AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following events occurs directly after RNA polymerase recognizes a gene?
A
The polymerase strings amino acids into a polypeptide
B
Free-floating nucleotides pair up with exposed DNA bases
C
A complementary RNA strand detaches itself from the DNA
D
The DNA strand begins to unwind, separating the two strands
Explanation: 

Detailed explanation-1: -Which of the following events occurs directly after RNA polymerase recognizes the transcription start site of a gene? Free-floating nucleotides pair up with exposed DNA bases. A complementary RNA strand detaches itself from the DNA. The DNA strand begins to unwind, separating the two strands.

Detailed explanation-2: -Transcription begins when an enzyme called RNA polymerase attaches to the DNA template strand and begins assembling a new chain of nucleotides to produce a complementary RNA strand.

Detailed explanation-3: -This phenomenon is known as complementary base pairing (Figure 4), and it results in the production of two complementary strands of DNA.

Detailed explanation-4: -Once the DNA is unzipped it forms a template for the binding of the DNA Polymerase and other accessory proteins. The synthesis of a new strand occurs using this unzipped DNA as the template in the 5’-3’ direction.

There is 1 question to complete.