In a population of guinea pigs, short hair is dominant to long hair. If 25 percent of a breeder's guinea pigs hair, what is the frequency of the recessive allele (q)?
O 5 percent
O 15 percent
25 percent
50 percent

the answer is:

carbon dioxide

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: