WorksheetsUnit 6 AP Biology Review
Total questions: 15
Worksheet time: 15mins
The genetic code is essentially the same for all organisms. From this, one can logically assume all of the following except
a gene from an organism could theoretically be expressed by any other organism.
all organisms have a common ancestor.
DNA was the first genetic material.
the same codons in different organisms usually translate into the same amino acids.
RNA polymerase moves in which direction along the DNA?
3ʹ → 5ʹ along the template strand
3ʹ → 5ʹ along the coding (sense) strand
What are the coding segments of a stretch of eukaryotic DNA called?
introns
exons
Introns are significant to biological evolution because
their presence allows exons to be shuffled.
they protect the mRNA from degeneration.
A mutation in which of the following parts of a gene is likely to be most damaging to a cell?
intron
exon
Alternative RNA splicing
is a mechanism for increasing the rate of transcription.
can allow the production of proteins of different sizes from a single mRNA
When does translation begin in prokaryotic cells?
as soon as transcription has begun
once the pre-mRNA has been converted to mRNA
Why might a point mutation in DNA make a difference in the level of proteinʹs activity?
It might substitute an amino acid in the active site.
It might exchange one stop codon for another stop codon.
A frameshift mutation could result from
a base insertion only.
either an insertion or a deletion of a base.
a base deletion only.
What does the operon model attempt to explain?
the coordinated control of gene expression in bacteria
the mechanism of viral attachment to a host cell
The tryptophan operon is a repressible operon that is
turned off whenever tryptophan is added to the growth medium
turned on only when glucose is present in the growth medium.
When this is taken up by the cell, it binds to the repressor so that the repressor no longer binds to the operator:
inducer
repressor
Which of the following processes occurs during the S phase of the cell cycle?
DNA replication
Protein synthesis
Cell division
RNA transcription
In a controlled experiment, which variable is manipulated by the researcher?
Dependent variable
Independent variable
Control variable
Extraneous variable
What is the primary function of ribosomes in a cell?
Energy production
Protein synthesis
Lipid synthesis
DNA replication
