Molecular Basis of Inheritance — Page 23 | NEET Biology

Q221

Spliceosomes are not found in cells of;

A Fungi

B Animals

C Bacteria

D Plants

Correct Answer

Option C

Solution

(c) Spliceosomes remove introns in eukaryotes; prokaryotes lack introns and spliceosomes.

Q222

All of the following are part of an operon except

A an operator

B structural genes

C a promoter

D an enhancer

Correct Answer

Option D

Solution

(d) Enhancers are eukaryotic regulatory elements; operons consist of promoter, operator and structural genes.

Q223

Non-membranous nucleoplasmic structures in nucleus are the site for active synthesis of

A tRNA

B protein synthesis

C mRNA

D rRNA

Correct Answer

Option D

Solution

(d) Nucleolus (non-membranous) synthesises ribosomal RNA (rRNA).

Q224

The basis for DNA fingerprinting is

A occurrence of restriction fragment length polymorphism (RFLP)

B phenotypic differences between individuals

C availability of cloned DNA

D knowledge of human karyotype

Correct Answer

Option A

Solution

(a) RFLP (Restriction Fragment Length Polymorphism) is the basis of DNA fingerprinting.

Q225

DNA fingerprinting refers to

A molecular analysis of profiles of DNA samples

B analysis of DNA samples using imprinting devices

C techniques used for molecular analysis of different specimens of DNA

D techniques used for identification of fingerprints of individuals

Correct Answer

Option A

Solution

(a) DNA fingerprinting is molecular analysis of unique VNTR profiles in DNA samples.

Q226

Satellite DNA is useful tool in:

A organ transplantation

B sex determination

C forensic science

D genetic engineering

Correct Answer

Option C

Solution

(c) Satellite DNA (VNTR analysis) is used in forensic science for DNA profiling.

Q227

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

A biotechnology

B biomonitoring

C bioinformatics

D biosystematics

Correct Answer

Option C

Solution

(c) Human Genome Project led to the development of bioinformatics.

Q228

Which of the following forms the basis of DNA Finger printing?

A The relative proportions of purines and pyrimidines in DNA.

B Satellite DNA occurring as highly repeated short DNA segments.

C The relative difference in the DNA occurrence in blood, skin and saliva.

D The relative amount of DNA in the ridges and grooves of the fingerprints.

Correct Answer

Option B

Solution

(b) Satellite DNA (VNTRs/minisatellites) forms the basis of DNA fingerprinting.

Q229

One of the most frequently used techniques in DNA fingerprinting is

A AFLP

B VNTR

C SSCP

D SCAR

Correct Answer

Option B

Solution

(b) VNTR (Variable Number of Tandem Repeats) is the most widely used DNA fingerprinting technique.

Q230

Satellite DNA is important because it :

A shows high degree of polymorphism in population and also the same degree of polymorphism in an individual, which is heritable from parents to children.

B does not code for proteins and is same in all members of the population

C codes for enzymes needed for DNA replication

D codes for proteins needed in cell cycle.

Correct Answer

Option A

Solution

(a) Satellite DNA shows high polymorphism and is heritable — basis of DNA fingerprinting.