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 Biology Questions

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Q:

Select the correct statement about immune system?

A) The causative agent in acquired immune deficiency syndrome (AIDS) is a virus that recognizes CD4 proteins B) The most common form of immunodeficiency is graft­versus­host (GVH) disease
C) Severe combined immunodeficiency (SCID) disease is an acquired condition D) Hodgkin's disease is a hereditary immunodeficiency found in children
 
Answer & Explanation Answer: A) The causative agent in acquired immune deficiency syndrome (AIDS) is a virus that recognizes CD4 proteins

Explanation:

Among the given options, the correct statement about immunodeficiency is "The causative agent in acquired immune deficiency syndrome (AIDS) is a virus that recognizes CD4 proteins".

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Q:

Some niacin is formed in the body from

A) Liver B) Skin
C) Appendix D) None of the above
 
Answer & Explanation 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.

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Q:

Mitochondrial DNA analysis is best suited for

A) analysis in which only a minute quantity of DNA material is available B) Forensic science analysis
C) analysis requiring greater discriminatory power than STR D) All of the above
 
Answer & Explanation Answer: B) Forensic science analysis

Explanation:

Mitochondrial DNA analysis is best suited for Forensic science analysis.

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Q:

Bovidae Ovis is the scientific name of _____.

A) Goat B) Cow
C) Buffalo D) Sheep
 
Answer & Explanation Answer: D) Sheep

Explanation:
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Q:

What is the full form of DNA?

A) Diribo nucleic acid B) Di nucleic acid
C) Dual nitrogen acid D) Deoxyribonucleic acid
 
Answer & Explanation Answer: D) Deoxyribonucleic acid

Explanation:
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Q:

Which of the following is not a characteristic of Pisces?

A) Exoskeleton of scales B) Breathing through gills
C) Endoskeleton of bone/cartilage D) Presence of pseudocoelom
 
Answer & Explanation Answer: D) Presence of pseudocoelom

Explanation:
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Q:

Pollen is produced by the process of

A) Mitosis B) Pollination
C) Meiosis D) Fertilization
 
Answer & Explanation Answer: A) Mitosis

Explanation:

Pollen is a male plant gamete. When microspores produced after meiosis process on microsporangia of male gametophyte undergo mitosis and forms pollen grains.

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Q:

Which of the following does nutritional genomics study?

A) how certain nutrients affect an individual's gene expression B) the precise amount of micronutrients the body needs
C) the protein content of an individual D) the genetic sequence of an individual's genome
 
Answer & Explanation Answer: A) how certain nutrients affect an individual's gene expression

Explanation:

Nutritional genomics is a science studying the effects of food and food constituents on gene expression and the relationship between human genome, nutrition and health. It is also known as nutrigenomics. It also studies how genetic variations affect the nutritional environment.

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