Both the strand of DNA are not copied during transcription because
If both strands act as a template, they would code for RNA with different sequence
The two RNA molecules, if produced simultaneously would be complementary to each other, hence would form a double stranded RNA
They would code, for RNA molecules with same sequences
Both A and B
A
The two RNA molecules, if produced simultaneously would be complementary to each other, hence would form a double stranded RNA
B
If both strands act as a template, they would code for RNA with different sequence
C
They would code, for RNA molecules with same sequences
D
Both A and B
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Solution
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Both the strands of DNA are not copied during transcription because if both strands act as a template, they would code for RNA with different sequence the two RNA molecules, if produced simultaneously would be complementary to each other, hence would form a double stranded RNA. Transcription is when RNA is made from DNA. During transcription, RNA polymerase makes a copy of a gene from the DNA to mRNA as needed. This process is similar in eukaryotes and prokaryotes. One difference, however, is that eukaryotic RNA polymerase associates with mRNA processing enzymes during transcription so that processing can proceed quickly after the start of transcription.
So, the correct answer is option D.
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Similar Questions
Q1
“Both the strands of DNA are not copied during transcription”.
Choose the correct reasons from the following.
A. If both strands of DNA act as a template, RNA would be coded with different sequences, leading to formation of two different polypeptide chains from the same segment of DNA.
B. If both strands of DNA act as a template, RNA would be coded with different sequences, leading to formation of the same polypeptide chains from the same segment of DNA.
C. If both strands of DNA act as a template for transcription, it simplifies the genetic information transfer machinery.
D. If both strands of DNA act as a template for transcription, it complicates the genetic information transfer machinery.
E. If both strands of DNA act as a template for transcription, dsRNA would be formed which would prevent protein formation.
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Q2
How many of the following statements are correct with respect to transcription?
i) Both the strands of DNA function as template for transcription
ii) The transcribed strand separates from the template strand
iii) A primer is required for transcription
iv) A double stranded RNA is formed after transcription
v) RNA polymerase catalyses the process of transcription
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Q3
How many of the following statements are correct?
A. Coding strand is also called a template strand which gets transcribed to RNA.
B. Template strand is considered as a non-coding strand which gets transcribed to RNA.
C. Coding strand of DNA (sense strand) has the same sequences as transcribed RNA, except for having thymine in place of RNA’s uracil.
D. The template strand of DNA has the same sequences as transcribed RNA.
E. Coding strand (sense strand) has the same sequences as transcribed RNA, except for having uracil in place of RNA’s thymine.
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Q4
If one strand of DNA has the nitrogenous base sequence as ATCTG, what would be the complementary RNA strand sequence?