Prokaryotic Chromosome Structure

question 31

Multiple Choice

Prokaryotic chromosome structure:

• A) Is in a loosely condensed state in vivo called the "folded genome"
• B) Has 50 to 100 domains or loops, each of which is independently negatively supercoiled
• C) Consists only of DNA and protein
• D) Is unaffected by RNAse treatment
• E) Is unorganized as a "naked molecule of DNA"

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Definitions:

Enol

A chemical species characterized by a carbon-carbon double bond adjacent to an alcohol group, often in equilibrium with its keto form.

Equilibrium

A state in which the rates of the forward and reverse reactions are equal, leading to no net change in the concentration of reactants and products over time.

Iodoform Test

A chemical test for the presence of methyl ketones or secondary alcohols that can be oxidized to methyl ketones, indicated by the formation of a yellow precipitate.

4-heptanone

A seven-carbon ketone with the ketone group positioned on the fourth carbon of the chain, often used as a solvent or in organic synthesis.