Protein Synthesis AP Biology

What is the corresponding codon for AGT?

• UCA
• TCA
• UGA
• ACU

Which of the following does not occur in prokaryotic gene expression but does occur in eukaryotic gene expression?

• mRNA, tRNA, and rRNA are transcribed
• RNA polymerase binds to the promotor
• a poly-A tail is added to the ends of the mRNA
• Transcription can begin as soon as translation has begun even alittle

Transcription in eukaryotes requires which of the following in addition to RNA polymerase?

• the protein  product of the promotor
• start and stop codons
• ribosomes and tRNA
• several transcription factors

Which of the follwoing best describes the significance of the TATA box in eukaryotic promoters?

• it is the recognition site for a specific transcription factor
• it sets the reading frame of the mRNA
• it is the recognition site for ribosomal binding
• it signals the end of the nucleotide sequence of the gene

RNA polymerase moves in which direction along the DNA?

• 5' to 3' 
• 3' to 5' along the template strand
• 3' to 5' along nontemplate(coding) strand
• 5' to 3' along the template strand

What is the function of the poly-A tail in mRNA?

• to add modified guanin to the 3' end of the mRNA
• to indicate the site of translational termination
• to code for the binding of RNA polymerase to the DNA
• to help protect the mRNA from degradation by hydrolytic enzymes 

When  the spliceosome binds to a pre-mRNA transcript, where does it  typically attach?

• to the exons
• to the 5'UTR
• to the 3'UTR
• at certain sequences along an intron

What is the anticodon on the tRNA that binds to mRNA codon for the DNA coding sequence AAA?

• TTT
• UUU
• UUA
• AAA

Accuracy in the translation of mRNA into the sequence of amino acids in a polypeptide depends on specificity in which of the following?

• binding of ribosomes to mRNA
• shape of the A and P sites of ribosomes
• attachment of amino acids to tRNAs
• bonding of the anticodon the codon and the attachment of amino acids to tRNAs

Which of the following events in translation is the first to occur in eukaryotes?

• elongation of the polypeptide
• base pairing of activated methionine-tRNA to AUG of the messenger RNA
• binding of the larger ribosomal subunit to smaller ribosomal subunits
• the small subunit of the ribosome recognizing and attaching to the 5'cap