Which of the following contribute to the limitless diversity generated from a relatively fixed number of immunoglobulin genes?
A) hypermutation
B) random heavy and light chain reassortment
C) somatic recombination
D) hypermutation, random heavy and light chain reassortment, and somatic recombination.
Answer: D
You might also like to view...
According to the textbook, prokaryotes absorb their nutrients from the environment; however, prokaryotes also have cell walls. What can you conclude from these statements?
A. Cell walls are permeable, allowing nutrients to pass through. B. Prokaryotes live in a hypertonic environment. C. Osmosis drives the movement of nutrients through the cell wall. D. Prokaryotic cell walls contain transport proteins.
How are C4 plants able to increase the concentration of CO2 at rubisco?
A. by operating the C4 acid cycle faster than the Calvin cycle B. by suppressing photorespiration C. by using ATP to produce PEP D. by fixing HCO3 - instead of CO2 E. by using PEP carboxylase, which is not affected by O2
The mating system most prevalent in birds is ________
Fill in the blank(s) with correct word
A patient with melanoma receives three types of therapy: surgery, radiation, and interferon. Which of these represents something the immune system uses against cancer as well?
A. Interferon-TH cells and NK cells secrete interferon in response to tumor cells. B. Interferon-In complexes bound with MHC proteins, the interferons indicate the presence of altered tissue to B cells. C. Radiation-a class of lymphocytes uses powerful electromagnetic radiation to attack "altered self" cells. D. Interferon-NK cells insert interferon into the membranes of tumor cells, creating large pores that burst the cells.