Biology MCQs

11. In which of the following weeks the heart of human embryo starts beating?
[A] in the first week of its development
[B] in the third week of its development
[C] in the fourth week of its development
[D] in the sixth week of its development

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12. Which one of the following is a useful functional association between fungi and the roots of higher plants?
[A] Biofertilizer
[B] Coralloid root
[C] Lichen
[D] Mycorrhiza

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13. With reference to the blood in a normal person, which one of the following statements is correct?
[A] Compared to arteries, veins are less numerous and hold less of the body’s blood at any given time
[B] Blood cells constitute about 70 per cent of the total volume of the blood
[C] White Blood Cells (WBC) are made by lymph nodes only
[D] The blood has more platelets than WBC

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14. What is the name of the vessel that delivers the nutrient rich blood from the stomach and small intestine to the liver?
[A] Left hepatic artery
[B] Hepatic vein
[C] Right hepatic artery
[D] Hepatic portal vein

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15. Which phylum does the salamander belong to?
[A] Mollusca
[B] Amphibians
[C] Reptiles
[D] Mammals

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16. Which of the following are blue-green algae?
[A] Prokaryotes
[B] Eukaryotes
[C] Both 1 and 2
[D] Neither 1 nor 2

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17. Which of the following is hemoglobin?
[A] Primary structure
[B] Secondary structure
[C] Tertiary structure
[D] Quaternary structure

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18. Which of the following virus has its envelope from the host cell nucleus?
[A] Paramyxoviruses
[B] Retroviruses
[C] Orthomyxoviruses
[D] Herpesviruses

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19. Which one of the following plants has seeds but no flowers and fruits?
[A] Bryophytes
[B] Gymnosperms
[C] Mosses
[D] Pteridophytes

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20. Green algae, red algae and brown algae are common examples of__?
[A] Thallophyta
[B] Bryophyta
[C] Pteridophyta
[D] Gymnosperms

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