Which are the special proteins in muscles that con | Biology Questions & Answers

Q:

Man has _____ pairs of salivary glands

A) 3	B) 4
C) 6	D) 8

Answer & Explanation Answer: A) 3

Explanation:

Salivary glands of man are 3 pairs = 6. They are one pair of parotid glands, one pair of sub-maxillary or sub-mandibular glands and one pair of sub-lingual glands.

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Q:

Cretinism is due to the disorder of the glands

A) Thymus	B) Parathyroid
C) Thyroid	D) Adrenal

Answer & Explanation Answer: C) Thyroid

Explanation:

Cretinism is a disease caused by hypothyroidism(less thyroxine formation).The symptoms of the disease are retardation of mental, physical and sexual developments. Potbellt, protruding tongue, dry skin etc are also indicative of this disease.

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Q:

Important objective of biotechnology in agriculture section is _________

A) % produce best resistant varieties of plant	B) % increase the nitrogen content
C) % decrease the seed number	D) % increase the plant weight

Answer & Explanation Answer: A) % produce best resistant varieties of plant

Explanation:

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Q:

Which one of the following strongly threatens biodiversity?

A) Eragile ecosystems such as mangroves and wetlands	B) Inaccessible habitates in the Himalayas
C) Desstruction of natural habitates and regetation and Jhum cultivation	D) Creation of biosphere reserves

Answer & Explanation Answer: C) Desstruction of natural habitates and regetation and Jhum cultivation

Explanation:

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Q:

The technique of DNA fingerprinting in human was developed for first time by _________

A) Lalji Singh	B) Alec Jeffreys
C) R. Ericson	D) J. Black

Answer & Explanation Answer: B) Alec Jeffreys

Explanation:

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Q:

Water pollution of a river is measured by_______

A) Amount of chlorine dissolve in water	B) Amount of Ozone dissolve in water
C) Amount of nitrogen dissolve in water	D) Amount of oxygen dissolve in water

Answer & Explanation Answer: D) Amount of oxygen dissolve in water

Explanation:

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Q:

Study of inter relationship between living organism and their environment is called _______

A) Plant Geography	B) Plant social science
C) Ecology	D) Ecosystem

Answer & Explanation Answer: C) Ecology

Explanation:

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Q:

A true species in mauritius failed to reproduce because of the extinction of a fruit eating bird. Which one of the following was that bird?

A) Dove	B) Dodo
C) Condor	D) Skua

A) Contractile protein	B) Receptor protein
C) Structural protein	D) Enzymatic protein

Which are the special proteins in muscles that contract and relax to cause movement?

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