NTS Biology Mcqs

This Set of Multiple choice questions and answers focuses on study of Biology Mcqs that have appeared in recents NTS Test for various Jobs and interviews. You should practice our Multiple choice question to Pass any job test and interview related to Biology subjecs.

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31.
Excessive increase in temperature of medium causes the enzyme molecule to____________?

Activate

Unaffected

Denatured

None of these

32.
Of the following which one is not found in series proterostomia?

Annelida

Arthropoda

Mollusea

Echinodermata

33.
Deoxygenated blood first enters in _________ part in fishes?

Sinus venosus

Right atrium

Left atrium

Conus arteriosus

34.
The survival of an animal depends upon its ability to take some from its environment____________?

Chemicals

Hydrocarbons

Organic molecules

Inorganic molecules

35.
Which of the following statement is incorrect regarding germ theory of diseases postulated by Robert Koch_____________?

A specific organism can always be found in association with a given disease

The organism can be isolated and grown in pure culture in the laboratories

The pure culture cannot produce the disease when inoculated into susceptible animal however the causative organism isolated from pure culture can do so.

It is possible to recover the organism in pure culture from the experimentally infected animals

37.
Gaseous exchange through the skin is known as ______________ respiration?

Cuticular

Cutaneous

Skin

Pulmonary

39.
Example of bacteria requiring low concentration of oxygen is__________?

Campylobactor

spirocheta

E-coli

Pseudomonas

40.
An enzyme which can convert single stranded RNA into double stranded viral DNA is called____________?

DNAase

RNAase

DNA polymerase

Reverse Transcriptase

42.
In cell fractionation various components of cells including its organelles can be isolated in different layers depending upon____________?

Their physical properties like size & weight.

Physical properties of the medium like its density.

Their electrical properties like their charges

Both a and b

43.
Which of the statement about cell membrane is not true?

It contains protein molecules embedded in lipid bilayer

It is a differentially permeable membrane.

It contains charged pores thus ions being charged particles cross cell membrance much easier than neutral particles.

It may get infolded to engulf solid or liquid material.

44.
Which statement correctly describes the transcription of DNA?

It produces another DNA molecule

It produces mRNA

It is a semi conservation process

It occurs at surface of ribosomes

45.
The Study of organisms inhabiting the sea and Ocean and the physical and chemical characteristics of their environment is:

Social Biology

Marine Biology

Environmental Biology

Fresh Water Biology

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