Most Repeated mcq’s Of Biology || Biology mcq’s

Most Repeated mcqs Of  Biology

Important mcq’s of  Biology

Top mcqs of Biology-Quick Preparation Guide

1. Air spaces in leaf comprises total volume of

(A) 40%

(B) 45%

(C) 50%

(D) 55%

Answer:40%

2. In class crustacea of phylum arthropoda sexes are

(A) separate

(B) hermaphrodite

(C) separate and hermaphrodite both

(D) none of them

Answer:separate

3. First complete seed appears in

(A) cenozoic era

(B) jurassic era

(C) devonian era

(D) carboniferous era

Answer:devonian era

4. Major cause of chlorosis in plants is shortage of

(A) magnesium

(B) sulphur

(C) nitrogen

(D) iron

Answer:iron

5. All are the deformities of skeleton caused by nutritional deficiencies except

(A) osteomalacia

(B) rickets

(C) microcephaly

(D) none of them

Answer:microcephaly

6. Colour blindness is

(A) x-linked recessive trait

(B) y-linked recessive

(C) y-linked dominant

(D) x-linked dominant

Answer:x-linked recessive trait

7. Which of the following is not sex-linked recessive

(A) colour blindness

(B) haemophilia

(C) tfm syndrome

(D) hypophosphatemic ricket

Answer:tfm syndrome

8. Female reproductive cycle is completed in

(A) 27 days

(B) 28 days

(C) 26 days

(D) 29 days

Answer:28 days

9. All are paired facial bones except

(A) maxilla

(B) nasal

(C) lacrimal

(D) mandible

Answer:mandible

10. Which of the following is not an endotherm

(A) bird

(B) mammals

(C) amphibian

(D) insects

Answer:amphibian

11. In bud condition the upper surface of leaf shows more growth than lower surface in

(A) epinasty

(B) hyponasty

(C) nutation

(D) circumnutation

Answer:epinasty

12. Which one of the following is not a neurotransmitter

(A) acetylcholine

(B) histine

(C) adrenaline

(D) serotonin

Answer:histine

13. The maximum speed of nerve impulse recorded in human is

(A) 80 m/s

(B) 100 m/s

(C) 120 m/s

(D) 140 m/s

Answer:120 m/s

14. New cells were formed by division of previously existing living cells, statement given by

(A) Pasteur

(B) Lorenz oken

(C) Robert hooke

(D) Rudolph virchow

Answer:Rudolph virchow

15. Capsid of herpes virus contain number of capsomers

(A) 162

(B) 252

(C) 165

(D) 152

Answer:162

16. Hepatitis A virus is

(A) RNA enveloped

(B) RNA non-enveloped

(C) DNA envelope

(D) DNA non-envelope

Answer:RNA non-enveloped

17. Antibiotic that can cause allergic reactions

(A) tetracycline

(B) streptomycin

(C) penicillin

(D) terramycin

Answer:terramycin

18. Which is used as pollution indicator

(A) kelp

(B) spirogira

(C) oscillatoria

(D) aspergillus

Answer:oscillatoria

19. Which is used to lower blood cholesterol

(A) cyclosporine

(B) lovastatin

(C) ergotine

(D) penicillin

Answer:lovastatin

20. Ringworm and athlete’s foot are superficial fungal infection caused by certain

(A) zygomycota

(B) ascomycota

(C) basidiomycota

(D) deuteromycota

Answer:deuteromycota

21. Paraphyses is a character of class

(A) anthocerotae

(B) hepaticopsida

(C) bryopsida

(D) psilopsida

Answer:bryopsida

22. The family Solanaceae include all except

(A) sweet pea

(B) potato

(C) tobacco

(D) tomato

Answer:s

23. Percentage of photosynthesis carried out by terrestrial plants

(A) 11%

(B) 10%

(C) 20%

(D) 70%

Answer:10%

24. Which thing in the gall bladder precipiatate to form gall stones

(A) bile salts

(B) bile acids

(C) protein

(D) cholesterol

Answer:cholesterol

25. Energy trapped by producers in the ecosystem is

(A) 1%

(B) 99%

(C) 75%

(D) 65%

Answer:1%

26. Phytoplanktons include all except

(A) protista

(B) bacteria

(C) algae

(D) crustaceans

Answer:crustaceans

27.The number of chromosome in mouse is

(A) 20

(B) 26

(C) 40

(D) 32

Answer:40

28. Nicotine causes all of the following effects except

(A) increase blood pressure

(B) increase heart beat

(C) increae digestive mobility

(D) increase the action of acetylcholine

Answer:increase the action of acetylcholine

Answer:

29. Uterus opens into vagina through

(A) cervix

(B) urethra

(C) clitoris

(D) none of these

Answer:cervix

30. The total gestation period is of

(A) 265 days

(B) 275 days

(C) 280 days

(D) 285 days

Answer:280 days

30. The base pairs in DNA structure are far apart at a distance of

(A) 2nm

(B) 0.34nm

(C) 3.4mm

(D) both c and d

Answer:0.34nm

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