1.
The enzyme responsible for the digestion of proteins in the
small intestine is:
(a) Pepsin
(b) Trypsin
(c) Amylase
(d)
Lipase
Answer: (b) Trypsin
2.
The part where the exchange of gases occurs during respiration
is:
(a) Lungs and larynx
(b) Alveoli and throat
(c) Throat and
lungs
(d) Alveoli and capillaries
Answer: (d) Alveoli and capillaries
3.
The back flow of blood during the pumping of blood by heart is
prevented by:
(a) Walls of ventncles
(b) Walls of atrium
(c) Valves in
heart
(d) Walls between atria and ventricles
Answer: (c) Valves in heart
4.
The process of digestion is completed by:
(a) Intestinal
juice
(b) trypsin
(c) bile juice
(d) pepsin
Answer: (a) Intestinal juice
5. Which of the following are energy foods?
(a) Carbohydrates and fats
(b) Proteins and mineral salts
(c) Vitamins and minerals
(d) Water and
roughage
Answer: a
6. 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
Answer: b
7. The mode of nutrition found in fungi is:
(a) Parasitic nutrition
(b)
Holozoic nutrition
(c) Autotrophic nutrition
(d) Saprotrophic
nutrition
Answer: d
8. Roots of the plants absorb water from the soil through the process of:
(a) diffusion
(b) transpiration
(c) osmosis
(d) None of
these
Answer: c
9. The site of photosynthesis in the cells of a leaf is
(a)
chloroplast
(b) mitochondria
(c) cytoplasm
(d)
protoplasm
Answer: a
10. In amoeba, food is digested in the:
(a) food vacuole
(b)
mitochondria
(c) pseudopodia
(d)
chloroplast
Answer: a
11. Which of the following events in the mouth cavity will be affected if
salivary amylase is lacking in the saliva?
(a) Starch breaking down into
sugars.
(b) Proteins breaking down into amino acids.
(c) Absorption of
vitamins.
(d) Fats breaking down into fatty acids and
glycerol.
Answer: a
12. Which region of the alimentary canal absorbs the digested food?
(a)
Stomach
(b) Small intestine
(c) Large intestine
(d)
Liver
Answer: b
13. The contraction and expansion movement of the walls of the food pipe is
called:
(a) translocation
(b) transpiration
(c) peristaltic
movement
(d) digestion
Answer: c
14. 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)
fats
(b) complex proteins
(c) starch
(d) simple
proteins
Answer: c
15. The exit of unabsorbed food material is regu-lated by
(a) liver
(b)
anus
(c) small intestine
(d) anal
sphincter
Answer: d
16. What are the products obtained by anaerobic respiration in plants?
(a)
Lactic acid + Energy
(b) Carbon dioxide + Water + Energy
(c) Ethanol +
Carbon dioxide + Energy
(d) Pyruvate
Answer: c
17. The breakdown of pyruvate to give carbon di-oxide, water and energy takes
place in
(a) cytoplasm
(b) mitochondria
(c) chloroplast
(d)
nucleus
Answer: b
18. Glycolysis process occurs in which part of the cell?
(a) Cytoplasm
(b) Nucleus
(c) Mitochondria
(d)
Chloroplast
Answer: a
19. 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
Answer: b
20. Name the pores in a leaf through which respi-ratory exchange of gases
takes place.
(a) Lenticels
(b) Vacuoles
(c) Xylem
(d)
Stomata
Answer: d
21. The respiratory pigment in human beings is:
(a) carotene
(b)
chlorophyll
(c) haemoglobin
(d)
mitochondria
Answer: c
22. Which plant tissue transports water and min-erals from the roots to the
leaf?
(a) Xylem
(b) Phloem
(c) Parenchyma
(d)
Collenchyma
Answer: a
23. The movement of food in phloem is called:
(a) transpiration
(b)
translocation
(c) respiration
(d)
evaporation
Answer: b
24. A blood vessel which pumps the blood from the heart to the entire
body:
(a) artery
(b) capillary
(c) Vein
(d)
Haemoglobin
Answer: a
25. Name a circulatory fluid in the human body other than blood.
(a)
Platelets
(b) RBC
(c) Lymph
(d)
Plasma
Answer: c
26. Single circulation, i.e., blood flows through the heart only once during
one cycle of passage through the body, is exhibited by which of the
following:
(a) hyla, rana, draco
(b) whale, dolphin, turtle
(c) labeo,
chameleon, salamander
(d) hippocampus, exocoetus,
anabas
Answer: d
27. Name the tube which connects the kidneys to the urinary bladder.
(a)
Urethra
(b) Nephron
(c) Tubule
(d)
Ureter
Answer: d
28. 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
Answer: a
29. Where is the dirty blood in our body filtered?
(a) Heart
(b)
Lungs
(c) Ureter
(d) Kidneys
Answer: d
30. The procedure used for cleaning the blood of a person by separating urea
from it is called:
(a) osmosis
(b) filtration
(c) dialysis
(d)
double circulation
Answer: c
31. Which is the correct sequence of body parts in the human alimentary
canal?
(a) Mouth → stomach → small intestine → large intestine →
oesophagus
(b) Mouth → oesophagus → stomach → small intestine → large
intestine
(c) Mouth → stomach → oesophagus → smallintestine → large
intestine
(d) Mouth → oesophagus → stomach → large intestine → small
intestine
Answer: b
32. Identify the correct path of urine in the human body.
(a) Kidney →
urinary bladder → urethra → ureter
(b) Urinary bladder → ureter → kidney →
urethra
(c) Kidney → ureter → urethra → urinary bladder
(d) Kidney →
ureter → urinary bladder → urethra
Answer: d
33.
The extracellular fluid released from the capillaries is:
(a) serum
(b) plasma
(c) lymph
(d) mucus
Answer: (c) lymph
34.
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 proteins
(b) simple proteins
(c) fats
(d)
starch
Answer: (d) starch
35.
In which part of the alimentary canal food is finally
digested?
(a) Stomach
(b) Mouth cavity
(c) Large intestine
(d) Small
intestine
Answer: (d) Small intestine
36.
When air is blown from mouth into a test-tube containing lime
water, the lime water turned milky due to the presence of
(a) oxygen
(b)
carbon dioxide
(c) nitrogen
(d) water vapour
Answer: (b) carbon dioxide
37.
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
Answer: (a) Valves in heart
38.
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
Answer: (d) Pisces only
39.
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
Answer: (c) 6CO2 + 12H2O + Chlorophyll + Sunlight → C6H12O6 + 6O2 + 6H2O
40.
Which is the first enzyme to mix with food i the digestive
tract?
(a) Pepsin
(b) Cellulose
(c) Amylase
(d)
Trypsin
Answer: (c) Amylase
41.
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
Answer: (d) conversion of pyruvate to lactic acid
42.
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
Answer: (c) kidney → ureters → urinary bladder → urethra