This membrane protein receives signal molecules and causes a change in the cell. A. Transport protein
B. Attachment protein
C. Receptor protein
D. Enzymes

Which best explains why viruses do not have special structures or enzymes that allow them to make their own food? viruses can use energy in living cells that they infect. viruses can replicate inside a host that they infect. viruses can cause contagious illnesses in host cells. viruses integrate their rna or dna into infected cells.

Describe the primary and secondary immune response in terms of speed and number of antibodies produced?

The fauces connects which of th following structures to the oropharynx