Regarding epitopes for BCRs and/or for TCRs, indicate whether each statement below (a-e) is true. (5 pts) If the statement is only true for epitopes for BCRs--write (B) If the statement is only true for epitopes for TCRs--write (T) If the statement is true for epitopes for both BCRs and TCR--write (BT) If the statement is NOT true for either epitopes for BCRs or TCR--write (N) a. epitopes may consist of non-sequential amino acids b. epitopes are often from the interior of an antigen c. epitopes can be present in immunogens d. epitope binding to the antigen receptor obeys the 12/23 rule e. multiple identical epitopes may be present in a single antigen

a-B

b-N

c-BT

d-BT

e-BT

Explanation:

a. epitopes may consist of non-sequential amino acids >  B (is only true for epitopes for BCRs)

b. epitopes are often from the interior of an antigen > N (IS ONLY TRUE FOR EPITOPES FOR TCR)

c. epitopes can be present in immunogens  > BT (True for both TCR and BCRs )

d. epitope binding to the antigen receptor obeys the 12/23 rule > BT (True for both TCR and BCRs )

e. multiple identical epitopes may be present in a single antigen > BT (True for both TCR and BCRs )

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

rising temperatures because when water vapor in the air is cooled, it condenses. it turns back into a liquid and attaches to dust particles in the air. these very small water droplets group together to form clouds