Every 24 Hours, Every Genome in Every Cell of the Human

question 36

Multiple Choice

Every 24 hours, every genome in every cell of the human body is damaged 10,000 times or more. Given the possible DNA repair mechanisms, which order listed below would be most effective at repairing these as quickly as possible in order to prevent mutations from being carried forward in DNA replication?

• A) Proofreading by DNA polymerase, glycosylase enzyme activities, excision repair, SOS repair
• B) SOS repair, excision repair, glycosylase enzyme activities, proofreading by DNA polymerase
• C) SOS repair, proofreading by DNA polymerase, glycosylase enzyme activities, excision repair
• D) Glycosylase enzyme activities, SOS repair, proofreading by DNA polymerase, excision repair
• E) Proofreading by DNA polymerase, SOS repair, glycosylase enzyme activities, excision repair

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Definitions:

Break-even Point

The point at which total costs and total revenue are equal, resulting in no net profit or loss for the business.

Dollars

A unit of currency used in various countries, including the United States, Australia, and Canada.

Margin of Safety

The difference between actual or budgeted sales and the break-even point, indicating how much sales can decline before the company incurs a loss.

Electronics Boutique

A former chain of retail stores that specialized in video games and electronics, now known as GameStop.