biology MCQs – Page 26

Practise multiple-choice questions from biology for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

biology Mcqs

501. Second largest phylum of invertebrates is____________?
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A. Porifera

B. Arthropoda

C. Chordata

D. Mollusca

502. Kangaroo rat most probably would be found in___________?
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A. Tropical rain forest

B. Desert

C. Tundra

D. Grass land

503. Polychaeta have____________?
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A. Palps

B. Eyes

C. All of these

D. Tentacles

504. In life cycle of bacteriophage which step occur after attachment of prophage with the receptor site of the bacterial cell wall_____________?
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A. Lysogeny

B. Penetration

C. Multiplication

D. Absorption

505. Deficiency of which of the following causes chlorosis__________________?
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A. Nitrogen

B. Magnesium

C. Iron

D. Both A and B

506. The size of smallest virus is______________?
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A. 10 nm

B. 20 nm

C. 40 nm

D. 30 nm

507. Which of the following statement is incorrect regarding germ theory of diseases postulated by Robert Koch_____________?
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A. It is possible to recover the organism in pure culture from the experimentally infected animals

B. The pure culture cannot produce the disease when inoculated into susceptible animal however the causative organism isolated from pure culture can do so.

C. The organism can be isolated and grown in pure culture in the laboratories

D. A specific organism can always be found in association with a given disease

508. Complex specialized flagellates living symbiotically in the gut of termites are___________?
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A. Euglena

B. Trypanosoma

C. Trichonymphas

D. Radiolarians

509. Which of the protozoa has a striking resemblance to collar cells in sponges_____________?
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A. Trypanosomoa

B. Zooflagellates

C. Trichonymphas

D. Choanflagellates