Life Science MCQ Questions Answers Biology Practice Set

26) Herbicides are used to control ?

a) Fungi

b) Nematodes

c) Weeds

d) Insects

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Option – c)

27) Non-clotting of blood is caused by deficiency of ?

a) Vitamin A

b) Vitamin C

c) Vitamin E

d) Vitamin K

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Option – d)

28) Monotremes are unique mammals because they

a) posses hair

b) give birth to live young

c) secret milk in a pouch

d) lay eggs

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Option – d)

29) One of the following is not a function of bones.

a) Place for muscle attachment

b) Protection of vital organs

c) Secretion of hormones for calcium regulation in blood and bones

d) Production of blood corpuscles

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Option – c)

30) N2 content is kept constant in the biosphere due to

a) N2 fixation

b) industrial pollution

c) nitrogen cycle

d) absorption of N2

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Option – c)

31) Radical vascular bundles are those in which

a) xylem is surrounded by phloem

b) phloem is surrounded by xylem

c) xylem and phloem occur on the same radius

d) xylem and phloem occur on the different radii

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Option – d)

32) Myopia is connected with

a) ears

b) eyes

c) lungs

d) None of these

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Option – b)

33) Wisdom teeth are ?

a)last premolars

b)last molars

c)canines

d)incisors

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Option – b)

34) Which blood group is known as Universal donor ?

a)A+

b)A-

c)AB

d)O

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Option – d)

35) Pulses are a good source of

a) carbohydrates

b) fats

c) proteins

d) vitamins

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Option – c)

36) Plants receive their nutrients mainly from

a) chlorophyll

b) atmosphere

c) light

d) soil

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Option – d)

37) Pine, fir, spruce, cedar, larch and cypress are the famous timber-yielding plants of which several also occur widely in the hilly regions of India. All these belong to

a) angiosperms

b) gymnosperms

c) monocotyledons

d) dicotyledons

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Option – b)

38) Radish is a

a) bulb

b) conn

c) modified root

d) tuber

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Option – c)

39) Our major foods, fibres, spices, fruits and beverage crops are

a) flowering plants

b) gymnosperms plants

c) pteridophytes

d) bryophytes

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Option – a)

40) The largest organ of human body is ?

a)Brain

b) Heart

c) Skin

d) Liver

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Option – c)

41) What is “ALZHEIMER’S” disease ?

a)It affects liver

b) It affects Kidney

c) It affects human immune system

d) It is a disorder of the brain

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Option – d)

41) Plants wilt due to excess of

a) transpiration

b) photosynthesis

c) absorption

d) None of these

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Option – a)

42) Plants hormone that induces cell division is

a) auxins

b) gibberellins

c) kinins

d) domins

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Option – c)

43) Plants receive their nutrients mainly from

a) chlorophyll

b) atmosphere

c) light

d) soil

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Option – d)

44) Which among the following kinds of lenses are used to treat Astigmatism ?

a)Concave Lens

b)Convex Lens

c)Bifocal Lens

d)Cylindrical

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Option – d)

45) Which of has following group of gases contribute to the ‘Green House Effect’ ?

a)Carbon tetrafluoride and Nitrous oxide

b)Carbon monoxide and Sulphur dioxide

c)Ammonia and Ozone

d)Carbon dioxide and Methane

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Option – d)

46) How do marine animals survive in water without air contact ?

a)They do not require any oxygen

b) They take oxygen from water

c) They only produce oxygen in their body

d) They get oxygen from water plants

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Option – a)

47) Photo-oxidation is

a) photorespiration

b) photolysis

c) light and oxygen induced breakdown

d) All of the above

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Option – d)

48) What provides instant energy ?

a)Fat

b)Carbohydrates

c)Protein

d)Vitamin

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Option – b)

49) Potato is a modified form (outgrowth) of:

a) root

b) stem

c) fruit

d) leaf

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Option – b)

50) Plants that grow under average temperature and moisture are called

a) halophytes

b) hydrophytes

c) mesophytes

d) xerophytes

View Answer
Option – c)
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