WorksheetsProtein Synthesis AP Biology
Total questions: 18
Worksheet time: 10mins
Name
Class
Date
1.
What is the corresponding codon for AGT?
a)
UCA
b)
TCA
c)
UGA
d)
ACU
2.
Which of the following does not occur in prokaryotic gene expression but does occur in eukaryotic gene expression?
a)
mRNA, tRNA, and rRNA are transcribed
b)
RNA polymerase binds to the promotor
c)
a poly-A tail is added to the ends of the mRNA
d)
Transcription can begin as soon as translation has begun even alittle
3.
Transcription in eukaryotes requires which of the following in addition to RNA polymerase?
a)
the protein product of the promotor
b)
start and stop codons
c)
ribosomes and tRNA
d)
several transcription factors
4.
Which of the follwoing best describes the significance of the TATA box in eukaryotic promoters?
a)
it is the recognition site for a specific transcription factor
b)
it sets the reading frame of the mRNA
c)
it is the recognition site for ribosomal binding
d)
it signals the end of the nucleotide sequence of the gene
5.
RNA polymerase moves in which direction along the DNA?
a)
5' to 3'
b)
3' to 5' along the template strand
c)
3' to 5' along nontemplate(coding) strand
d)
5' to 3' along the template strand
6.
What is the function of the poly-A tail in mRNA?
a)
to add modified guanin to the 3' end of the mRNA
b)
to indicate the site of translational termination
c)
to code for the binding of RNA polymerase to the DNA
d)
to help protect the mRNA from degradation by hydrolytic enzymes
7.
When the spliceosome binds to a pre-mRNA transcript, where does it typically attach?
a)
to the exons
b)
to the 5'UTR
c)
to the 3'UTR
d)
at certain sequences along an intron
8.
What is the anticodon on the tRNA that binds to mRNA codon for the DNA coding sequence AAA?
a)
TTT
b)
UUU
c)
UUA
d)
AAA
9.
Accuracy in the translation of mRNA into the sequence of amino acids in a polypeptide depends on specificity in which of the following?
a)
binding of ribosomes to mRNA
b)
shape of the A and P sites of ribosomes
c)
attachment of amino acids to tRNAs
d)
bonding of the anticodon the codon and the attachment of amino acids to tRNAs
10.
Which of the following events in translation is the first to occur in eukaryotes?
a)
elongation of the polypeptide
b)
base pairing of activated methionine-tRNA to AUG of the messenger RNA
c)
binding of the larger ribosomal subunit to smaller ribosomal subunits
d)
the small subunit of the ribosome recognizing and attaching to the 5'cap
11.
Which is the best description of a gene?
a)
a DNA sequence that is expressed to form a functional product; either RNA or polypeptide
b)
a DNA subunit that codes for a single complete protein
c)
a DNA-RNA sequence combination that results in an enzymatic product
d)
a descrete unit of hereditary information that consists of a sequence of amino acids
12.
A possible sequence of nucleotides in the template strand of DNA that would code for the polypeptide sequence phe-leu-ile-val would be?
a)
5'-TTG-CTG-CAG-TAG-3'
b)
3'-AAC-GAC-GUC-AUA-5'
c)
3'-AAA-AAT-ATA-ACA-5'
d)
3'-AAA-GAA-TAA-CAA-5'
13.
A tRNA (#1) attached to the amino acid lysine enters the ribosome. The lysine binds to the growing polypeptide on the other tRNA (#2) already in the ribosome. Where does tRNA (#2 move to next?
a)
A site
b)
P site
c)
E site
d)
exit tunnel
14.
DNA holds the code for
a)
lipids
b)
carbohydrates
c)
protein
d)
sugar
15.
The main function of tRNA is to...
a)
carry a message that, when translated, forms proteins
b)
form a portion of ribosomes
c)
string together complementary RNA and DNA strands
d)
bring amino acids from the cytoplasm to the ribosomes
16.
What process is going on in this photo?
a)
Transcription
b)
Translation
c)
Replication
d)
All the above
17.
When an extra base is inserted into the DNA sequence of a gene, the protein doesn't work. Which explains why?
a)
the base increases rate of translation
b)
the base causes DNA to be transcribed in opposite direction
c)
the inserted base causes the codons in the sequence to be incorrect for the desired protein
d)
the base signals enzymes to translate DNA rather than RNA
18.
Original: ATC CAT
Mutation: ATC GCAT
What mutation occurred?
Mutation: ATC GCAT
What mutation occurred?
a)
deletion
b)
insertion
c)
silent
d)
transverse
100 %
