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Molecular Basis of Inheritance · Question 103

AIPMT 2012 (Mains)MCQEasy📈 Topic in 25% papers+4−1
1

What is it that forms the basis of DNA Fingerprinting ?

  1. The relative proportions of purines and pyrimidines in DNA
  2. The relative amount of DNA in the ridges and grooves of the fingerprints
  3. The relative difference in the DNA occurrence in blood, skin and saliva
  4. Satellite DNA occurring as highly repeated short DNA segments

Answer

(4) Satellite DNA occurring as highly repeated short DNA segments

Solution

As per NCERT, DNA fingerprinting involves identifying differences in specific regions of DNA called repetitive DNA, in which a small stretch of DNA is repeated many times.

⇒ This repetitive DNA forms satellite DNA (VNTRs); these sequences show high degree of polymorphism and form the basis of DNA fingerprinting.

Answer: (4)

AIPMT 2012 (Mains)

Keep practising — Molecular Basis of Inheritance

2

Removal of introns and joining of exons in a defined order during transcription is called

  1. Looping
  2. Inducing
  3. Slicing
  4. Splicing
AIPMT 2012 (Prelims)
3

If one strand of DNA has the nitrogenous base sequence as ATCTG, what would be the complementary RNA strand sequence

  1. ATCGU
  2. UAGAC
  3. AACTG
  4. TTAGU
AIPMT 2012 (Prelims)
4

Which one of the following is not a part of a transcription unit in DNA ?

  1. The structural gene
  2. The inducer
  3. A terminator
  4. A promoter
AIPMT 2012 (Prelims)
5

Removal of RNA polymerase-III from nucleoplasm will affect the synthesis of

  1. tRNA
  2. hnRNA
  3. rRNA
  4. mRNA
AIPMT 2012 (Prelims)
6

PCR and Restriction Fragment Length Polymorphism are the methods for

  1. Genetic transformation
  2. Genetic fingerprinting
  3. Study of enzymes
  4. DNA sequencing
AIPMT 2012 (Prelims)
7

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

  1. Viroid
  2. Bacterium
  3. Fungus
  4. Bacterial virus
AIPMT 2011 (Mains)
8

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

  1. 5S rRNA
  2. snRNA
  3. hnRNA
  4. 23S rRNA
AIPMT 2011 (Prelims)
9

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

  1. Nucleosomes
  2. Genes
  3. Nucleotides
  4. Base pairs
AIPMT 2011 (Prelims)
10

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

  1. One nucleotide with another nucleotide
  2. One nitrogenous base with pentose sugar
  3. One nucleoside with another nucleoside
  4. One DNA strand with the other DNA strand
AIPMT 2010 (Mains)
11

The lac operon consists of -

  1. Three regulatory genes and three structural genes
  2. Four regulatory genes only
  3. Two regulatory genes and two structural genes
  4. One regulatory gene and three structural genes
AIPMT 2010 (Mains)

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