Question

wednesday 9/24: identifying different types of cell
started: sep 24 at 8:52pm
quiz instructions
cell organelles are like the \little workers\ inside a cell that keep everything running smoothly. each cell can stay balanced and healthy. this balance is called homeostasis, and its what allows the cell
directions:
show what you have learned during this lesson, by completing the 18 multiple - choice questions that
you may use the prokaryotic vs. eukaryotic cells organelles as a resource.
question 10
which of these best describes the nuclear membrane?
it is identical in composition to the cell membrane.
it contains pores that allow only certain molecules to pass.
it allows all molecules to pass across it into the nucleus.
it is rigid and impermeable.

Explanation:

The nuclear membrane is a double - layered membrane that surrounds the nucleus. It has nuclear pores which are selective in allowing certain molecules (like RNA, proteins) to pass between the nucleus and the cytoplasm, regulating the exchange of substances. It is not identical to the cell membrane in composition, not all molecules can pass through it, and it is not rigid and impermeable.

Answer:

It contains pores that allow only certain molecules to pass.