Question

Choose the correct symbols:

• A. a = Reverse transcription,
  b = Translation, c = Transcription,
  d = Replication
• B. a = Replication, b = Transformation, c = Transcription, d = Translation
• C. a = Reverse transcription,
  b = Replication, c = Transcription,
  d = Translation
• D. a = Replication, b = Transcription,
  c = Translation, d = Transduction

Answer 1

The correct option is C a = Reverse transcription,

b = Replication, c = Transcription,
d = Translation
Reverse transcription
The synthesis of DNA from RNA is called reverse transcription. It is carried out by RNA-dependent DNA polymerase or reverse transcriptase enzyme.
Reverse transcription occurs in retroviruses such as HIV which have RNA as their genetic material.
Thus, ‘a’ represents reverse transcription.


Replication
DNA undergoes replication to form new copies of itself.
Thus, ‘b’ represents replication.


Transcription
The genetic code or information in the DNA is transferred into an RNA by synthesising an mRNA from the 3’-5’ template strand of DNA by transcription.
Thus, ‘c’ represents transcription.


Translation
The information carried by the RNA is expressed in the form of polypeptide chains or proteins by the process of translation.
Thus, ‘d’ represents translation.


Final answer:
(d) a = Reverse transcription, b = Replication,
c = Transcription, d = Translation