Which Statements About Restriction Endonucleases Are True

question 31

Multiple Choice

Which statements about restriction endonucleases are true?
I. Each cleave DNA at the same site, but leave different fragment lengths.
II. Each recognizes 4 to 8 nucleotides, and cleaves at all sites containing the sequence.
III. Approximately 1000 restriction endonucleases have been isolated and characterized.
IV. Each cleaves the DNA strand by reducing the base off at the sugar 1' position.

• A) I, IV
• B) II, IV
• C) II, III
• D) III, IV

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Definitions:

Bad Debts Expense

The portion of receivables that are estimated to be uncollectible due to customer defaults.

Bad Debts Recovered

Income received from previously written-off accounts receivable that have unexpectedly been collected.

Bad Debts Expense

The cost associated with accounts receivable that a company is unable to collect, considered as a non-recoverable loss.

Allowance Method

An accounting technique used to estimate and account for doubtful debts, reducing accounts receivable to a more realistic value.