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Molecular Basis of Inheritance · Question 102

AIPMT 2012 (Mains)MCQMedium📈 Topic in 88% papers+4−1
1

Read the following four statements (A-D) : How many of the above statements are right ?

  1. Four
  2. Two
  3. Three
  4. One

Answer

(2) Two

Solution

A. In transcription, adenine of the template pairs with uracil of RNA (RNA has uracil in place of thymine) — correct.

B. As per NCERT, regulation of the lac operon by the repressor is referred to as negative regulation — wrong.

C. As per NCERT, the human genome has about 30,000 genes, not 50,000 — wrong.

D. Haemophilia is a sex-linked recessive disease — correct.

∴ Two statements (A and D) are right.

Answer: (2)

AIPMT 2012 (Mains)

Keep practising — Molecular Basis of Inheritance

2

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
AIPMT 2012 (Mains)
3

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)
4

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)
5

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)
6

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

  1. tRNA
  2. hnRNA
  3. rRNA
  4. mRNA
AIPMT 2012 (Prelims)
7

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)
8

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)
9

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)
10

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)
11

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)

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