Biology MCQs

1. The plant hormone Auxin is basically a ___?
[A] Weak Organic Acid
[B] Weak Inorganic Acid
[C] Weak Organic base
[D] Gaseous compound of carbon

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2. A genetic code specifies how many kinds of amino acids?
[A] 12
[B] 15
[C] 20
[D] 25

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3. Which among the following bacterial cells are found in cubical packets?
[A] Tetracocci
[B] Streptococci
[C] Staphylococci
[D] Sarcinae

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4. Which among the following is essential for both activation and action of thrombin ?
[A] Na+
[B] Cl-
[C] Ca2+
[D] Mg2+

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5. In which of the following, the cellular power plants – Mitochondria are absent ?
[A] Red algae
[B] Green Algae
[C] Bacteria
[D] Brown Algae

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6. Why do birds not experience respiratory issues while flying at high altitudes?
[A] Their lungs are larger relative to body size
[B] They fly inactively at high altitudes
[C] None of the above is correct
[D] Birds possess additional air sacs

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7. Fruits ripen faster when kept in a / an __:
[A] rice container
[B] wheat container
[C] open container
[D] refrigerator

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8. Which one of the following is a useful functional association between fungi and the roots of higher plants?
[A] Mycorrhyza
[B] Lichen
[C] Root Nodules
[D] Cluster roots

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9. Which of the following is the characteristic of water present in coconut?
[A] liquid endocarp
[B] liquid nucellus
[C] liquid mesocarp
[D] degenerated liquid endosperm

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10. Which of the following fruits has its seed outside?
[A] Mango
[B] Banana
[C] Strawberry
[D] Orange

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