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Q:

______ is a thyroid hormone which controls the balance of calcium in the body.

A) Calcitonin B) Thyroxine
C) Calmodulin D) all of these
 
Answer & Explanation Answer: A) Calcitonin

Explanation:

Calcitonin is 32-amino acid linear polypeptide hormone that is produced in humans primarily by the parafollicular cells of the thyroid, and in many other animals in the ultimopharyngeal body. It acts to reduce blood calcium, opposing the effects of parathyroid hormone.

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Q:

Which of the following has open vascular system?

A) Cockroach B) Human
C) Rat D) Birds
 
Answer & Explanation Answer: A) Cockroach

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Q:

Which feature of the cell allows or permits the entry and exit of some materials in and out of the cell?

A) Cytoplasm B) Protoplasm
C) Cell wall D) Plasma membrane
 
Answer & Explanation Answer: D) Plasma membrane

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Q:

___ has naked seeds.

A) Pinus B) Lemon
C) Carrot D) Wheat
 
Answer & Explanation Answer: A) Pinus

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Q:

Prawns belong to which family?

A) Crustaceans B) Fish
C) Amphibians D) Reptiles
 
Answer & Explanation Answer: A) Crustaceans

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Q:

Which enzyme has been used by scientists of Massachusetts Institute of Technology to induce plants to give off dim light?

 

A) Carotenogen B) Luciferase
C) Reductase D) Peroxidase
 
Answer & Explanation Answer: B) Luciferase

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Q:

Lungs are the primary organs of _________.

A) Digestion B) Constipation
C) Perspiration D) Respiration
 
Answer & Explanation Answer: D) Respiration

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Q:

Which component of the blood transports food, CO2 and nitrogenous waste?

A) WBCs B) Blood platelets
C) RBCs D) Plasma
 
Answer & Explanation Answer: D) Plasma

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