Biology Questions

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:

Which blood group is universal acceptor?

A) O+ B) O–
C) AB– D) AB+
 
Answer & Explanation Answer: D) AB+

Explanation:
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Q:

A genetically engineered form of brinjal known as the BT-­brinjal has been developed. The objective of this is

A) to make it pest resistant B) to improve its taste and nutritive value
C) to make it drought resistant D) to make its shelf-­life longer
 
Answer & Explanation Answer: A) to make it pest resistant

Explanation:
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Q:

What is the name of the hormone produced by thymus gland?

A) Thyroxine B) Auxins
C) Cytokinins D) Thymosin
 
Answer & Explanation Answer: D) Thymosin

Explanation:
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Q:

Which of the following is not true about Angiosperms?

A) Dominant phase is gametophytes B) Vascular bundles are present
C) Spores are heterospores D) Seeds are covered
 
Answer & Explanation Answer: A) Dominant phase is gametophytes

Explanation:
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Q:

All of the following are fat-soluble vitamins except

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

Explanation:

Fat-soluble vitamins except are the vitamins that are not soluble in water and are only absorbed when taken with higher fat food.

There are 4 types of fat soluble vitamins. They are :

  • Vitamin A
  • Vitamin D
  • Vitamin E
  • Vitamin K

 

Water soluble vitamins are Vitamin B and Vitamin C.

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Q:

Which of the following bacteria is responsible for the formation of curd?

A) Lycopodium B) Yeast
C) Lacto-bacillus D) Fungus
 
Answer & Explanation Answer: C) Lacto-bacillus

Explanation:
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Q:

The__________ are the primary female sex organs that produce the female gamete (ovum) and several steroid hormones (ovarian hormones).

A) Cervix B) Uterus
C) Ovaries D) Clitoris
 
Answer & Explanation Answer: C) Ovaries

Explanation:
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