Since the Parental Double Helix Must Rotate 360° to Unwind

question 28

Multiple Choice

Since the parental double helix must rotate 360° to unwind each gyre of the helix,during the semi-conservative replication of the bacterial chromosome,some kind of "swivel" must exist.What do geneticists now know that the required swivel is?

• A) Topoisomerase
• B) Helicase
• C) A transient single-strand break produced by the action of topoisomerases
• D) A transient single-strand break produced by the action of helicases
• E) A transient single-strand break produced by the action of Ligase

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Production Costs

The total expense incurred in the manufacturing of a product or the provisioning of a service, including raw materials, labor, and overhead expenses.

Substitute for Wheat

A comparable alternative to wheat, such as barley, rice, or corn, used in various food products or for feed.

Invisible Hand Principle

A metaphor described by Adam Smith to illustrate how individuals pursuing their own self-interest can benefit society overall, as if guided by an unseen hand.

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