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Life Process

Total questions: 100

Worksheet time: 54mins

Name
Class
Date
1.

Which of the following is the first site for the exchange of inhaled air?

a)

Blood capillaries of lungs

b)

Alveoli of lungs

c)

Left auricle of the heart

d)

Blood capillaries adjacent to body cells

2.

Lymph does not comprise of

a)

Red Blood Corpuscles

b)

Lymphocytes

c)

Leucocytes

d)

Nitrogenous Waste

3.

Crocodiles have ______ chambered heart.

a)

two

b)

three

c)

four

d)

none of these

4.

An enzyme 'X' that converts starch to simple sugars is also the first enzyme to mix with food in the digestive tract. Identify 'X'

a)

Pepsin

b)

Amylase

c)

Lipase

d)

None of these

5.

Which among of the following substances are reabsorbed in the nephron?

a)

Urea, Uric acid, Amino acid

b)

Glucose, Amino acids, Salts

c)

Glucose, Urea, Creatinine

d)

KCl, Urea, Glucose

6.

How is food transported to the food vacuole of paramecium?

a)

By movement of cilia

b)

By pseudopodia

c)

Food vacuole directly captures the food

d)

By contractile vacuole

7.

The process of obtaining food to meet the energy demands of the body is known as _____.

a)

Excretion

b)

Respiration

c)

Nutrition

d)

Circulation

8.

The process that involves oxidation of food to release energy is known as _____

a)

Breathing

b)

Excretion

c)

Circulation

d)

respiration

9.

what could be the possible explanation for the evolution of a four-chambered heart in mammals as opposed to a two-chambered heart in fishes?

a)

In fishes oxygenation of blood takes place in heart.

b)

Fishes have efficient gills.

c)

Fishes can store more energy than mammals.

d)

Fishes do not require energy to maintain their body temperature.

10.

What happens to the unused carbohydrates produced in the plant body?

a)

Gets broken down and dissipated as heat.

b)

Transported to stem in the form of glycogen.

c)

Expelled from plant body through excretion.

d)

Stored in the form of starch for future use.

11.

Saliva in the mouth converts _______ into _______________.

a)

Proteins, amino acids

b)

glycogen, glucose

c)

starch, maltose

d)

fats, vitamins

12.

Name the tissue in a leaf where plastids are present_____

a)

Endodermis

b)

Epithelial cell

c)

Mesophyll

d)

Mitochondria

13.

Choose the correct function of the given structure.

a)

Gaseous exchange

b)

Absorbs salt and water.

c)

Reabsorption of urea and uric acid

d)

none of these

14.

Name the tissue responsible for the transportation of sugar and amino acids in plants.

a)

Xylem

b)

Stomata

c)

root hairs

d)

Phloem

15.

Identify the structure.

a)

Nephron

b)

Alveolar sac

c)

Alimentary canal

d)

None of these

16.

Assertion: Lungs become empty after the forceful expiration.

Reason: The forcefully exhaled air is called the residual volume of air.

a)

Both A and R are true and R is the correct explanation of the A.

b)

Both A and R are true but R is not the correct explanation of the A.

c)

A is true but R is false.

d)

Both A and R are false.

17.

A: The length of the small intestine in cows is longer than in tigers.

R: Cellulose digestion takes lesser time than the digestion of flesh.

a)

Both A and R are true and R is the correct explanation of the A.

b)

Both A and R are true but R is not the correct explanation of the A.

c)

A is true but R is false.


d)

A is false but R is true.

18.

A: Walls of the intestine have numerous villi.

R: These villi increase the surface area of digestion.

a)

Both A and R are true but R is the correct explanation of the A.

b)

Both A and R are true but R is not the correct explanation of the A.

c)

A is true but R is false.

d)

A is false but R is true.

19.

A: Lipase helps in the emulsification of fats.

R: Lipase hydrolyses fats and oils.

a)

Both A and R are true and R is the correct explanation of the A.


b)

Both A and R are true and R is not the correct explanation of the A.


c)

A is true but R is false.

d)

A is false but R is true,

20.

A: When air is passed through lime water, it turns milky.

R: air contains 78% nitrogen and 21% oxygen.


a)

Both A and R are true and R is the correct explanation of the A.

b)

Both A and R are true and R is not the correct explanation of the A.

c)

A is true but R is false.

d)

A is false but R is true.

21.

The autotrophic mode of nutrition requires

a)

Carbon dioxide and water

b)

Sunlight

c)

Chlorophyll

d)

All of the above

22.

The breakdown of pyruvate to give carbon dioxide water and energy takes place in

a)

Cytoplasm

b)

Mitochondria

c)

chloroplast

d)

Nucleus

23.

Saliva contains an enzyme for digestion of starch

a)

Amylase

b)

Lipase

c)

Trypsin

d)

Glycerol

24.

Energy transformation that takes place in the process of photosynthesis

a)

Solar to chemical

b)

Solar to electrical

c)

Solar to mechanical

d)

Nanak Dev

25.

Give an example of an organism whose digestion is intracellular

a)

Plant

b)

Amoeba

c)

Tiger

d)

Insect

26.

Which is the largest gland in human body

a)

Pancreas

b)

Liver

c)

Adrenal

d)

Pituitary

27.

What protects the inner lining of stomach from hydrochloric acid

a)

Carbon dioxide

b)

Protein

c)

Mucus

d)

Fat layer

28.

The maintenance of optimum concentration of water and salts in the body fluids

a)

Ingestion

b)

Respiration

c)

Excretion

d)

Osmoregulation

29.

Which one is the structural and functional unit of kidney

a)

Nexon

b)

Nephron

c)

Ureter

d)

Urethra

30.

In this type of nutrition solid and complex organic food is directly taken into the body

a)

Saprophytic nutrition

b)

Parasitic nutrition

c)

Holozoic nutrition

d)

None of the above

31.

What is correct about bile juice in human digestion

a)

Bile does not contain any enzyme

b)

Bile is alkaline

c)

Bile salt is present which helps to Tu emulsify the fat

d)

All of the above

32.

Which one is correct about artery

a)

Thin walled

b)

carries blood to from the Heart to other parts of the body

c)

Situated just under the skin

d)

None of the above

33.

Pulmonary veins contain

a)

Oxygenated blood

b)

Deoxygenated blood

c)

Both oxygenated and deoxygenated blood

d)

All of the above

34.

Why do the walls of trachea not collapse when there is less air in it?

a)

Supported by rings of cartilage

b)

Supported by Rib cage

c)

No air is left the question is wrong

d)

Because of strong muscles

35.

Why does lack of oxygen in muscles often lead to cramps among cricketers?

a)

Formation of lactic acid during lack of oxygen

b)

Conversion of pyruvate to ethanol and CO2 in absence of oxygen

c)

Due to formation of CO2 and H2O in mitochondria

d)

None of the above

36.

How many pairs of salivary glands are found in

humans?

a)

two

b)

three

c)

six

d)

four

37.

Blood vessel carry blood from lungs to heart through:

a)

Pulmonary artery

b)

Pulmonary vein

c)

Coronory artery

d)

None of these

38.

From which structure, the free oxygen gas produced

during photosynthesis is released?

a)

Epidermis

b)

Stomata

c)

Cortex

d)

Guard cell

39.

Villi present on the internal wall of intestine help in

the

a)

emulsification of fats

b)

breakdown of proteins

c)

absorption of digested food

d)

digestion of carbohydrates

40.

During vigorous physical exercise, lactic acid is formed

from glucose inside the muscle cells because

a)

there is lack of oxygen

b)

there is lack of water

c)

there is excess of carbon dioxide

d)

none of the above

41.

Which of the following is responsible for the transport

of water and minerals from roots to aerial parts of the

plant?

a)

Xylem

b)

Phloem

c)

cortex

d)

Both (a) and (b)

42.

Which chambers of human heart contain oxygenated

blood?

a)

Left atrium and left ventricle

b)

Left atrium and right ventricle

c)

Right atrium and left ventricle

d)

Right atrium and right ventricle

43.

The process of conversion of glucose into pyruvic acid

occurs in

a)

mitochondria

b)

Cytoplasm

c)

outside the cell

d)

chloroplast

44.

The breakdown of pyruvate to give carbon-di-oxide,

water and energy takes place in:

a)

cytoplasm

b)

mitochondria

c)

chloroplast

d)

nucleus

45.

Digestion of starch starts from:

a)

Stomach

b)

Intestine

c)

Oesophagus

d)

Mouth

46.

The process of transpiration in plants helps in:

a)

Opening of stomata

b)

Absorption of CO2 from atmosphere

c)

Upward conduction of water and minerals

d)

Absorption of O2 from atmosphere

47.

What is the mode of nutrition in fungi?

a)

Autotrophic

b)

Heterotrophic

c)

Saprophytic

d)

Parasitic

48.

Which cell organelle is involved in breakdown of

glucose to produce energy for metabolic activities?

a)

Mitochondria

b)

Chloroplast

c)

Endoplasmic reticulum

d)

Golgi body

49.

What is the final product of photosynthesis?

a)

Protein

b)

Fat

c)

Starch

d)

Mineral salt

50.

Instrument used to measure blood pressure is

a)

barometer

b)

thermometer

c)

anemometer

d)

sphygmomanometer

51.

The site of photosynthesis in plant cell is

a)

mitochondria

b)

chloroplast

c)

ribosomes

d)

endoplasmic reticulum

52.

which part of the alimentary canal will absorb the digested food

a)

stomach

b)

large intestine

c)

small intestine

d)

anus

53.

When a few drops of iodine solution are added to rice water, the solution turns blue- black in colour. This indicates that rice water contains

a)

starch

b)

proteins

c)

fat

d)

amino acids

54.

The breakdown of pyruvate to give carbon di-oxide, water and energy takes place in

a)

cytoplasm

b)

chloroplast

c)

nucleus

d)

mitochondria

55.

The respiratory pigment in human beings is:

a)

carotene

b)

chlorophyll

c)

haemoglobin

d)

mitochondria

56.

The movement of food in phloem is called:

a)

respiration

b)

translocation

c)

evaporation

d)

transpiration

57.

Name a circulatory fluid in the human body other than blood.

a)

Platelets

b)

RBC

c)

Plasma

d)

Lymph

58.

Which part of nephron allows the selective reabsorption of useful substances like glucose, amino acids, salts and water into the blood capillaries?

a)

Tubule

b)

Glomerulus

c)

Bowman’s capsule

d)

Ureter

59.

The procedure used for cleaning the blood of a person by separating urea from it is called:

(a)  

60.

Name the substances whose build up in the muscles during vigorous physical exercise may cause cramps?

a)

Ethanol + Carbon dioxide + Energy

b)

Lactic acid + Energy

c)

Carbon dioxide + Water + Energy

d)

Pyruvate

61.

………. transports products of photosynthesis from the leaves to other parts of the plant.

(a)  

62.

Temporary finger like extensions on amoeba are called

(a)  

63.

Bile juice is secreted by


a)

Stomach

b)

Pancreas

c)

Small intestine

d)

Liver

64.

Choose the function of pancreatic juice from 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

65.

Which respiration is much efficient?

a)

aerobic

b)

anaerobic

c)

both are equal

d)

none

66.

During deficiency of oxygen in tissues of human beings, pyruvic acid is converted into lactic acid in the

a)

cytoplasm

b)

chloroplast

c)

mitochondria

d)

golgi body

67.

Choose the correct path of urine in our body

a)

kidney → ureter → urethra → urinary bladder

b)

kidney → urinary bladder → urethra → ureter

c)

kidney → ureters → urinary bladder → urethra

d)

urinary bladder → kidney → ureter → urethra

68.

Lack of oxygen in muscles often leads to cramps among cricketers. This results due to

a)

conversion of pyruvate to ethanol

b)

conversion of pyruvate to glucose

c)

non conversion of glucose to pyruvate

d)

conversion of pyruvate to lactic acid

69.

Which of the following statement(s) is (are) correct?

(i) Pyruvate can be converted 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 (iv)

c)

(i) and (iv)

d)

(ii) and (iii)

70.

Which is the first enzyme to mix with food in the digestive tract?

a)

Pepsin

b)

Cellulase

c)

Amylase

d)

Trypsin

71.

Choose the forms in which most plants absorb nitrogen

i) Proteins

(ii) Nitrates and Nitrites

(iii) Urea

(iv) Atmospheric nitrogen

a)

(i) and (ii)

b)

(ii) and (iii)

c)

(iii) and (iv)

d)

(i) and (iv)

72.

Choose the event that does not occur in photosynthesis

a)

Absorption of light energy by chlorophyll

b)

Reduction of carbon dioxide to carbohydrates

c)

Oxidation of carbon to carbon dioxide

d)

Conversion of light energy to chemical energy

73.

Which of the following equations is the summary of

photosynthesis?

a)

6CO2 + 12H2O → C6H12O6 + 6O2+ 6H2O

b)

6CO2 + H2O + Sunlight→ C6H12O6 + O2+ 6H2O

c)

6CO2 + 12H2O + Chlorophyll + Sunlight→ C6H12O6 + 6O2+ 6H2O

d)

6CO2 + 12H2O + Chlorophyll + Sunlight→ C6H12O6 + 6CO2+ 6H2O

74.

The internal (cellular) energy reserve in autotrophs is

a)

Glycogen

b)

Protein

c)

Starch

d)

Fatty acid

75.

Which of the following is an incorrect statement?

a)

Organisms grow with time

b)

Organisms must repair and maintain their structure

c)

Movement of molecules does not take place among cells

d)

Energy is essential for life processes

76.

The blood leaving the tissues becomes richer in

a)

carbon dioxide

b)

water

c)

heamoglobin

d)

oxygen

77.

Oxygen liberated during photosynthesis comes from

a)

water

b)

chlorophyll

c)

carbon dioxide

d)

glucose

78.

The filtration units of kidneys are called

a)

ureter

b)

urethra

c)

neurons

d)

nephrons

79.

In which of the following vertebrate group/groups, heart does not pump oxygenated blood to different parts of the body?

a)

Pisces and amphibians

b)

Amphibians and reptiles

c)

Amphibians only

d)

Pisces only

80.

What prevents backflow of blood inside the heart during

contraction?

a)

Valves in heart

b)

Thick muscular walls of ventricles

c)

Thin walls of atria

d)

All of the above

81.

Assertion (A): In anaerobic respiration, one of the end products is alcohol.

Reason (R) : These is an incomplete breakdown of glucose.

a)

Both A and R are true and R is the correct explanation of A.

b)

Both A and R are true but R is not the correct explanation of A.

c)

A is true but R is false.

d)

A is false but R is true.

82.

Assertion (A) : Carbohydrate digestion mainly takes place in small intestine.

Reason (R) : Pancreatic juice contains the enzyme pancreatic trypsinogen.

a)

Both A and R are true and R is the correct explanation of A.

b)

Both A and R are true but R is not the correct explanation of A.

c)

A is true but R is false.

d)

A is false but R is true.

83.

In which of the following vertebrate group/groups, heart does not pump oxygenated blood to different parts of the body?

a)

Pisces and amphibians

b)

Amphibians and reptiles

c)

Amphibians only

d)

Pisces only

84.

When air is blown from mouth into a test-tube containing lime water, the lime water turned milky due to the presence of (a)  

85.

Which is the correct sequence of parts in human alimentary canal?

a)

Mouth -->stomach --> small intestine -->oesophagus --> large intestine

b)

Mouth --> oesophagus -->stomach -->large intestine -->small intestine

c)

Mouth--> stomach --> oesophagus --> small intestine -->large intestine

d)

Mouth --> oesophagus --> stomach --> small intestine --> large intestine

86.

If salivary amylase is lacking in the saliva, which of the following events in the mouth cavity will be affected?

a)

Proteins breaking down into amino acid

b)

Starch breaking down into sugar

c)

Fats breaking down into fatty acids and sugars.

d)

Absorption of vitamins

87.

Single circulation, i.e. blood flows through the heart only once during one cycle of passage through the body, is exhibited by

a)

Labeo, Chameleon, Salamander

b)

Hippocampus, Exocoetus, Anabas

c)

Hyla, Rana, Draco

d)

Whale, Dolphin, Turtle

88.

The major nitrogenous waste product in human beings is (a)  

89.

During respiration exchange of gases take place in (a)   of lungs

90.

The walls of the small intestine has several finger like projections called (a)   .

91.

In which mode of nutrition an organism de-rives its food from the body of another living organism without killing it?

a)

Saprotrophic nutrition

b)

Parasitic nutrition

c)

Holozoic nutrition

d)

Autotrophic nutrition

92.

In this experiment, how does KOH affect the process pf photosynthesis in the plant kept in bell jar?

a)

Increases water intake and oxygen production

b)

Inhibits CO2 intake by the plant.

c)

Stops the food production in leaves.

d)

Stops photolysis of water.

93.

How is food transported to food vacuole of paramecium?

a)

By movement of cilia

b)

By pseudopodia

c)

Food vacuole directly captures the food

d)

By contractile vacuole.

94.

Which of the following are surrounded by a rich amount of capillaries?

a)

Trachea

b)

Alveoli

c)

Nostril

d)

Bronchi

95.

The process involving oxidation of food to release energy is known as (a)  

96.

Identify the structure shown above:

a)

Arteries

b)

Pharynx

c)

Alveoli

d)

Capillaries

97.

Dysfunction in ______ can affect the quality of life while other life processes are still working as usual.

a)

Respiration

b)

Digestion

c)

Circulation

d)

Excretion

98.

Label the parts of flower

1. ____

2. ____

3. ____

4. ____

5. ____

6. ____

7. ____

8. ____

9. ____

(a)  

99.

Which of the following is false about Ovum?

a)

It is non-motile

b)

It is larger than sperm

c)

It is produced in scrotum

d)

It is the female gamete

100.

Identify the given pathway and label A,B,C and D

a)

Reflex arc, A- Receptor, B- Sensory neuron, C- Motor neuron, D- Relay neuron

b)

Central Nervous System, A- Electrical Impulse, B- Sensory neuron, C- Motor neuron, D- Nerve ending

c)

Peripheral Nervous System, A- Sensory neuron, B- Motor neuron, C- Electrical Impulse, D- Nerve ending

d)

Neuromuscular junction, A- cell body, B- Sensory neuron, C- Motor neuron, D- Axon

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