Biology Questions

Q:

What is the shape of the two guard cells which enclose stomata?

A) Oval B) Triangular
C) Rectangular D) Kidney shaped
 
Answer & Explanation Answer: D) Kidney shaped

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Q:

Sycon (Scypha), Spongilla (Fresh water sponge) and Euspongia (Bath sponge) are examples of which Phylum?

A) Coelenterata B) Platyhelminthes
C) Ctenophora D) Porifera
 
Answer & Explanation Answer: D) Porifera

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Q:

Which of the following is NOT a form of Monosaccharide Sugar?

A) Galactose B) Glucose
C) Fructose D) Maltose
 
Answer & Explanation Answer: D) Maltose

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Q:

Octopus belongs to the phylum

A) Mollusca B) Cnidaria
C) Echinodermata D) Chordata
 
Answer & Explanation Answer: A) Mollusca

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Q:

Anaemia is caused because of deficiency of which of the following?

A) Cobalt B) Iron
C) Sodium D) Calcium
 
Answer & Explanation Answer: B) Iron

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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:

The saliva in human beings contains which enzyme?

A) Pepsin B) Salivary Amylase  
C) Rennin D) Trypsin
 
Answer & Explanation Answer: B) Salivary Amylase  

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Q:

Monosaccharide which is responsible for the sweet taste of fruit?

A) Glucose B) Fructose
C) Mannose D) Ribose
 
Answer & Explanation Answer: B) Fructose

Explanation:

Fructose or Levulose is the monosaccharide that is responsible for the sweet taste of fruit. 

 

Monosaccharides are the simplest of all sugars, contain at least three carbon atoms, and are the building blocks of all carbohydrates.

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