Restriction Enzymes

question 22

Multiple Choice

Restriction enzymes

• A) are used to extract DNA from human cells.
• B) hold the two strands together in DNA molecules.
• C) help initiate transcription.
• D) cut DNA at specific sites.
• E) splice DNA fragments together.

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Definitions:

Operating Income

The profit realized from a business's operations after deducting operating expenses such as wages and cost of goods sold.

Contribution Format

A type of income statement that separates fixed and variable costs to highlight the contribution margin.

Unit Contribution Margin

The amount that each unit sold contributes towards covering fixed costs and generating profit, calculated as the selling price per unit minus variable costs per unit.

Break-even Point

The level of sales or production at which total revenues equal total expenses, resulting in neither profit nor loss.