defense against infectious disease

Question 1

cells are subject to attack by HIV

Answer 1

lymphocytes

Question 2

graph shows changes in the concentration of an antibody in the blood of an individual subjected to two separate infections at times x and y

Answer 2

memory B cells are involved in antibody production at Y and not at X

Question 3

compare and contrast the effect of zdc and nvp on the growth of allium roots

Answer 3

similarity - reduce root length
differences - differences become significant after 200 umol

Question 4

which of the labelled cell types will become more common in allium root tips treated with zdv

Answer 4

y will become more common and cell in y cannot progress