Biology Questions

Q:

Which organelles supply energy to the cell?

A) Mitochondria B) Cytoplasm
C) Ribosomes D) None of the above
 
Answer & Explanation Answer: A) Mitochondria

Explanation:

Mitochondria which is present in both plant and animal cells supplies energy to the cells and hence called as the powerhouse of the cell.

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Q:

Where does transcription occur in eukaryotes?

A) Cytoplasm B) Nucleus
C) Chromosomes D) None of the above
 
Answer & Explanation Answer: B) Nucleus

Explanation:
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Q:

When the diaphragm and external intercostal muscles contract,

A) the volume of the thorax decreases. B) the volume of the lungs decreases.
C) the volume of the thorax increases. D) the lungs shrink.
 
Answer & Explanation Answer: C) the volume of the thorax increases.

Explanation:
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Q:

Variation in human skin color is an example of

A) Heredity B) Polygenic traits
C) Multiple alleles D) Incomplete dominance
 
Answer & Explanation Answer: B) Polygenic traits

Explanation:
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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:

Visceral muscle is another name for

A) Cardiac muscle B) Smooth muscle
C) Skeletal muscle D) None of the above
 
Answer & Explanation Answer: B) Smooth muscle

Explanation:

Visceral muscle is another name for Smooth muscle.

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Q:

When it comes to cholesterol it is better to have

A) more LDL B) more HDL
C) more cholesterol D) a high ratio of LDL to HDL
 
Answer & Explanation Answer: B) more HDL

Explanation:

HDL stands for high-density lipoproteins.

HDL is called the "good" cholesterol because it carries cholesterol from other parts of your body back to your liver. Your liver then removes the cholesterol from your body.

 

Hence, when it comes to cholesterol it is better to have more HDL.

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Q:

Which of the following cells produce antibodies?

A) Plasma cells B) Monocytes
C) Mast cells D) Neutrophils
 
Answer & Explanation Answer: A) Plasma cells

Explanation:
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