NEET NCERT Biology Molecular Basis of Inheritance questions,MCQs,pdf

Molecular Basis of Inheritance Model Test-11

Question No:1

In eukaryotic cell transcription, RNA splicing and RNA capping take place inside the

[A] Ribosomes
[B] Nucleus
[C] Dictyosomes
[D] ER

Question No:2

Which one of the following statements about the particular entity is true?

[A] Centromere is found in animal cells, which produces aster during cell division
[B] The gene for producing insulin is present in everybody cell
[C] Nucleosome is formed of nucleotides
[D] DNA consists of core of eight histones

Question No:3

The lac operon consists of

[A] Four regulatory genes only
[B] One regulatory gene and three structural genes
[C] Two regulatory genes and two structural genes
[D] Three regulatory genes and three structural genes

Question No:4

The 3— 5 phosphodiester linkages inside a polynucleotide chain serve to join

[A] One DNA strand with the other DNA strand
[B] One nucleoside with another nucleoside
[C] One nucleotide with another nucleotide
[D] One nitrogenous base with pentose sugar

Question No:5

Select the two statements out of the four (1- 4) given below about lac operon.
(1) Glucose or galactose may bind with the represser and inactivate it
(2) In the absence of lactose, the represser binds with the operator region
(3) The z-gene codes for permease
(4) This was elucidated by Francois Jacob and Jacques Monod
The correct statements are

[A] (3) and (3)
[B] (1) and (3)
[C] (2) and (4)
[D] (1)and(2)

Question No:6

The one aspect which is not a salient feature of genetic code is its being:

[A] Degenerate
[B] Ambiguous
[C] Universal
[D] Specific

Question No:7

Satellite DNA is useful tool in:

[A] Organ transplantation
[B] Sex determination
[C] Forensic science
[D] Genetic engineering

Question No:8

Which one of the following does not follow the central dogma of molecular biology?

[A] Pea
[B] Mucor
[C] Chlamydomonas

Question No:9

What are those structures that appear as ‘beads-on-string’ in the chromosomes when viewed under electron microscope?

[A] Nucleotides
[B] Nucleosomes
[C] Base pairs
[D] Genes

Question No:10

Which one of the following also acts as a catalyst in a bacterial cell?

[A] snRNA
[B] hnRNA
[C] 23 S rRNA
[D] 5 S rRNA

Question No:11

The unequivocal proof of DNA as the genetic material came from the studies on a:

[A] Bacterium
[B] Fungus
[C] Viroid
[D] Bacterial virus

Question No:12

In history of biology, human genome project led to the development of:

[A] Biotechnology
[B] Biomonitoring
[C] Bioinformatics
[D] Biosystematics

Question No:13

What is it that forms the basis of DNA Fingerprinting?

[A] The relative difference in the DNA occurrence in blood, skin and saliva
[B] The relative amount of DNA in the ridges and grooves of the fingerprints
[C] Satellite DNA occurring as highly repeated short DNA segments
[D] The relative proportions of purines and pyrimidines in DNA

Question No:14

Companion cells are closely associated with:

[A] Sieve elements
[B] Vessel elements
[C] Trichomes
[D] Guard cells

Question No:15

Removal of RNA polymerase HI from nucleoplasm will affect the synthesis of:

[A] tRNA
[B] hnRNA
[C] mRNA
[D] rRNA