OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Synthesis of cDNA molecule with a base complementary to DNA
|
|
|
Synthesis of DNA molecule with a base complementary to DNA
|
|
|
Synthesis of RNA molecule with a base complementary to DNA
|
|
|
Synthesis of protein molecular with a base complementary to RNA
|
Detailed explanation-1: -DNA transcription produces a single-stranded RNA molecule that is complementary to one strand of DNA. Transcription, however, differs from DNA replication in several crucial ways. Unlike a newly formed DNA strand, the RNA strand does not remain hydrogen-bonded to the DNA template strand.
Detailed explanation-2: -Transcription uses the sequence of bases in a strand of DNA to make a complementary strand of mRNA. Triplets are groups of three successive nucleotide bases in DNA. Codons are complementary groups of bases in mRNA.
Detailed explanation-3: -The DNA sequence that is transcribed to make RNA is called the template strand, while the complementary sequence on the other DNA strand is called the coding or informational strand. To initiate RNA synthesis, the two DNA strands unwind at specific sites along the DNA molecule.
Detailed explanation-4: -Transcription is the process in which a gene’s DNA sequence is copied (transcribed) to make an RNA molecule. RNA polymerase is the main transcription enzyme. Transcription begins when RNA polymerase binds to a promoter sequence near the beginning of a gene (directly or through helper proteins).