All cell are surrounded by membranes. The main role of the cell membrane is to

A.regulate the cell's interactions with the environment
b.release any type of molecule out of the cell
c.arrange the cell's organelles in the cytoplasm
d.prevent water from leaking out of the cell

What type of molecule embedded in the cell membrane allows larger molecules to pass through the membrane by active transport
A phospholipids
b Proteins
c ATP
D carbohydrates

The answer of first question is A while the second question has the answer B.

The main role of the cell membrane is to regulate the cell's interactions with the environment. In this case, it means controlling what substances can enter or leave the cell. So, the correct answer to the first question is A. regulate the cell's interactions with the environment.

Now, in the second question, the molecule responsible for allowing larger molecules to pass through the cell membrane by active transport is typically proteins. Specifically, these proteins are called transport proteins or carrier proteins. They can bind to larger molecules and transport them across the cell membrane using energy (in the form of ATP). Therefore, the correct answer to the second question is B. Proteins.