The immune system component with a principal role at point B in the accompanying figure is:
a. memory cells.
b. IgM antibodies.
c. IgG antibodies.
d. cytotoxic T cells.
e. antibody IgA.
a
You might also like to view...
Histone variants:
A. have been identified for H2B and H4 but not for H2A and H3. B. differ in their C-terminal sequences but not in their N-terminal sequences. C. that have been identified are associated with transcriptional activation only. D. have variant patterns of modifications as a result of the structural differences in their terminal sequences. E. have been found to affect all cellular processes that involve DNA except DNA repair.
Nuclear membranes re-forms during
a. prophase. b. telophase. c. interphase. d. anaphase. e. metaphase
Four of the five answers listed below are
principal characteristics of all chordates. Select the EXCEPTION.
a. tail b. bony vertebra c. notochord d. nerve cord e. pharyngeal gill slits
The Cas9 nuclease is able to cleave target DNA at a single precise site by ________.
A. recognizing a palindromic sequence on the DNA and cleaving at that site leaving sticky ends B. associating with a single-stranded DNA molecule that binds to its complement on the genome to be cleaved C. using a guide RNA that hybridizes to a unique sequence on the target DNA molecule D. altering its active site to bind to and cleave any DNA sequence that is targeted