Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

81.

The Taq polymerase enzyme is obtained from

  • Thiobacillus ferroxidans

  • Bacillus subtilis

  • Pseudomonas subtilis

  • Pseudomonas subtilis

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82.

Which of the following most appropriately describes haemophilia?

  • X-linked recessive gene disorder
  • Chromosomal disorder

  • Dominant gene disorder

  • Dominant gene disorder


A.

X-linked recessive gene disorder

Haemophilia is a sex-linked that is X-linked recessive disorder.

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83.

Which part of the tobacco plant is infected by Meloidogyne incognitia?

  • Leaf

  • Stem

  • Root

  • Root

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84.

Which of the following statements is not true for cancer cells in relation to mutations?

  • Mutations destroy telomerase inhibitor

  • Mutations inactivate the cell control

  • Mutations inhibit production of telomerase

  • Mutations inhibit production of telomerase

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85.

Fertilisation in humans is practically feasible only if

  • the ovum and sperms are transported simultaneously to ampullary -isthmic junction of the fallopian tube

  • the ovum and sperms are transported simultaneously to ampullary -isthmic junction of the cervix

  • the sperm are transported into cervix within 48 hrs of releases of ovum in uterus

  • the sperm are transported into cervix within 48 hrs of releases of ovum in uterus

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86.

Which of the following is the starter codon?

  • UGA

  • UAA

  • UAG

  • UAG

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87.

A river with an inflow of domestic sewage-rich in organic waste may result in

  • increased population of aquatic food web organism

  • an increased production of fish due to biodegradable nutrients

  • death of fish due to lack of oxygen

  • death of fish due to lack of oxygen

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88.

A system of rotating crops with legume or grass pasture to improve soil structure and fertility is called

  • contour farming

  • strip farming

  • shifting agriculture

  • shifting agriculture

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89.

Following are the two statements regarding the origin of life

I. The earliest organisms that appeared on the earth were non-green and presumably anaerobes.
II. The first autotrophic organisms were the chemoautotrophs that never released oxygen.

Of the above statement which one of the following options is correct?

  • II is correct but I is false

  • Both I and II are correct

  • Both I and II are false

  • Both I and II are false

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90.

Gause's principle of competitive exclusion states that

  • Competition for the same resources excludes species having different food preferences

  • No two species can occupy the same niche indefinitely for the same limiting resources

  • Larger organisms exclude smaller ones through competition

  • Larger organisms exclude smaller ones through competition

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