The Linking Number (Lk) of a Closed-Circular, Double-Stranded DNA Molecule

question 53

Multiple Choice

The linking number (Lk) of a closed-circular, double-stranded DNA molecule is changed by:

• A) breaking a strand, then rejoining it.
• B) breaking a strand, unwinding or rewinding the DNA, then rejoining it.
• C) breaking all hydrogen bonds in the DNA.
• D) supercoiling without the breaking of any phosphodiester bonds.
• E) underwinding without the breaking of any phosphodiester bonds.

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Definitions:

Cost Curves

Graphical representations that show how the cost of producing goods changes with changes in the quantity of production.

Profit Maximization

The system by which a business calculates the price and output that lead to the highest earnings.

Marginal Revenue

The extra revenue generated from the sale of an additional unit of a product or service.

MC = MR

The condition where a firm's marginal cost equals its marginal revenue, often used to determine the optimal level of production.