During protein synthesis, ribosomes
translate mRNA into polypeptides
Put the following four steps of eukaryotic gene expression in order, from beginning to end.
(1) Pre-mRNA is processed to make mRNA.
(2) Ribosomes translate the mRNA sequence to make proteins.
(3) mRNA is transported to the cytoplasm.
(4) DNA is used as a template to make pre-mRNA.
4;1;3;2
Which statement about pre-mRNA splicing is false?
It is common in prokaryotes.
In the elongation stage of translation,
rRNA is catalytically active.
Which component is required for the initiation of transcription?
Promoter DNA sequence
Which component is not involved in the elongation step of translation?
RNA polymerase
At the initiation complex of translation in eukaryotes,
the anticodon of tRNA charged with methionine binds to mRNA associated with the small ribosomal subunit.
The mRNA codon for leucine is 5?-UUG-3?, and the tRNA anticodon is
5?-CAA-3?.
Which component of transcribed RNA in eukaryotes is present in the primary transcript but is removed before translation occurs?
Intron
The first amino acid in a growing polypeptide chain is always _______ because the only codon for this amino acid is also the _______ codon.
methionine; start
Which single-base substitution in the template strand of DNA would result in the premature termination of translation (sequences are written 5′ to 3′)?
TTG to TTA
A protein destined for a lysosome carries a signal peptide for the
rough ER
Why did the original “one-gene, one-enzyme” hypothesis have to be modified?
Some enzymes are made up of more than one polypeptide.
UAU and UAC both code for tyrosine. A change from UAU to UAC would thus be a _______ mutation; a change from UAU to UAG would be a _______ mutation.
UAU and UAC both code for tyrosine. A change from UAU to UAC would thus be a _______ mutation; a change from UAU to UAG would be a _______ mutation.
Ribosomes
carry out translation.
x

Hi!
I'm Niki!

Would you like to get a custom essay? How about receiving a customized one?

Check it out