The EcoRI Restriction Enzyme Recognizes and Cuts at the Sequence

question 34

Multiple Choice

The EcoRI restriction enzyme recognizes and cuts at the sequence GAATTC. Such an enzyme is expected to cut a typical double-stranded DNA at 1 in every … sites.

• A) about 400
• B) about 4000
• C) about 40,000
• D) about 400,000
• E) about 4 million

---

Definitions:

Rinne Test

A hearing test that uses a tuning fork to compare air conduction hearing with bone conduction hearing.

Weber Test

A quick screening test for hearing that involves placing a tuning fork on the center of the forehead to help diagnose unilateral (one-sided) hearing loss.

Sigmoidoscopy

An inspection of the sigmoid with an instrument.

Pulmonary Function Test

A group of tests that measure how well the lungs take in and release air and how well they move gases such as oxygen from the atmosphere into the body's circulation.