The infinite variety of antibodies that can be generated by B cells is due to
a. the infinite variety of genes in these cells.
b. the shuffling of genes to produce an infinite variety of proteins.
c. the recombination of genes due to crossing over.
d. the infinite variety of genes in these cells and the recombination of genes due to crossing
over.
e. the infinite variety of genes in these cells, the recombination of genes due to crossing over,
and the shuffling of genes to produce an infinite variety of proteins.
B
You might also like to view...
Under what circumstances does membrane transport require energy?
A) wherever large molecules are moved within a cell B) whenever a solute is moved against its electrochemical gradient C) whenever an ion moves through a phospholipid bilayer membrane D) whenever oxygen moves through a phospholipid bilayer membrane
This class of macromolecules serves as important energy stores and is a major component of plasma membranes.
A. lipids B. carbohydrates C. nucleic acids D. proteins E. ions
What is the product of HIV reverse
transcriptase?
a. single stranded DNA b. double stranded DNA c. single stranded RNA d. double stranded RNA e. more than one of these
A decomposer
a. is exemplified by a fungus. b. is the same as a parasite. c. feeds on living organic material. d. feeds on primary consumers only.