A gene whose expression helps to identify transformed
cell is known as
(1) Structural gene
(2) Selectable marker
(3) Vector
(4) Plasmid

Which of the following statements is not
correct ?
(1) In man insulin is synthesised as a
proinsulin.
(2) The proinsulin has an extra peptide called
C-peptide.
(3) The functional insulin has A and B chains
linked together by hydrogen bonds.
(4) Genetically engineered insulin is produced
in E-Coli.

Identify the wrong statement with reference to
immunity.
(1) When exposed to antigen (living or dead)
antibodies are produced in the host’s body.
It is called “Active immunity”.
(2) When ready-made antibodies are directly
given, it is called “Passive immunity”.
(3) Active immunity is quick and gives full
response.
(4) Foetus receives some antibodies from
mother, it is an example for passive
immunity.

If the distance between two consecutive base pairs
is 0.34 nm and the total number of base pairs of a
DNA double helix in a typical mammalian cell is
``6.6 ×10^9`` bp, then the length of the DNA is
approximately :
(1) 2.0 meters
(2) 2.5 meters
(3) 2.2 meters
(4) 2.7 meters

Colostrum the yellowish fluid, secreted by
mother during the initial days of lactation is
very essential to impart immunity to the new
born infants because it contains
(1) Natural killer cells
(2) Monocytes
(3) Macrophages
(4) Immunoglobulin A

Which part of the brain is responsible for
thermoregulation?
(1) Cerebrum
(2) Hypothalamus
(3) Corpus callosum
(4) Medulla oblongata

Thiobacillus is a group of bacteria helpful in
carrying out
(1) Nitrogen fixation
(2) Chemoautotrophic fixation
(3) Nitrification
(4) Denitrification