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Science - Biology

Read many objective multiple choice questions of Science - biology in English. Practise online thousands of questions related to Science - biology. You can check online answer and try mock tests for Science - biology Questions provided in English.

Assertion (A): Drinking of whisky increases the frequency of urination.
Reason (R): Alcohol intake speeds up the secretion of vasopressin in the body.

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  • OOPS, your answer is incorrect

Assertion (A):  Scientists can cut apart and paste together DNA molecules at will, regardless of the source of the molecules.
Reason (R): DNA fragments can be manipulated using restriction endonucleases and DNA ligases. 

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  • OOPS, your answer is incorrect

Assertion (A): In a motion picture usually 24 frames are projected every second over the whole length of the film.
Reason (R):  An image formed on the retina of eye persists for about 0.1 s after the removal of stimulus. 

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  • OOPS, your answer is incorrect

Assertion (A): "DNA Finger printing" has become a powerful tool to establish paternity and identity of criminals in rape and assault cases.
Reason (R): Trace evidences such as hairs, saliva and dried semen are adequate for DNA analysis. 

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  • OOPS, your answer is incorrect

Assertion (A):  In human beings, the females play a major role in determining the sex of the offspring.
Reason (R): Women have two 'X' chromosomes. 

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  • OOPS, your answer is incorrect

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