31) How many codons can act as termination codons?
A) one
B) : 1380819.
31) How many codons can act as termination codons?
A) one
B) two
C) three
D) four
32) In the sequence of events during translation, what is the next step after an mRNA binds to the ribosome’s small subunit?
A) A tRNA enters the A site of the ribosome.
B) An amino acid from a tRNA in the P site attaches to an amino acid on the tRNA in the A site.
C) A tRNA binds to the start codon, and the large ribosomal subunit joins the ribosome.
D) A tRNA is released from the E site.
E) The ribosome shifts down the mRNA by one codon.
33) In the sequence of events during translation, what is the next step after an amino acid on the tRNA in the P site is linked to an amino acid on the tRNA in the A site?
A) The tRNA is released from the A site.
B) The small ribosomal subunit attaches to the mRNA.
C) A tRNA binds to the start codon, and the large ribosomal subunit joins the ribosome.
D) The tRNA in the A site moves to the E site.
E) The ribosome shifts down the mRNA by one codon.
34) If a codon has the sequence CAG, tRNA with which anticodon will bind to it?
A) CTG
B) UGA
C) GTC
D) CAG
E) GUC
35) Which component of transcription or translation has the anticodon?
A) mRNA
B) RNA polymerase
C) tRNA
D) rRNA
E) ribosome
36) Transfer RNA (tRNA) differs from other types of RNA because it:
A) transfers genetic instructions from the cell nucleus to the cytoplasm.
B) carries the codons for amino acid sequence of a particular protein.
C) carries an amino acid at one end of the molecule and binds with the mRNA with the anticodon at the other end.
D) is made up of amino acids instead of nucleotides.
37) The set of nucleotides on a tRNA that base-pairs with nucleotides on an mRNA is the:
A) anticodon.
B) codon.
C) template.
D) primary transcript.
E) P site.
38) The process of translation is completed when:
A) a stop codon moves into the A site.
B) the cell runs out of amino acids.
C) the cell runs out of ribonucleotides.
D) the translation machinery reaches the end of the DNA molecule.
E) the stop codon is severed at the P site.
39) Introns in genes are:
A) redundant codons.
B) base sequences not required to make the protein.
C) regions where the RNA polymerase binds.
D) regulatory regions of the genome.
E) coding portions of the genome.
40) Which segment of an mRNA transcript is removed before it is translated?
A) exons.
B) operators.
C) introns.
D) Alu sequences.
E) stop codons.
31) How many codons can act as termination codons?
A) one
B) : 1380819
