Biology Questions

Q:

Which of the following enzymes is responsible for RNA synthesis?

A) RNA polymerase B) RNase
C) RNA ligase D) DNA polymerase
 
Answer & Explanation Answer: A) RNA polymerase

Explanation:

The enzyme that is mainly responsible for RNA synthesis is known as RNA polymerase.

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Q:

The hormone that helps plants respond to drought is

A) abscisic acid B) cytokinin
C) gibberellin D) ethylene  
 
Answer & Explanation Answer: A) abscisic acid

Explanation:

During drought, plants would be in scarcity for water. For ensuring the mineral loss of water through stomata, the plant starts to produce abscisic acid.

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Q:

For the aquatic organisms, the source of food is

A) Phytoplankton B) Sea Weed
C) Aqua plankton D) Zooplankton
 
Answer & Explanation Answer: A) Phytoplankton

Explanation:
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Q:

Blood is red in colour due to the presence of __________

A) Cytochrome B) Chlorophyll
C) Hemocyanin D) Haemoglobin
 
Answer & Explanation Answer: D) Haemoglobin

Explanation:
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Q:

A protruding part of the throat that is responsible for growing voice box in boys is called

A) Larynx B) Testosterone
C) Pharynx D) Adam's Apple
 
Answer & Explanation Answer: D) Adam's Apple

Explanation:
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Q:

Which of the following does not hold true for Animal belonging to Phylum Chordate?

A) Notochord present B) Pharynx perforated by gill slits.
C) Heart is dorsal (if present) D) A post-anal part (tail) is present
 
Answer & Explanation Answer: C) Heart is dorsal (if present)

Explanation:
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Q:

Vitamin A is also known as _____.

A) Thiamine B) Riboflavin
C) Retinol D) Calciferol
 
Answer & Explanation Answer: C) Retinol

Explanation:
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Q:

How many facial bones are there?

A) 34 B) 24
C) 14 D) 4
 
Answer & Explanation Answer: C) 14

Explanation:
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