1
Q:

Some niacin is formed in the body from

A) Liver B) Skin
C) Appendix D) None of the above

Answer:   A) Liver



Explanation:

Niacin is the name for vitamin(B3).

 

Liver can produce small amount of niacin from tryptophan.

 

To produce 1 mg of niacin we require 60 mg of tryptophan.

Subject: Biology
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Q:

What is commonly known as 'white plague'?

A) Typhoid B) Malaria
C) Tuberculosis D) Plague
 
Answer & Explanation Answer: C) Tuberculosis

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1 35
Q:

Algal bloom results from

A) Global warming B) Salination
C) Eutrophication D) Biomagnification
 
Answer & Explanation Answer: C) Eutrophication

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2 9
Q:

A pair of contrasting characters controlling the same trait is called

A) factors B) loci
C) allele D) lineage
 
Answer & Explanation Answer: C) allele

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3 33
Q:

The deficiency of Niacin­a vitamin of B complex group causes the disease _____

A) Marasmus B) Pellagra
C) Rickets D) Night­-blindness
 
Answer & Explanation Answer: B) Pellagra

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1 6
Q:

Which of the following increases the rate of heart beat?

A) Peripheral nerves B) Sympathetic nerves
C) Parasympathetic nerves D) Cranial nerves
 
Answer & Explanation Answer: B) Sympathetic nerves

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Q:

A few organisms can tolerate and thrive in a narrow range of temperatures. Such organisms are called ___________.

A) Osmotic B) Eurythermal
C) Stenothermal D) Hydrothermal
 
Answer & Explanation Answer: C) Stenothermal

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Q:

Asterias (Star fish), Echinus (Sea urchin), Antedon (Sea Lily) are all examples of which Phylum?

A) Echinodermata B) Annelida
C) Platyhelminthes D) Arthropoda
 
Answer & Explanation Answer: A) Echinodermata

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0 6
Q:

The members of phaeophyceae are commonly called _________ algae.

A) Green B) Brown
C) Red D) Yellow
 
Answer & Explanation Answer: B) Brown

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