Question : What is an anticodon : 2134174
6) What is an anticodon?
A. The base sequence of an mRNA that signals the termination of translation.
B. The base sequence of an mRNA that binds to a complementary codon in tRNA.
C. The base sequence of a tRNA that binds to a complementary codon in mRNA.
D. The base sequence of a tRNA that accepts an amino acid, via a reaction catalyzed by aminoacyl-tRNA synthetase
7) Aminoacyl-tRNA synthetases are enzymes that
A. catalyze loading of an anticodon onto the 3′ end of a tRNA.
B. catalyze loading of an amino acid onto the 3′ end of a tRNA.
C. catalyze loading of an amino acid onto the anticodon loop of a tRNA.
D. act as chaperones to fold tRNA into its functional L-shaped tertiary structure.
8) Transfer RNAs couple to amino acids by
A. a high-energy ester bond
B. a redox-sensitive disulfide bond
C. hydrogen bonding interactions that mimic base-pairing
D. a hydrogen bond between the tRNA 3’ OH and the amino group of the amino acid
9) Which statement is not true about ribosomes:
A. There are three tRNA binding sites on the ribosome, the A site, the P site, and the E site.
B. Ribosomal subunits are assembled in the nucleolus of the cell.
C. Peptide bond formation is catalyzed by a ribosomal protein.
D. Eukaryotic ribosomes are composed of a 40S and 60S subunit.
10) GTP hydrolysis is required for
A. joining of the 40S and 60S subunits.
B. peptide bond formation.
C. start codon recognition and initiation factor release.
D. A and C.