AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which molecule brings the amino acid to the ribosome?
A
DNA
B
mRNA
C
tRNA
D
rRNA
Explanation: 

Detailed explanation-1: -As we saw briefly in the introduction, molecules called transfer RNAs (tRNAs) bring amino acids to the ribosome.

Detailed explanation-2: -Each tRNA molecule has two distinct ends, one of which binds to a specific amino acid, and the other which binds to the corresponding mRNA codon. During translation, these tRNAs carry amino acids to the ribosome and join with their complementary codons.

Detailed explanation-3: -During protein synthesis, tRNAs with attached amino acids are delivered to the ribosome by proteins called elongation factors, which aid in association of the tRNA with the ribosome, synthesis of the new polypeptide, and translocation (movement) of the ribosome along the mRNA.

Detailed explanation-4: -Answer and Explanation: Amino acids are brought to the ribosome by transfer RNA (tRNA). During translation, the messenger RNA (mRNA) is read by the ribosome. The ribosome will read each codon, or three-base sequence, on the mRNA.

Detailed explanation-5: -Transfer RNA, abbreviated tRNA, brings amino acids to the ribosome. There are sixty-four possible formations of tRNA, and each tRNA is bonded to a specific amino acid. The ribosome matches the tRNA code to the mRNA code to build the correct sequence of amino acids.

There is 1 question to complete.