AP Biology-Protein Synthesis

Front

What is the corresponding codon for AGT? Options: UCA, TCA, UGA, ACU

Back

UCA

Front

Which description of nucleotide triplets best represents a codon? Options: a triplet separated spatially from other triplets, a triplet that has no corresponding amino acid, a sequence of tRNA at the 3' end, a triplet in the same reading frame as an upstream AUG

Back

a triplet in the same reading frame as an upstream AUG

Front

Which of the following does not occur in prokaryotic gene expression but does occur in eukaryotic gene expression? Options: 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 a little.

Back

a poly-A tail is added to the ends of the mRNA

Front

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

Back

several transcription factors

Front

What is the significance of the TATA box in eukaryotic promoters?

Back

It is the recognition site for a specific transcription factor.

Front

RNA polymerase moves in which direction along the DNA?

Back

3' to 5' along the template strand

Front

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

Back

to help protect the mRNA from degradation by hydrolytic enzymes

Front

What is a ribozyme?

Back

RNA with enzymatic activity

Front

Where does the spliceosome typically attach when it binds to a pre-mRNA transcript? Options: to the exons, to the 5'UTR, to the 3'UTR, at certain sequences along an intron

Back

at certain sequences along an intron

Front

Anticodon on tRNA for mRNA codon of DNA coding sequence AAA? Options: TTT, UUU, UUA, AAA

Back

UUU