Biology Questions

Q:

Sexual reproduction in Algae that takes place through fusion of two dissimilar size gametes is called?

A) Zoospores B) Anisogamous
C) Isogamous D) Oogamous
 
Answer & Explanation Answer: B) Anisogamous

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Q:

What type of a body plan does coelenterates, ctenophores and echinoderms have?

A) Annelida B) Radial
C) Bilateral D) Platyhelminthes
 
Answer & Explanation Answer: B) Radial

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Q:

What distinguishes Atherosclerosis from Arteriosclerosis?

Answer

The condition of blockage of the artery due to plaque deposition in the walls which can lead to stroke or heart attack is called Atherosclerosis.


Whereas,


The condition in which the stiffening or hardening of the arteries is called as Arteriosclerosis.

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Q:

With which of the following body organ is 'pace-maker' associated?

A) Liver B) Brain
C) Heart D) Lungs
 
Answer & Explanation Answer: B) Brain

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Q:

Sponges belongs to the phylum

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

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Q:

The virus of AIDS affects the growth of_____________

A) Haemoglobin B) RBCs in blood
C) T cells in blood D) Grey cells in brain
 
Answer & Explanation Answer: C) T cells in blood

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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:

Which of the following is induced by Oncogene?

A) Polio B) Cancer
C) Diarrhoea D) Dengue
 
Answer & Explanation Answer: B) Cancer

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