Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

91.

Biochemical Oxygen Demand (BOD) in a river water

  • remains unchanged when algal bloom occurs

  • has no relationship with the concentration of oxygen in the water

  • gives a measure of Salmonella in the water

  • gives a measure of Salmonella in the water

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92.

Which one of the following is the correct matching of the events occurring during menstrual cycle?

  • Ovulation - LH and FSH attain peak level and sharp fall in the secretion of progesterone

  • Proliferative - Rapid regeneration of myometrium and maturation of Graafian follicle

  • Development of corpus - luteum - Secretory phase and increased secretion of progesterone

  • Development of corpus - luteum - Secretory phase and increased secretion of progesterone

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93.

Semiconservative replication of DNA was first demonstrated in

  • Drosophila melanogaster

  • Escherichia Coli

  • Streptococcus pneumoniae

  • Streptococcus pneumoniae


B.

Escherichia Coli

Semiconservative replication of DNA was first demonstrated in E.coil. According to the semiconservative mode proposed by Waston and Crick, each strand of the two double helices formed would have one old and one new strand. The semiconservative nature of DNA of replication was proved by the experiment of Meselson and Stahl (1958).

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94.

A young infant may be feeding entirely on mother's milk, which is white in colour but the stools, which the infant passes out is quite yellowish. What is the yellow colour due to?

  • Intestinal Juice

  • Bile pigements passed through bile juice

  • Undigested milk protein casein

  • Undigested milk protein casein

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95.

Which one of the following statements is correct?

  • Patients, who had undergone surgery are given cannabinoids to relieve pain

  • Benign tumours show the property of metastasis

  • Heroin accelerates body functions

  • Heroin accelerates body functions

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96.

Transgenic plants are

  • produced by a somatic embryo in an artificial medium

  • generated by introducing foreign DNA into a cell and regenerating a plant from that cell

  • Produced by protoplast fusion in the artificial medium

  • Produced by protoplast fusion in the artificial medium

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97.

Global agreement on specific control strategies to reduce the release of ozone depleting substance was adopted by

  • Rio de Janerio Conference

  • The Montreal protocol

  • The koyoto protocol

  • The koyoto protocol

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98.

The letter T in T-lymphocyte refer to 

  • thyroid

  • thalamus

  • tonsil

  • tonsil

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99.

An example of a seed with endosperm, perisperm and caruncle is 

  • Cotton

  • coffee

  • lily

  • lily

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100.

What is not true for genetic code?

  • A condon in mRNA is read in a non-contiguous fashion

  • It is nearly universal 

  • It is degenerate

  • It is degenerate

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