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Biotechnology and its Application Mock Test-9

Question No:1

DNA or RNA segment tagged with a radioactive molecule is called

[A] Vector
[B] Probe
[C] Clone
[D] Plasmid

Question No:2

Genetic engineering has been successfully used for producing

[A] Transgenic mice for testing safety of polio vaccine before use in humans
[B] Transgenic models for studying new treatments for certain cardiac diseases
[C] Transgenic cow-Rosie which produces high fat milk for making ghee
[D] Animals like bulls for farm work as they have super power

Question No:3

Some of the characteristics of Bt cotton are

[A] Long fibre and resistance to aphids
[B] Medium yield, long fibre and resistance to beetle pests
[C] High yield and production of toxic protein crystals which kill dipteran pests
[D] High yield and resistance to bollworms

Question No:4

Bacillus thuringiensis forms protein crystals which contain insecticidal protein. This protein

[A] Binds with epithelial cells of mid gut of the insect pest ultimately killing it.
[B] Is coded by several genes including the gene cry.
[C] Is activated by acid pH of the foregut of the insect pest.
[D] Does not kill the carrier bacterium which is itself resistant to this toxin.

Question No:5

Silencing of mRNA has been used in producing transgenic plants resistant to

[A] Bollworms
[B] Nematodes
[C] White rusts
[D] Bacterial blights

Question No:6

Read the following four statements (A-D) about certain mistakes in two of them.
(A) The first transgenic buffalo, Rosie produced milk which was human alpha-lactalbumin enriched.
(B) Restriction enzymes are used in isolation of DNA from other macromolecules.
(C) Downstream processing is one of the steps of rDNA technology.
(D) Disarmed pathogen vectors are also used in transfer of rDNA into the host.
Which of the two statements have mistakes?

[A] B and C
[B] C and D
[C] A and C
[D] A and B

Question No:7

The process of RNA interference has been used in the development of plants resistant to:

[A] Fungi
[B] Viruses
[C] Insects
[D] Nematodes

Question No:8

Tobacco plants resistant to a nematode have been developed by the introduction of DNA that produced (in the host cells):

[A] A particular hormone
[B] An antioxidant
[C] A toxic protein
[D] Both sense and anti-sense RNA

Question No:9

Which of the following Bt crops is being grown in India by the farmers?

[A] Maize
[B] Cotton
[C] Brinjal
[D] Soybean

Question No:10

The colonies of recombinant bacteria appear white in contrast to blue colonies of non-recombinant bacteria because of:

[A] Non-recombinant bacteria containing beta galactosidase
[B] Insertional inactivation of alpha galactosidase in non-recombinant bacteria
[C] Insertional inactivation of alpha galactosidase in recombinant bacteria
[D] Inactivation of glycosidase enzyme in recombinant bacteria

Question No:11

Which of the following Bt crops is being grown in India by the fanners?

[A] Maize
[B] Cotton
[C] Brinjal
[D] Soybean

Question No:12

The first human hormone produced by recombinant DNA technology is

[A] Insulin
[B] Estrogen
[C] Thyroxin
[D] Progesterone

Question No:13

Which body of the Government of India regulates GM research and safety of introducing GM organism for public services?

[A] Bio-safety committee
[B] Indian Council of Agricultural Research
[C] Genetic Engineering Approval Committee
[D] Research Committee on Genetic manipulation

Question No:14

In Bt cotton the Bt toxin present in plant tissue as pro-toxin is converted into active toxin due to

[A] Alkaline pH of the insect gut
[B] Acidic pH of the insect gut
[C] Action of gut micro-organisms
[D] Presence of conversion factors in insect gut

Question No:15

The crops engineered for glyphosate are resistant/tolerant to:

[A] Fungi
[B] Bacteria
[C] Insects
[D] Herbicides

Question No:16

The introduction of t-DNA into plants involves:

[A] Altering the pH of soil, then heat-socking the plants
[B] Exposing the plants to cold for a brief period
[C] Allowing the plant roots to stand in water
[D] Infection of the plant by Agrobacterium tumefaciens