AP BIOLOGY

HEREDITY

MUTATIONS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The main function of tRNA is to ____
A
carry a message that, when translated, forms proteins
B
form a portion of ribosomes
C
string together complementary RNA and DNA strands
D
bring amino acids from the cytoplasm to the ribosomes
Explanation: 

Detailed explanation-1: -Ribosomes provide a structure in which translation can take place. They also catalyze the reaction that links amino acids to make a new protein. tRNAs (transfer RNAs) carry amino acids to the ribosome. They act as “bridges, ” matching a codon in an mRNA with the amino acid it codes for.

Detailed explanation-2: -Transfer RNA (tRNA) has a long-established role in protein synthesis. The tRNA molecule serves as an adaptor [1] between the genetic instructions written in nucleic acid sequences and the protein products encoded in genes.

Detailed explanation-3: -Transfer ribonucleic acid (tRNA) is a type of RNA molecule that helps decode a messenger RNA (mRNA) sequence into a protein. tRNAs function at specific sites in the ribosome during translation, which is a process that synthesizes a protein from an mRNA molecule.

Detailed explanation-4: -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-5: -tRNAs encoded by nuclear genomes are transcribed in the nucleus and are then exported to the cytoplasm where they perform their essential function of delivering amino acids to growing polypeptide chains as specified by mRNA codons.

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