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Molecular Basis of Inheritance · Question 92

AIPMT 2014MCQEasy📈 Topic in 50% papers+4−1
1

Transformation was discovered by :

  1. Griffith
  2. Watson and Crick
  3. Hershey and Chase
  4. Meselson and Stahl

Answer

(1) Griffith

Solution

As per NCERT, in 1928 Frederick Griffith, in a series of experiments with Streptococcus pneumoniae, saw a miraculous transformation in the bacteria: heat-killed S strain converted live R strain bacteria into virulent S strain.

⇒ He concluded that the R strain bacteria had been transformed by some 'transforming principle' from the heat-killed S strain.

∴ Transformation was discovered by Griffith. (Watson and Crick – double helix model; Hershey and Chase – DNA is the genetic material; Meselson and Stahl – semiconservative replication.)

Answer: (1)

AIPMT 2014

Keep practising — Molecular Basis of Inheritance

2

Select the correct option ;

  1. Direction of RNA synthesis 3'–5', Direction of reading of the template DNA strand 5'–3'
  2. Direction of RNA synthesis 5'–3', Direction of reading of the template DNA strand 5'–3'
  3. Direction of RNA synthesis 5'–3', Direction of reading of the template DNA strand 3'–5'
  4. Direction of RNA synthesis 3'–5', Direction of reading of the template DNA strand 3'–5'
AIPMT 2014
3

An analysis of chromosomal DNA using the Southern hybridization technique does not use:

  1. Blotting
  2. PCR
  3. Electrophoresis
  4. Autoradiography
AIPMT 2014
4

Commonly used vectors for human genome sequencing are :

  1. BAC and YAC
  2. T/A Cloning Vectors
  3. T-DNA
  4. Expression Vectors
AIPMT 2014
5

The diagram shows an important concept in the genetic implication of DNA. Fill in the blanks A to C. [figure]

  1. A-translation B-extension C-Rosalind Franklin
  2. A-translation B-transcription C-Erwin Chargaff
  3. A-transcription B-translation C-Francis Crick
  4. A-transcription B-replication C-James Watson
NEET 2013
6

Which enzyme will be produced in a cell in which there is a non-sense mutation in the lac Y gene ?

  1. Transacetylase
  2. Lactose permease and transacetylase
  3. Lactose permease
  4. -galactosidase
NEET 2013
7

[figure] The figure gives an important concept in the genetic implication of DNA. Fill the blanks A, B and C.

  1. A - Erwin Chargaff B - translation C - replication
  2. A - Maurice Wilkins B - transcription C - translation
  3. A - Francis Crick B - translation C - transcription
  4. A - James Watson B - replication C - extension
NEET 2013 (Karnataka)
8

Which of the following is not a property of the genetic code ?

  1. Ambiguous
  2. Universal
  3. Degeneracy
  4. Non-overlapping
NEET 2013 (Karnataka)
9

In an inducible operon, the genes are :

  1. usually expressed unless a signal turns them "off"
  2. always expressed
  3. never expressed
  4. usually not expressed unless a signal turns them "on"
NEET 2013 (Karnataka)
10

One of the most frequently used techniques in DNA fingerprinting is :-

  1. SSCP
  2. SCAR
  3. VNTR
  4. AFLP
NEET 2013 (Karnataka)
11

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

  1. Four
  2. Two
  3. Three
  4. One
AIPMT 2012 (Mains)

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