If an organism had a mutation in a gene that codes for a ribosomal protein, which of the following would be affected

a. dna replication
b. transcription
c. translation
d. gene expression

a community that experiences major changes undergoes progress

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.