Question

Read the following statements carefully and choose the correct statements:
a. In a transcription unit, the promoter located at the 5' end of coding strand.
b. The single strand DNA having the polarity 3' $\to$ 5' is the template strand.
c. RNA polymerase binds to operator during transcription.
d. Single base DNA differences occur in humans are called Polymorphism.

• A. Statements a and b
• B. Statements b and c
• C. Statements b and d
• D. Statements a and d

Answer 1

The correct option is A Statements a and b

Transcription is the process of formation of RNA from the DNA. In this process, only one strand of DNA is used called as template strand which has polarity 3' to 5'. The segment of DNA that takes part in transcription is called as transcription unit in which have promoter at the 5' end of coding or 3' end of template strand, structural gene and then terminator sequence. The promoter provides the binding site to the RNA polymerase enzyme for transcription. The single base DNA difference in the human genome is called as single nucleotide polymorphism.

Thus, the correct answer is option A.