Biology Questions

Q:

Which of the following forms a base pair with thymine?

A) Adenine B) Guanine 
C) Cytosine D) Thymine
 
Answer & Explanation Answer: A) Adenine

Explanation:
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Q:

Gaseous exchange takes place in leaves through tiny pores for the purpose of photosynthesis. What are these pores?

A) Chloroplast B) Stomata
C) Chlorophyl D) Vacuole
 
Answer & Explanation Answer: B) Stomata

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Q:

What is the main purpose of white blood corpuscles?

A) to carry nutrients B) to combat infection
C) to carry oxygen D) to give strength
 
Answer & Explanation Answer: B) to combat infection

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Q:

Which of the following organs produces the enzyme lipase?

A) Pancreas B) Large Intestine
C) Liver D) Small Intestine
 
Answer & Explanation Answer: A) Pancreas

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Q:

How many layers does Human Skin have?

A) 5 B) 7
C) 11 D) 3
 
Answer & Explanation Answer: D) 3

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Q:

Polynucleotide chain of DNA contains

A) a nitrogenous base, deoxyribose sugar and phosphate group B) a nitrogenous base, ribose sugar and phosphate group
C) deoxyribose sugar, ribose sugar and phosphate group D) a nitrogenous base and phosphate group only
 
Answer & Explanation Answer: A) a nitrogenous base, deoxyribose sugar and phosphate group

Explanation:

The two DNA strands are called polynucleotidesbecause they are composed of simpler monomer units called nucleotides. Eachnucleotideis composed of one of four nitrogen-containingnucleobases (cytosine, guanine, adenine or thymine), a sugar called deoxyribose, and a phosphate group.

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Q:

Which of the following vitamins contain nitrogen?

A) Vitamin A B) Vitamin B
C) Vitamin C D) Vitamin D
 
Answer & Explanation Answer: B) Vitamin B

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Q:

___________ is a condition in which there is a deficiency of red cells or of haemoglobin in the blood.

A) Albinism B) Propyria
C) Anaemia D) Keloid disorder
 
Answer & Explanation Answer: C) Anaemia

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