D515 Quiz 2 IMG with verified detailed answers ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Enzymes called ____________ form nicks in the DNA molecules, thereby preventing the
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formation of knots in the DNA helix during replication. - correct answer✔✔topoisomerases ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
One of the factors that may affect initiation of DNA replication in E.coli - correct
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answer✔✔the methylation state of As at oriC ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
_________ are DNA unwinding enzymes that unwind the DNA in a reaction using the ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
energy from _________ to break the _______ holding the two strands together. - correct
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answer✔✔DNA helicases, ATP hydrolysis, H bonds ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Which of the following is false ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Prokaryotic DNA is associated with histones and "packaged' in a form of chromatin ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Euchromatin may be transcriptionally active ||\\//|| ||\\//|| ||\\//|| ||\\//||
Euchromatin is less condensed than heterochromatin ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Heterochromatin is transcriptionally inactive ||\\//|| ||\\//|| ||\\//||
None of the above - correct answer✔✔Prokaryotic DNA is associated with histones and
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"packaged' in a form of chromatin ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Which type of a mutation would be most likely to have a catastrophic effect on the
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functioning of a protein? - correct answer✔✔a base deletion at the beginning of the coding ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
region
Why is an intact, linear double helix an ineffective template/substrate for DNA polymerase?
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- correct answer✔✔It has a 3'-hydroxyl group, but lacks a template.
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Enzymes called ____________ form nicks in the DNA molecules, thereby preventing the
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
formation of knots in the DNA helix during replication. - correct answer✔✔topoisomerases ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
One of the factors that may affect initiation of DNA replication in E.coli - correct
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answer✔✔the methylation state of As at oriC ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
_________ are DNA unwinding enzymes that unwind the DNA in a reaction using the ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
energy from _________ to break the _______ holding the two strands together. - correct
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answer✔✔DNA helicases, ATP hydrolysis, H bonds ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Which of the following is false ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Prokaryotic DNA is associated with histones and "packaged' in a form of chromatin ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Euchromatin may be transcriptionally active ||\\//|| ||\\//|| ||\\//|| ||\\//||
Euchromatin is less condensed than heterochromatin ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Heterochromatin is transcriptionally inactive ||\\//|| ||\\//|| ||\\//||
None of the above - correct answer✔✔Prokaryotic DNA is associated with histones and
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
"packaged' in a form of chromatin ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Which type of a mutation would be most likely to have a catastrophic effect on the
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functioning of a protein? - correct answer✔✔a base deletion at the beginning of the coding ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
region
Why is an intact, linear double helix an ineffective template/substrate for DNA polymerase?
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
- correct answer✔✔It has a 3'-hydroxyl group, but lacks a template.
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