Online Biotechnology Test - Biotechnology Test - Random

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Total number of questions: 20.
Time allotted: 30 minutes.
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Phagemid vectors are

combination of plasmid and phage λ

combination of phages and cosmid

phages carrying properties of plasmids

all of the above

[#]

A major plant macronutrient found in nucleic acids and proteins is

calcium

nitrogen

sulphur

iron

[#]

The homologous chromosomes follow the process of synopsis in the

leptotene

zygotene

pachytene

diplotene

[#]

The transfer of intermediate vectors into Agrobacterium are brought about by

transformation

biparental mating

triparental mating

transduction

[#]

Which of the following is true about Agrobacterium tumefaciens?

It causes crown gall disease of plants

It infects gymosperms

It infects dicotyledonous angiosperms

All of the above

[#]

For developing herbicide resistance in transgenic plants which of the following approach/(es) is/are used?

Target molecule is made insensitive to herbicide

Target protein is overproduced

A pathway should be introduced that detoxify the herbicide

All of the above

[#]

MS medium, is found essential for initial morphogenesis of the immature embryos and to enhance callus development, when supplemented with

GA₃

GA₃ and coconut milk

adenine

adenine and kinetin

[#]

Random amplified polymorphic DNA (RAPD) is a method that

stimulate production of sense RNA to compensate

activate the expression of all genes in a biochemical pathway

eliminate the expression of all genes in a biochemical pathway

reveals intra-specific variation and diversity between species

[#]

Cultivated tomato species (Lycopersicon esculentum) is highly susceptible to

Meloidogyne spp. nematodes

L. peruviaanum

both (a) and (b)

Solarium melongena

[#]

10.

The hybrid embryo can be rescued from damage/collapse by growing it

at low temperature

at low pH

at low water activity

in artificial medium

[#]

11.

What structure forms as a network of protein cables during cell division?

Spindle

Aster

Kinetochore

Chromatid

[#]

12.

Specific oxygen consumption rates for mammalian cells are in the range of (where n and p represents to nano and pico respectively)

0.05-5 nmol of O₂/cell/h

5 - 10 nmol of O₂ /cell/h

0.05-5 pmol of O₂/cell/h

5 - 10 pmol of O₂/cell/h

[#]

13.

Disaggregating of cells can be achieved by

physical disruption

enzymatic digestion

treating with chelating agents

all of the above

[#]

14.

For the transfer of whole individual chromosomes, they are isolated from the cells at

prophase

metaphase

telophase

anaphase

[#]

15.

High ethanol concentration

promotes yeast growth

inhibits yeast growth

promotes bacterial growth

inhibits bacterial growth

[#]

16.

The fermentor can be sterilized by

keeping it in the oven

steam under pressure

boiling

all of these

[#]

17.

Wine yeast

is sensitive to sulphur di oxide

is resistant to sulphur di oxide

shows enhanced enzyme production in presence of sulphur di oxide

none of the above

[#]

18.

Chaptalization is

adding sucrose to must

adding grape juice to must

adding sugar to wine before bottling

adding grape juice to wine before bottling

[#]

19.

After storage and recarbonation, left over yeast is separated by

centrifugation

filtration

cell disruption

need not to be separated

[#]

20.

For the recovery of citric acid after fermentation, Ca(OH)₂ is added to the slurry to

precipitate calcium carbonate

precipitate calcium citrate

precipitate calcium phosphate

precipitate calcium sulphate

[#]

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