Multiple Choice Questions

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Hormone responsible for the secretion of milk after parturition is

  • ICSH

  • Prolactin

  • ACTH

  • LH


B.

Prolactin

The lactation process is controlled by the hormone prolactin, secreted by the anterior pituitary gland. Lactation is the production, secretion and ejection of milk.


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First genetically modified plant commercially released in India is

  • golden rice

  • slow ripening tomato

  • Bt brinjal

  • Bt cotton


Exine of pollen grain is made up o

  • pectocellulose

  • lignocellulose

  • sporopollenin

  • pollen kit


In a DNA molecule, distance between two bases is

  • 2 nm/ 20 Å

  • 0.2 nm/ 2 Å

  • 3.4 nm/ 34 Å

  • 0.34 nm/ 3.4 Å


MRI is not allowed in the following conditions except one. Identify the exception

  • Presence of pacemaker in the body

  • Pregnant women

  • Person suffering from stroke

  • Presence of metallic plate in the body for treatment of broken bones


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Test cross is a cross between

  • hybrid and dominant parent

  • hybrid and recessive parent

  • two hybrid parents

  • two distantly related species


Which of the following diseases is related to cadmium pollution?

  • Minamata

  • Pneumoconiosis

  • Anaemia

  • Itai- Itai


Root cells of wheat has 2n = 42 chromosomes. Which one of the following is the basic chromosome number of wheat?

  • 42

  • 21

  • 7

  • 14


Micropropagation is a technique for production of

  • true to type plants

  • haploid plant

  • somatic hybrids

  • somaclonal plants


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Balbiani rings are the sites of

  • DNA replication

  • RNA and protein synthesis

  • synthesis of lipids

  • synthesis of polysaccharides