Chromatin is made up of

• DNA and protein

• DNA and histone

• DNA, RNA, protein

• RNA, histone and oil bodies

A large quantity of urban sewage is drained to nearby village river. Which among the given conditions would happen after mixing of sewage into the river?

(i) Biochemical oxygen demand (BOD) of receiving water body increases.

(ii) Dissolved oxygen of receiving water body decreases.

(iii) It will not cause mortality among fishes and other aquatic creatures.

(iv) It will lead to nutrient enrichment of receiving water body.

• (i), (ii) and (iii)

• (i), (ii) and (iv)

• (ii) and (iii)

• (iii) and (iv)

Which of the following is a secondary pollutant?

• Carbon dioxide

• Nitrogen oxides

• Peroxyacyl nitrates

• All of these

Assertion: In a regular medical examination of a small population, a 35 years old lady was found to have higher levels of oestrogens, progesterone in her blood.

Reason : The lady is 12 weeks pregnant.

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

• If both assertion and reason are hue 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: While working on Staphylococci, Alexander Fleming observed that Penicillin nolatum inhibits the growth of the bacteria.

Reason : This inhibiting chemical was commercially extracted and its full potential was established by Alexander Fleming.

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

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

• If assertion is true but reason is false.

• If both assertion and reason are false.

56.

Assertion : Saccharomyces cerevisiae produces acetic acid.

Reason : Trichoderma polysporum produces blood cholestrol lowering agent.

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

• If both assertion and reason are hue 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 : Rice field is an ecosystem for plants and animals.

Reason : Gut of human/animals is an ecosystem for flora and fauna.

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

• If both assertion and reason are hue 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 :Now-a-days, the biodiversity is declining with an accelerated rate.

Reason : Exotic species are considered to be a major cause of extinction of species.

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

• If both assertion and reason are hue 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 : Periodic abstinence is a natural method where couples abstain from coitus.

Reason : Coitus from day 5-10 should be avoided because this is the time of ovulation.

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

• If both assertion and reason are hue 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 : Only a boy child could be born with a substitution of glutamic acid by valine on 6 codon of beta-chain of haemoglobin.

Reason : The gene for the above mutation is found on Y-chromosome.

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

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

• If assertion is true but reason is false.

• If both assertion and reason are false.