A protein, is a protein that changes conformation as each ion or molecule crosses the membrane it is embedded in. This is in contrast to a channel, which lets molecules through without changing conformation for each molecule or ion. Channels can change conformation to open, close or inactivate, but they do not change conformation with each molecule that crosses.

When water freezes, it . contracts expands

Fan egg cell containing the (n+1) number of chromosomes combines with a sperm cell containing the (n) number of chromosomes, what is the result of this union? a) all future somatic cells of the organism will contain the (2n + 1) number of chromosomes. b) all future somatic cells of the organism will contain the (2n - 1) number of chromosomes. c) only certain somatic cells of the organism will contain the (2n + 1) number of chromosomes. d) all future somatic cells of the organism will contain the normal diploid number of chromosomes.

Arepair man charged $93.06 the price included 2 hours of labor and 40 service charge how much does the repairmen charge per hour for labor?