Respond to statements 112–116 with reference to the five types

of white cells listed below.
a. macrophages
b. helper T cells
c. B cells
d. cytotoxic T cells
e. natural killer cells
D 112. These cells kill tumor cells but are not B or T
lymphocytes.
M 113. These cells scavenge dead cells and attack bacteria
directly.
D 114. These cells destroy cells infected by viruses.
D 115. These cells recognize cell surface antigens and
initiate the proliferation of lymphocytes.
M 116. Antibody production occurs in these cells.


Answers: 112. e, 113. a, 114. d, 115. b, 116. c

Biology & Microbiology

You might also like to view...

After ingestion of a food particle, pH changes and enzymes contributed by the ________ will digest and hydrolyze the ingested particle in the phagocytic vacuole.

A. mitochondria B. endoplasmic reticulum C. lysosome D. plasma membrane

Biology & Microbiology

Which organelle is the primary site of ATP synthesis in eukaryotic cells?

A) lysosome B) mitochondrion C) Golgi apparatus D) peroxisome

Biology & Microbiology

Why is an enzyme from a thermophilic bacterium used in PCR?

A. It is cheaper to obtain from live microorganisms than producing the enzyme in a lab. B. This thermohile's enzyme will synthesize DNA. C. The enzyme makes DNA that is more similar to human DNA. D. DNA is replicated at a high temperature that denatures most proteins.

Biology & Microbiology

The chemical compound that acts as a reactant in an enzyme mediated reaction is called a

____________. Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology