Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

51.

Which of the following are not the functions of genes?

I. Cell division

II. Structure and metabolism control

III. Carrier of hereditary information

IV. Provide proof for crossing over

  • I, II, III and IV

  • I, III and IV

  • I, II and III

  • II, III and IV


52.

Consider the following statements given below.

I. First living form originated from semi-arid land.

II. Nucleic acid were the first sign of life and represented beginning of life.

III. It was strongly beleived that prokaryotes evolved to from eukaryotes.

Choose the correct option

  • I and II

  • II and III

  • Only III

  • I, II and III


53.

The sequence given below 5'-GGCC-3' is recognition sequence for which of the following enzyme

  • Not 1

  • Eco R1

  • Hae III

  • Puv I


54.

Cryptorchidism in males is

  • male sterility due to prostate

  • enlargement of prostate gland

  • inguinal hernea

  • hidden testis


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55.

Paul berg's gene splicing experiment created the first rDNA molecule, which was a

  • T4 phage fragment incorporated into SV40 vector

  • Lambda phage fragment incorporated into SV40 vector

  • T4 phage fragment incorporated into pSC 101 vector

  • Lambda phage fragment incorporated into pSC 101 vector


56.

Which of the following is the best suited method for the production of virus free plants?

  • embryo culture

  • meristem culture

  • ovule culture

  • anther culture


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57.

Guillain Base syndrome is an autoimmune disease in humans. In this disease, antibodies are produced against.

  • TSH receptor on thyroid cells

  • Pancreatic beta cell antigen

  • Acetylcholine receptor of motor endplate

  • Myelin of peripheral nerves


D.

Myelin of peripheral nerves

The lack of immune response by lymphocytes to cells of the body is known as self-tolerance and appears to be due to the elimination of self-reactive lymphocytes by clonal deletion.

When self-toterance fails the body makes antibodies against its own components through T-cell activated B-lymphocytes. The body attack its own cells. leads to autoimmune diseases. Guillain Barre syndrome is acute inflammatory demyelina- ting polyneuropathy in which myelin of peripheral nerves is affected.


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58.

Where does hyaline cartilage occur in an embryo?

  • Entire skeleton of the embryo

  • surface of bones at joints

  • pinna of the outer ear and in epiglottis

  • intervertebral discs of the spinal column


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59.

Read the following statements.

I. Satellite DNA is found in the region of euchromatin

II. Prokaryotes contain only non-repetitive DNA

Identify wheather the given statements are true or false

  • Both the statements are true

  • I is true and II is false

  • I is false and II is true

  • Both the statements are false


60.

Given below is the survivorship curve of different population.

Which type of the curve has the highest chances of senescence affecting mortality?

  • Type I

  • Type I and II

  • Type III

  • Type I, II and III


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