Tag: molecular genetics

Questions Related to molecular genetics

Find out the correct options
1. Frederick Griffith - Transformation
2. Gamow - Triplet code
3. Meselson - Isolated DNA

zoology molecular basis of inheritance the search for genetic material dna structure and replication molecular genetics

  1. 1, 2, 3 correct

  2. 1, 2 correct

  3. 2, 3 correct

  4. 1, 3 correct

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Correct Option: A

What does the following signify

zoology molecular basis of inheritance the search for genetic material dna structure and replication molecular genetics

  1. Amino acid + ATP Aminoacyl AMP + PPi

  2. Chain termination

  3. Activation of amino acids

  4. Elongation of chain

  5. None of the above

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Correct Option: B

From bacteria to men, a near universal code for phenylalanine is

zoology molecular basis of inheritance the search for genetic material dna structure and replication molecular genetics

  1. UUU

  2. UUA

  3. UUG

  4. CUU

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Correct Option: A

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

zoology molecular basis of inheritance the search for genetic material dna structure and replication molecular genetics

  1. hnRNA

  2. 23 S rRNA

  3. 5S rRNA

  4. snRNA

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Correct Option: B

In Griffiths experiment, the conversion of R- type to S-type of Diplococcus pneumoniae when mixed with heat-killed S-type is called

zoology molecular basis of inheritance the search for genetic material dna structure and replication molecular genetics

  1. Mutation

  2. Transduction

  3. Transfection

  4. Transformation

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Correct Option: D

Which of the following is true with reference to transformation in bacteria
i) Transfer of genetic material is mediated by F factor
ii) Uptake of DNA fragments from the surrounding environment and expression of that genetic information in recipient cell 
iii) Transformation experiments were the basis to propose chromosomal theory of inheritance
iv) Transformation was discovered by Griffith in Streptococcus pneumonia

zoology molecular basis of inheritance the search for genetic material dna structure and replication molecular genetics

  1. i, iv

  2. ii, iii, iv

  3. iii, iv

  4. ii, iv

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Correct Option: D

A molecule that acts as a genetic material must fulfill the traits given, except

zoology molecular basis of inheritance the search for genetic material dna structure and replication molecular genetics

  1. It should provide the scope for slow changes that are required for evolution

  2. It should be able to generate its replica

  3. It should be able to express itself in the form of Mendelian characters

  4. It should be unstable structurally and chemically

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Correct Option: D

Escherichia coli in which both the strands are labelled with $^{15}N$ is transferred to $^{14}N$ medium and allowed to replicate for two generations. Find the number of hybrid DNA molecules in the second generation

zoology molecular basis of inheritance the search for genetic material dna structure and replication molecular genetics

  1. Four

  2. Eight

  3. One

  4. Two

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Correct Option: D

Beside direct chemical analysis DNA and RNA can be detected by which of the following method?
a. Photometric procedures
b. Staining reactions
c. Enzyme digestion
Select the correct answer using the codes given.

zoology molecular basis of inheritance the search for genetic material dna structure and replication molecular genetics

  1. $1, 2$ and $3$

  2. $1$ and $2$

  3. $2$ and $3$

  4. $1$ and $3$

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Correct Option: A