Life Science MCQ Questions Answers Biology Practice Set

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

a) flowering plants

b) gymnosperms plants

c) pteridophytes

d) bryophytes

View Answer
Option – a)

12) Nitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false?

a) By cyanobacteria

b) By electrical discharges in the atmosphere

c) By industrially synthesised fertilizer

d) By denitrification

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Option – d)

13) DNA structure was first described by


b) Nirenberg

c) Lederberg

d) Watson and Crick

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Option – d)

14) Nymph is the name of young one of

a) butterfly

b) beetle

c) housefly

d) cockroach

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Option – d)

15) On which of the following plants did Gregor Mendal perform his classical experiment?

a) Gram

b) Maize

c) Pea

d) Wheat

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Option – c)

16) Night blindness is cause by lack of which vitamin?

a) Vitamin A

b) Vitamin B

c) Vitamin C

d) Vitamin D

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Option – a)

18) Mycobacterium leprae causes leprosy, Corynebacterium diphtheria causes diphtheria and Vibrio comma causes

a) tetanus

b) influenza

c) cholera

d) typhoid

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Option – c)

19) 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)

20) Which is not an example of fungi ?





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Option – d)

21) Bamboo is classified as





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Option – c)

22) Which one among the following is known as ‘animal starch’ ?


b) Glycogen

c) Pectin

d) Chitin

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Option – b)

23) Who discovered the Polio vaccine ?

a)Louis Pasteur

b) Jonas Salk

c)Konrad Zuse

d) Eli Whitney

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Option -b)

24) Oxyreductases, transferases, hydrolases, lyases, isomerases and ligases are all classes of

a) hormones

b) enzymes

c) proteins

d) vitamins

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Option – b)

25) Ozone hole refers to

a) hole in ozone layer

b) decrease in the ozone layer in troposphere

c) decrease in thickness of ozone layer in stratosphere

d) increase in the thickness of ozone layer in troposphere

View Answer
Option – c)