Question

2.1.2 quiz: protein synthesis
question 3 of 10
which two statements correctly relate rna, amino acids, and proteins?
a. rna stores the genetic code and is transcribed into proteins.
b. rna is used to build amino acid sequences.
c. long amino acid sequences fold in specific ways to form proteins.
d. proteins are long chains of rna that have been folded in specific ways.

Explanation:

• Option B: During translation, messenger RNA (mRNA) provides the template for assembling amino acids in a specific order to form a polypeptide chain (amino acid sequence). Transfer RNA (tRNA) brings the appropriate amino acids to the ribosome based on the mRNA codons.
• Option C: Proteins are made up of one or more long chains of amino acids (polypeptides). These polypeptide chains fold into specific three - dimensional shapes (secondary, tertiary, and sometimes quaternary structures) which are essential for the protein's function.
• Option A: DNA stores the genetic code. RNA (mRNA) is transcribed from DNA and then translated into proteins.
• Option D: Proteins are long chains of amino acids, not RNA. RNA has different structures (mRNA, tRNA, rRNA) but is not the building block of proteins in the sense of being the monomer like amino acids are.

Answer:

B. RNA is used to build amino acid sequences.
C. Long amino acid sequences fold in specific ways to form proteins.