Why do cells have a plasma membrane?

to separate proteins from the nucleus

to distinguish plants from animals

to define the size of the cell

to separate the inside of the cell from its environment

A gamete (sex cell contains 18 chromosomes. how many chromosomes in the somatic cell?

What type of virus infects bacteria

How are alleles for the same gene related

The mediastinum is located within the the cavity

Proteins are involved in all of the following roles in the body, but do not

A specific molecule was separated from a yeast cell and then placed in a flask to find out if it would bind to another molecule. This type of experimental design is called a (n) A. in vitro observation B. occupational cohort study C.

If one is experiencing difficulty sleeping, like with insomnia, he or she may go to their family doctor. What type of drug is the doctor most likely to prescribe to assist the person in falling asleep?

As you examine a soil sample under your microscope, you note the presence of tiny, worm-like organisms. You immediately suspect that these creatures are nematodes.

A proton gradient across the mitochondrial inner membrane is a requisite for the synthesis of ATP. What contributes to the creation of this proton gradient?

Peter has been seeing a counselor for problems in his sexual life. Peter's counselor referred him to an urologist to treat his problem.