To Maximize the Number of Thymine Dimer Mutations Following UV

question 28

Multiple Choice

To maximize the number of thymine dimer mutations following UV exposure, should you keep human cells in tissue culture in the dark, in the light, or does it matter at all?

• A) The dark-light will activate the photorepair systems that can break thymine dimers induced by UV light.
• B) The light-it's important to keep on producing the thymine dimers by keeping the plate exposed to light as much as possible.
• C) Alternating light and dark every hour to increase the chances that thymine dimers will form, but prevent photorepair systems from correcting them as they are formed.
• D) It doesn't matter-human cells don't have the enzymes needed for photorepair of thymine dimers.
• E) Alternating light and dark every 24 hours to increase the chances that thymine dimers will form.

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Definitions:

Allowance for Doubtful Accounts

Allowance for doubtful accounts is a financial accounting provision made for receivables that may not be collectible, estimating the portion of outstanding receivables likely to be uncollectable.

Credit Balance

A situation where the amount of credits in an account exceeds the debits, often seen as a positive balance in financial and bank accounts.

Outstanding Receivables

The amount of money owed to a company by its customers for goods or services that have been delivered or used but not yet paid for.

Net Realizable Value

The estimated selling price of goods minus the cost of their sale or completion.