Font size
Worksheets3.3 DNA to Proteins
Total questions: 24
Worksheet time: 12mins
Which of these is NOT a difference between immature mRNA and mature mRNA?
Mature mRNA has a poly adenosine tail on the 3' end and immature mRNA does not.
Mature mRNA has a methyl-guanosine cap on the 5' end and immature mRNA does not.
Mature mRNA is folded into a specific shape due to its properties and immature mRNA is not.
Mature mRNA is shorter than immature mRNA because the Introns are removed.
Mature mRNA can leave the nucleus and immature mRNA cannot.
DNA contains all of the following nitrogen-containing bases EXCEPT
adenine.
uracil.
guanine.
adenine.
thymine.
Rosalind Franklin used which technique to determine many of the physical characteristics of DNA?
transformation
transmission electron microscopy
density-gradient centrifugation
X-ray diffraction
all of these
Each DNA strand has a backbone that consists of alternating
covalent and ionic bonds.
nitrogen-containing bases.
hydrogen bonds.
sugar and phosphate molecules.
covalent and hydrogen bonds.
In the spiral staircase model of DNA, the rungs are
deoxyribose sugars.
nucleotide base pairs.
phosphate groups.
composed of all of these.
RNA polymerase assembles new strands
in a 5' to 3' direction only.
in a 5' to 3' direction building one strand and a 3' to 5' direction building the other strand.
in a 5' to 3' direction building the first half of a strand and a 3' to 5' direction building the second half of a strand.
in a 3' to 5' direction building the first half of a strand and a 5' to 3' direction building the second half of a strand.
in a 3' to 5' direction on the "old" 3' to 5' strand.
Franklin worked most closely with
Wilkins.
Watson.
Crick.
Chargaff.
none of these.
A linear stretch of DNA that specifies the sequence of amino acids in a polypeptide is called a(n)
codon.
intron.
messenger.
gene.
enzyme.
The two steps of transcription followed by translation
explain the structural complexity of genes.
describe the flow of genetic information.
are based upon the role of proteins in controlling life.
do not explain how genes function.
explain evolution in terms of molecular biology.
All of the different kinds of RNA are transcribed in the
mitochondria.
cytoplasm.
ribosomes.
nucleus.
endoplasmic reticulum.
DNA and RNA are alike in
the ribose sugar.
all the nitrogenous bases used to assemble the genetic code.
the number of strands.
their function in genetics.
none of these.
The relationship between strands of RNA and DNA is
antagonistic.
opposite.
complementary.
an exact duplicate.
unrelated.
Which of the following dominates in the process of transcription?
RNA polymerase
DNA polymerase
helicase
transfer RNA
all of these dominate in the process of transcription
Before messenger RNA is mature,
all exons are deleted and removed.
a cap and a tail are provided.
anticodons are assembled.
the transfer RNA transfers the messenger RNA to the ribosome.
the single RNA strand duplicates itself in much the same way as DNA.
There are how many different kinds of amino acids in proteins?
3
6
12
20
28
Of all the different codons that exist, three of them
are involved in mutations.
do not specify a particular amino acid.
cannot be copied.
provide instructions such as STOP.
do not specify a particular amino acid AND provide instructions such as STOP.
Which of the following carries amino acids to ribosomes, where amino acids are linked into the primary structure of a polypeptide?
mRNA
tRNA
hnRNA
rRNA
all of these
Which event occurs at the P site of a ribosome?
Peptide bonds form.
Free amino acids bind to the mRNA binding site.
Anticodons bind to complementary codons.
A STOP codon enters the ribosome.
The ribosomal subunits release.
During the termination stage of Translation
a STOP codon enters the ribosome.
release factors bind the ribosome.
mRNA detaches from the ribosome and the polypeptide chain.
ribosomal subunits separate.
all of these occur.
The following questions refer to the genetic code table above.
AUGCGUCCA
The sequence of amino acids specified by this mRNA is
serine − histidine − lysine.
valine − arginine − leucine.
methionine − arginine − proline.
methionine − alanine − serine.
There are how many different kinds of RNA codons?
22
3
64
12
If the DNA triplets are TAC−CGT, the mRNA codons are
Post-translational modifications include all of the following except
Folding
Modification in the Golgi
Phosphorylation
Removal of Introns
Post-transcriptional modifications include all of the following except
folding
intron splicing
3' polyadenylation
5' capping
