Dr Carol Greider Shared a Nobel Prize for Discovering the Molecule

question 35

Multiple Choice

Dr. Carol Greider shared a Nobel Prize for discovering the molecule telomerase in cells. What does this molecule do in a cell?

• A) It helps minimize damage to chromosomes as a cell divides, thus controlling the lifespan of the cell.
• B) It causes damage to chromosomes as a cell divides, thus causing the cell to age prematurely.
• C) It causes damage to chromosomes as a cell divides, thus triggering cancer.
• D) It helps minimize damage copying errors as DNA is duplicated when a cell divides, thus preventing mutations and controlling the lifespan of a cell.
• E) It is involved in cell division, controlling the lifespan of a cell, but it's not yet clear how it does this.

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Definitions:

Break-even Point

The point at which total costs and total revenue are equal, meaning there is no net loss or gain, and one is "breaking even."

Contribution Margin

The amount remaining from sales revenue after all variable expenses are deducted, indicating how much contributes to covering fixed costs and generating profit.

Variable Costs

Costs that change in proportion to the level of production or sales activity within a business.

Fixed Costs

Expenses that do not change with the level of production or sales over a certain period, such as rent, salaries, and insurance.