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Q:

Which one of the following statements regarding haemoglobin is correct?

A) Haemoglobin present in RBC can carry only oxygen but not carbon dioxide B) Haemoglobin of RBC can carry both oxygen and carbon dioxide
C) Haemoglobin of RBC can carry only carbon dioxide D) Haemoglobin is only used for blood clotting and not for carrying gases.
 
Answer & Explanation Answer: B) Haemoglobin of RBC can carry both oxygen and carbon dioxide

Explanation:

During respiration, about 97% of oxygen is transported by Red Blood Cells in blood and the remaining 3% gets dissolved in the plasma.Around 20-25% of carbon dioxide is carried by haemoglobin as carbamino-haemoglobin.

Oxygen enters the blood from the lungs and carbon dioxide is expelled out of the blood into the lungs. The blood serves to transport both gases. Oxygen is carried to the cells. Carbon dioxide is carried away from the cells.

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Q:

The main protein found in milk is ____________

A) Albumin B) Globulin
C) Globin D) Casein
 
Answer & Explanation Answer: D) Casein

Explanation:
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Q:

What is full form of BOD?

A) Biological Oxygen Deficit B) Biological Oxygen Difference
C) Biological Oxygen Demand D) Biological Oxygen Distribution
 
Answer & Explanation Answer: C) Biological Oxygen Demand

Explanation:
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Q:

Sponges belongs to the phylum

A) Protozoa B) Annelida
C) Porifera D) Cnidaria
 
Answer & Explanation Answer: C) Porifera

Explanation:
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Q:

Cod liver oil from fish is rich in which vitamin?

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

Explanation:
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Q:

Which of the following is not true of graded potentials?

A) They can form on receptor endings B) They increase amplitude as they move away from the stimulus point
C) They are short-lived D) They can be called postsynaptic potentials
 
Answer & Explanation Answer: B) They increase amplitude as they move away from the stimulus point

Explanation:

Graded potentials are changes in membrane potential that vary in size, as opposed to being all-or-none.

 

In the given options, They increase amplitude as they move away from the stimulus point is not true about the graded potentials.

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Q:

In a Punnett Square with the cross AaBb x Aabb, how many AaBb genotypes would be created?

A) 4 B) 1
C) 7 D) 6
 
Answer & Explanation Answer: A) 4

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Q:

The alimentary canal is a long tube that extends from ______.

A) mouth to stomach B) stomach to large intestine
C) small intestine to anus D) mouth to anus
 
Answer & Explanation Answer: D) mouth to anus

Explanation:
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