Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

11.

According to Boyle's law, the product of pressure and volume is a constant. Hence,

  • if volume of lungs is increased, the pressure decreases disproportionately

  • if volume of lungs is increased, the pressure remains the same

  • if volume of lungs is increased, the pressure decreases proportionately

  • if volume of lungs is increased, the pressure also increases proportionately


12.

Ivan Pavlov performed experiments on

  • origin of life

  • cardiac reflexes

  • simple reflexes

  • conditioned reflexes


13.

Marasmus in children is caused by deficiency of

  • protein

  • fats

  • vitamins

  • carbohydrates


14.

Bilirubin and biliverdin are

  • enzymes

  • bile salts

  • bile pigments

  • None of these


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15.

When the organic acid is oxidised in respiration, the value of R.Q. becomes

  • zero

  • one

  • less than one

  • more than one


16.

Which of the following genotypes does not produce a sugar polymer on the surface of the RBCs?

  • IAIA

  • IAi

  • ii

  • IAIB


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17.

ABO blood grouping is controlled by gene I which has three alleles and show co-dominance. There are six genotypes. How many phenotypes in all are possible?

  • Three

  • Six

  • Five

  • Four


D.

Four

The six genotypes are as follows:

IAIA or IAi or IBIB or IBi  or IAIor ii


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18.

Auxin was first named by

  • C Darwin

  • FW Went

  • Alexopolus

  • KV Thimann


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19.

Which of the following inhibits O2 release in light phase?

  • Zeatin

  • PMA

  • DCMU

  • None of these


20.

The nitrifying bacteria that convert the ammonia to nitrates are

  • Nitrosomonas and Nitrobacter

  • Azotobacter

  • Rhizobium sp.

  • Thiobacillus denitrificans


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