biology MCQs – Page 25

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 Review each marked answer and report any item that may be outdated or unclear.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
481. Autotrophic organisms can exist in an exclusively ________________ environment?
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A. Organic

B. Inorganic

C. Terrestrial

D. Wet

482. Deficiency of K+ causes_____________?
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A. Premature death of leaves

B. Stunted growth of roots

C. Stunted growth & strong chlorosis

D. No electron transport chains

483. The resolving power of electric microscope is____________?
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A. 0.2 nm

B. 0.2 mm

C. 0.2 m

D. none of these

484. Bacteriopahage that infect E. coli are called_____________?
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A. S type

B. N type

C. T type

D. M type

485. Attachment of the bacteriophage with the receptor site on the bacterial cell wall involves_______________?
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A. Strong covalent bond between virion and the receptor site.

B. Week chemical unior between them

C. Both A and B depending upon the phage

D. None of these

486. In chlorophytes the main energy stores are__________?
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A. Starch

B. Cellulose

C. Glycogen

D. All of these

487. Which of the following bacteria are thick rigid and spiral______________?
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A. Vibrio

B. Spirochete

C. Spirillum

D. Coccus

488. Which of the following is called black bread mold?
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A. Pilobolus

B. Neurospora

C. Rhizopus

D. Penicillium

489. Which one of the following is different from all the rest regarding the number of cells inits body_______________?
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A. Rusts

B. Molds

C. Yeasts

D. Mushrooms

490. Which of the following statement about eiliates in incorrect_____________?
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A. Contain mainly unicellular organisms.

B. They are even capable of sexual reproduction.

C. Their contractile vacoule is respobsible for water regulation.

D. Diploid nucleus being smaller is responsible for cells metabolism and growth whilepolyploidy nucleus functions in sexual process.
491. Of the following which one is not the characteristic of triploblasts?
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A. All of them have digestive system

B. They may be coelomate pseudocoelomate or acoelomate

C. They are included in grade bilaterian

D. All of them have blood vascular system
492. Hepatic and Pancreatic secretions are also stimulated by a hormone produced by the intestinal mucosa. The hormone is___________?
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A. Secretin

B. Gastrin

C. Creatin

D. Pepsin

493. Oyster mushroom is an example of predator fungi which attack on______________?
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A. Tape worms

B. Pin warms

C. Platehelminthes

D. Round worms
494. Enteron in coelenterates acts as___________?
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A. Transporting cavity

B. Body cavity

C. all of these

D. Digestive cavity

495. Which of the following is responsible for Irish potato famine?
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A. Dinoflagellates

B. Physarum polycephalum

C. Kleps

D. Phytophthora infestans
496. Puccinia commonly destroys______________?
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A. Tomato

B. Wheat

C. Dodder

D. Corn

497. In the Lysogenic cycle the DNA of the bacteriophage__________________?
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A. Goes directly to host ribosomes for translation

B. Attaches to the inner surface of the host membrane

C. Is immediately degraded when enters the host

D. Joins the bacterial chromosomes
498. The Kingdom of recyclers is known as kingdom_____________?
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A. Algae

B. Bacteria

C. Fungi

D. Embryophata

499. Viruses are __________ smaller than bacteria?
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A. 100 1000 times

B. 10 100 times

C. 10 1000 times

D. 1000 10000 times

500. Body is eel like in___________?
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A. Cyclostomata

B. None of these

C. Osteichthyes

D. Chondrichthyes