Subject

Biology

Class

NEET Class 12

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

 Multiple Choice QuestionsMultiple Choice Questions

51.

Non-coding sequences of DNA are:

  • exon

  • intron

  • rhizoids

  • cistron


A.

exon

A segment of DNA that is both transcribed into RNA and translated into protein is called exon whereas the segment of DNA that is transcribed from eukaryotic DNA but removed before the mature m-RNA is translated into protein is called Introns.


52.

Innitiation codon is :

  • AUG

  • UUU

  • UAG

  • AAG


A.

AUG

AUG is initiation codon which codes for methionine amino acid. Methionine is first amino acid of a polypeptide chain. UAA, UAG and UGA are known as termination codons.


53.

Aleuron layer is found in :

  • embryo

  • nucellus

  • endosperm

  • endodermis


C.

endosperm

Aleuron layer is found in endosperm of maize. It comprises aleurone cells having thick walls. Each cell has several aleuronegrains. An aleurone grain is composed of protein, phytin, phospholipids and carbohydrates.


54.

Living in same habitat organisms of same species from:

  • biosphere

  • community

  • population

  • niche


C.

population

A population is a group of individuals of a species growing in a given area whereas a community is a collection of populations of different species growing in a given area.


55.

'Heterosis' is related to :

  • cloning

  • selection

  • hybridization

  • introduction


C.

hybridization

Heterosis was used by shull in 1814. It is the superiority of on F1 hybrid over both its parents in terms of yield or some other characters.


56.

Which statement is incorrect ?

  • Plant viruses contain RNA

  • Animal viruses contain DNA

  • T4 contains double strand DNA

  • TMV contains double stranded RNA


D.

TMV contains double stranded RNA

Tobacco mosaic virus (TMV), Poliovirus, HRV, VSV etc contains single stranded RNA whereas Reovirus (animals) and wound tumor virus (Plants) contain double stranded RNA.


57.

Pollination occuring from one flower to another of same plant is :

  • autogamy

  • allogamy

  • geitenogamy

  • none of these


C.

geitenogamy

Geintenogamy involves two flowers of a plant for the act of pollination.

Allogamy involves participation of two flowers from different plant for the purpose of pollination.

Autogamy involves just one flower of plant for the purpose of pollination.


58.

By anaerobic process, the cow dung is used to produce :

  • methane

  • butane

  • ethane

  • propane


A.

methane

By anaerobic process, the cow dung isused to produce biogas. Biogas is a mixture of methane (CH4) and carbon dioxide (CO2).


59.

Which of the following constitute about 10-20% of total circular RNA?

  • m-RNA

  • r -RNA

  • t-RNA

  • hn -RNA


C.

t-RNA

Transfer RNA (t-RNA) constitute about 10-20% of total cellular RNA. Since t-RNA are difficult to be separated by ultra- centrifugation, they are also called as soluble RNA (s-RNA).


60.

Jumping genes in maize were discovered by:

  • Hugo de Vries

  • T.H. Morgan

  • Barbara McClintock

  • Mendel


C.

Barbara McClintock

Barbara McClintock discovered mobile genetic elements or jumping genes or controlling elements or transposon or transposable genes in maize (Zea mays) plant.