Cell Surface Molecules Are Labeled with a Fluorescent Tag and Then

question 41

Multiple Choice

Cell surface molecules are labeled with a fluorescent tag and then a portion of them are bleached with a laser beam.What would one observe after the cell is incubated for a few minutes?

• A)The bleached molecules would disappear into the cell.
• B)The bleached molecules would diffuse laterally through the membrane and intermix with unbleached molecules.
• C)The bleached molecules would remain in the spot where bleaching occurred.
• D)All the bleached molecules would flip-flop across the cell membrane.
• E)The bleached molecules would be released from the cell.

---

Definitions:

Predetermined Overhead Rate

A rate calculated before a period begins, used to allocate estimated overhead costs to products or services based on a chosen activity base.

Manufacturing Overhead

The indirect costs associated with manufacturing a product, which include expenses such as equipment depreciation, utilities, and salaries for maintenance staff.

Direct Labor-Hours

A measure of the total hours worked directly on the manufacturing of goods.

Machine-Hours

A unit of measure indicating the operational time of machinery, often used in manufacturing to allocate costs based on machine usage.