AP Biology Unit 6 Test
What enhances the expression of a gene? - ANS -the attachment of RNA
polymerase to DNA
Describe what happens when the lactose operon is turned on and
transcribing. - ANS -Allolactose or lactose binds to and changes the
shape of the repressor.
Genes A,B,C, and D are located on the same chromosome. Testcrosses
show that the recombination frequency between A and B is 36% and
between A and C is 23%. The recombination frequency between C and
D is 5% and between A and D is 18%. What is the correct sequence of
the genes on the chromosome? - ANS -ADCB
The number of active copies of a gene is important to proper
development. Describe a normal process to establish proper dosage in a
cell. - ANS -Methylation of the X Chromosome
Which mutation would likely be most harmful to an organism? - ANS -a
single nucleotide deletion close to the start of the coding sequence
, The findings from the Human Genome Project reveal that humans have
only about 22,000 genes, the same as a roundworm. Explain the best
you can why the more complex humans have so few genes? - ANS -
More than one polypeptide can be produced from one gene
What is the process by which DNA makes mRNA? - ANS -Transcription
What is the process by which DNA is synthesized from a template
strand? - ANS -Replication
What is the process by which foreign DNA is taken up by a bacterial
cell? - ANS -Transformation
What is the process by which a polypeptide strand is synthesized using
mRNA as a template? - ANS -Translation
What is EcoRI? - ANS -a restriction enzyme
What is the role of DNA polymerase during DNA Replication? - ANS -To
build a new strand of DNA from 5' to 3'
What can DNA replication best be described as? - ANS -
semiconservative
What enhances the expression of a gene? - ANS -the attachment of RNA
polymerase to DNA
Describe what happens when the lactose operon is turned on and
transcribing. - ANS -Allolactose or lactose binds to and changes the
shape of the repressor.
Genes A,B,C, and D are located on the same chromosome. Testcrosses
show that the recombination frequency between A and B is 36% and
between A and C is 23%. The recombination frequency between C and
D is 5% and between A and D is 18%. What is the correct sequence of
the genes on the chromosome? - ANS -ADCB
The number of active copies of a gene is important to proper
development. Describe a normal process to establish proper dosage in a
cell. - ANS -Methylation of the X Chromosome
Which mutation would likely be most harmful to an organism? - ANS -a
single nucleotide deletion close to the start of the coding sequence
, The findings from the Human Genome Project reveal that humans have
only about 22,000 genes, the same as a roundworm. Explain the best
you can why the more complex humans have so few genes? - ANS -
More than one polypeptide can be produced from one gene
What is the process by which DNA makes mRNA? - ANS -Transcription
What is the process by which DNA is synthesized from a template
strand? - ANS -Replication
What is the process by which foreign DNA is taken up by a bacterial
cell? - ANS -Transformation
What is the process by which a polypeptide strand is synthesized using
mRNA as a template? - ANS -Translation
What is EcoRI? - ANS -a restriction enzyme
What is the role of DNA polymerase during DNA Replication? - ANS -To
build a new strand of DNA from 5' to 3'
What can DNA replication best be described as? - ANS -
semiconservative
