51.

Recombinant DNA technology involves several steps in which initial step is of isolation of the DNA. Which enzymes are used in the process for the breakdown of fungal cell, plant cell and bacterial cell respectively?

• Lysozyme, lipases, trypsin

• Chitinase, cellulase, lysozyme

• Chitinase, cellulase, trypsin

• Trypsin, lipases, cellulase

Which of the following is correct regarding HIV, hepatitis B, gonorrhoea, trichomoniasis?

• Trichomoniasis is a STD whereas other are not

• Gonorrhoea is a viral disease whereas others are bacterial

• HIV is a pathogen whereas others are diseases

• Hepatitis B is eradicated completely whereas others are not

Assertion : Interferons are antiviral proteins.

Reason : Interferons are secreted by virus infected cells.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false

• If both assertion and reason are false

Assertion : Inbreeding produces pureline.

Reason : It causes homozygosity.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

Assertion : Parturition is induced by neural signal in maternal pituitary.

Reason : At the end of gestation period, the maternal pituitary release prolactin which causes uterine contractions.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false

• If both assertion and reason are false

Assertion : Commelina shows cleistogamy.

Reason : This reduces chances of inbreeding.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

Assertion : Antirrhinum is a good example to understand incomplete dominance.

Reason : Heterozygotes show characteristics of both the alleles.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion : Presence of large amounts of nutrients in water body causes excessive growth of planktonic algae.

Reason : It is due to biomagnification.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

Assertion : DNA fingerprinting involves identifying differences in specific regions in DNA sequence.

Reason : DNA fingerprinting is the basis of paternity testing.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Assertion : All pathogens are parasites but all parasites are not pathogens.

Reason : Majority of the parasites confer benefits to the host.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false

• If both assertion and reason are false