Question

a major function of the cell membrane is to
adhere to adjacent cells.
manufacture proteins.
control what enters and leaves the cell.
produce nucleic acids.
question 19 1 pts
this organelle primarily modifies products from the rough er, and it resembles a stack of hollow saucers, one cupped inside the next.
golgi apparatus
lysosome
rough endoplasmic reticulum
mitochondria
peroxisome
question 20 1 pt
the plasma membrane is composed of all of the following except
phospholipids.
cholesterol.
glycoproteins.
tubulin protein.

Explanation:

• For the first question, the cell - membrane's main function is to control the movement of substances in and out of the cell. Adhering to adjacent cells is not its major function, protein manufacture occurs in ribosomes and rough ER, and nucleic acid production is mainly in the nucleus.
• For the second question, the Golgi apparatus modifies products from the rough ER and has a characteristic stack - like structure. Lysosomes are for digestion, rough ER is for protein synthesis and modification (but not the main modifier of its own products), mitochondria are for energy production, and peroxisomes deal with oxidative reactions.
• For the third question, the plasma membrane is composed of phospholipids, cholesterol, and glycoproteins. Tubulin proteins are involved in the formation of microtubules, not in the composition of the plasma membrane.

Answer:

• Question 1: control what enters and leaves the cell.
• Question 19: Golgi apparatus
• Question 20: tubulin protein