Biology Questions

Q:

Which base is found only in RNA?

A) Thyamine B) Adenine
C) Uracil D) Cytosine
 
Answer & Explanation Answer: C) Uracil

Explanation:
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Q:

The primary goal of conservation biology is to

A) counter the loss of biodiversity B) estimate the total number of species that exist
C) integrate human culture back into nature D) catalogue species
 
Answer & Explanation Answer: A) counter the loss of biodiversity

Explanation:
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Q:

Deficiency of fluoride leads to Which one of the following health problems?

A) Tooth caries B) Mottling of tooth
C) Bending of bones D) Stiffening of joints
 
Answer & Explanation Answer: A) Tooth caries

Explanation:

Fluoride deficiency is a disorder which may cause increased dental caries due to a lack of fluoride in the diet. Dental caries or tooth decay is the breakdown of dental tissues by the acidic products released by the "bacterial fermentation of dietary carbohydrates”

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Q:

Which of the following may cause the breakdown of pyruvate into lactic acid in our muscles?

A) Lack of water B) Lack of Oxygen
C) Lack of carbon dioxide D) Lack of nitrogen  
 
Answer & Explanation Answer: B) Lack of Oxygen

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Q:

What compound directly provides energy for cellular work?

A) ATP B) ADP
C) NADP D) NADH
 
Answer & Explanation Answer: A) ATP

Explanation:

ATP - Adinosine Triphosphate is the compound that directly provides energy for cellular work.

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Q:

What contributes to antigenic shift in influenza viruses?

A) a segmented genome B) different virus subtypes
C) Both A & B D) ease of virus transmission
 
Answer & Explanation Answer: A) a segmented genome

Explanation:
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Q:

Which process occurs inside the chloroplasts?

A) Photosynthesis B) Glycolysis
C) Oxidation D) None of the above
 
Answer & Explanation Answer: A) Photosynthesis

Explanation:

The process that occurs inside the chloroplasts is photosynthesis. The light from the sun is obserbed and combining with water and CO2, plants prepare food for the plants.

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Q:

Which of the following statements about aldosterone is NOT correct?

A) Aldosterone increases sodium reabsorption by increasing the number of Na+-K+ ATPase pumps in the luminal membrane of the proximal tubule. B) Aldosterone is produced in the adrenal cortex.
C) Aldosterone is stimulated by decreased plasma sodium levels and increased plasma potassium levels. D) All of the above
 
Answer & Explanation Answer: A) Aldosterone increases sodium reabsorption by increasing the number of Na+-K+ ATPase pumps in the luminal membrane of the proximal tubule.

Explanation:

Aldosterone is a steroid hormone that is produced in the adrenal gland. It is useful and more essential for the conservation of sodium content in the kidney, salivary glands, colon and sweat glands.

 

Here, Aldosterone increases sodium reabsorption by increasing the number of Na+-K+ ATPase pumps in the luminal membrane of the proximal tubule is the only option that is NOT correct about aldosterone.

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