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Molecular Basis of Inheritance

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

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)

Keep practising — Molecular Basis of Inheritance

Ques. 2AIPMT 2014

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'
Ques. 3AIPMT 2014

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

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

Commonly used vectors for human genome sequencing are :

  1. BAC and YAC
  2. T/A Cloning Vectors
  3. T-DNA
  4. Expression Vectors
Ques. 5NEET 2013

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
Ques. 6NEET 2013

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
Ques. 7NEET 2013 (Karnataka)

[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
Ques. 8NEET 2013 (Karnataka)

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

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

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"
Ques. 10NEET 2013 (Karnataka)

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

  1. SSCP
  2. SCAR
  3. VNTR
  4. AFLP
Ques. 11AIPMT 2012 (Mains)

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

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

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