water turns milky
due to the presence of:
A
NitrogenB
Water vapourC
OxygenD
Carbon dioxideClick an option to check your answer
Q. 123
Plant transport systems transports:
A
water from leavesB
raw materials to rootsC
synthesized glucose to leavesD
raw materials from rootsClick an option to check your answer
Q. 124
The force that blood exerts against the wall of a vessel is called
A
Diastolic pressureB
Systolic pressureC
None of theseD
Blood pressureClick an option to check your answer
Q. 125
In Photosynthetic process, atmospheric carbon di oxide is _______ to carbohydrates .
A
BurntB
NeutralisedC
oxidisedD
ReducedClick an option to check your answer
Q. 126
What do plants absorb through their roots, completing the picture in box 2?
A
waterB
mineral nutrientsC
airD
chemicalsClick an option to check your answer
Q. 127
What are the two types of photosynthetic processes?
A
Oxygenic and aerobicB
Anaerobic and aerobicC
Oxygenic and anoxygenicD
Aerobic and anaerobicClick an option to check your answer
Q. 128
Which statement below is false?
A
Valves ensure one-way blood flow during atria or ventricle contractions.B
Vertebrates utilize double circulation.C
Deoxygenated blood travels from the body to the upper right chamber.D
Amphibians or many reptiles have three-chambered hearts, but they do not tolerate the mixing of oxygenated and deoxygenated bloodstreams.Click an option to check your answer
Q. 129
What is the function of xylem in plant transportation?
A
Transporting water and minerals from roots to leavesB
Transporting sugars from leaves to rootsC
Transporting gases between leaves and rootsD
Providing structural support to the plantClick an option to check your answer
Q. 130
Which process converts sunlight, carbon dioxide, and water into sugars and oxygen?
A
RespirationB
PhotosynthesisC
FermentationD
DigestionClick an option to check your answer
Q. 131
The power-house of cell is
A
nucleusB
lysosomeC
mitochondriaD
cytoplasmClick an option to check your answer
Q. 132
The enzyme Pepsin is inactive in stomach without the presence of
A
Acetic acidB
Nitric AcidC
Butyric acidD
Hydrochloric acidClick an option to check your answer
Q. 133
An appropriate entry for box 3 shown in the figure is:
A
oxygenB
airC
nitrogenD
carbon dioxideClick an option to check your answer
Q. 134
The pancreatic juice does not contain one of the
following enzymes.
A
LipaseB
TrypsinC
PtyalinD
AmylaseClick an option to check your answer
Q. 135
How do xylem and phloem tissues resemble the circulatory system in humans?
A
They originate from leaves and move down to the rootsB
They are involved in the distribution of gases.C
They extend throughout the plant similar to blood vessels in humD
They are only present in certain parts of the plant.Click an option to check your answer
Q. 136
Bile from the liver is received in which part ofthe
alimentary canal?
A
Large intestineB
Small intestineC
StomachD
OesophagusClick an option to check your answer
Q. 137
What is the name of the pigment that should be filled in the box 1?
A
chloroplastB
chromophyllC
chlorophyllD
chromoplastClick an option to check your answer
Q. 138
The kidneys in human beings are a part of the
system for:
A
TransportationB
ExcretionC
RespirationD
NutritionClick an option to check your answer
Q. 139
When water enters the guard cells the stomata
A
No effectB
OpensC
ClosesD
Open or closesClick an option to check your answer
Q. 140
What is the size of a normal human heart approximately?
A
Size of a walnutB
Size of a tennis ballC
Size of a person's fistD
Size of a golf ballClick an option to check your answer
Q. 141
In humans, chemical digestion is accomplished by enzyme action that begins in the mouth and ends in the:
A
OesophagusB
StomachC
Small IntestineD
Gall bladderClick an option to check your answer
Q. 142
During hibernation, frog respires by :-
A
Partly skin and partly lungsB
Only buccopharyngeal cavityC
Only skinD
Only lungsClick an option to check your answer
Q. 143
What are the upper chambers of the heart called?
A
AtriaB
VentriclesC
SeptumD
ValvesClick an option to check your answer
Q. 144
In the experiment to show that 'CO₂, is released
during respiration', the solution in the test tube
is chemically:
A
KOHB
KCIC
NaOHD
NaClClick an option to check your answer
Q. 145
Excretory product of spider is
A
uric acidB
guanineC
ammoniaD
none of theseClick an option to check your answer
Q. 146
Which type of photosynthesis is most commonly observed in plants, algae, and cyanobacteria?
A
Anaerobic photosynthesisB
Aerobic photosynthesisC
Oxygenic photosynthesisD
Anoxygenic photosynthesisClick an option to check your answer
Master this Topic
Complete all questions to strengthen your understanding