Multiple Choice
In RNA, which nitrogenous base forms a complementary base pair with guanine through hydrogen bonding?
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7. DNA and Chromosome Structure
RNA
Multiple Choice
In gene expression, what is the primary role of messenger RNA (mRNA)?
A
It forms the lipid bilayer of the nuclear membrane.
B
It catalyzes peptide bond formation as part of the ribosome.
C
It transports amino acids to the ribosome during translation.
D
It carries the genetic code transcribed from DNA to the ribosome to direct protein synthesis.
Verified step by step guidance1
Understand that gene expression involves the process by which information from a gene is used to synthesize a functional gene product, usually a protein.
Recognize that DNA contains the genetic code, but it cannot leave the nucleus, so a molecule is needed to carry this information to the site of protein synthesis.
Identify messenger RNA (mRNA) as the molecule that is transcribed from DNA in the nucleus and carries the genetic code in the form of codons.
Know that mRNA travels from the nucleus to the ribosome in the cytoplasm, where it serves as a template for assembling amino acids into a protein.
Distinguish the roles of other RNA types: transfer RNA (tRNA) transports amino acids, and ribosomal RNA (rRNA) catalyzes peptide bond formation, but mRNA's primary role is to carry the genetic code.
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