Phagocytosis is a process in which a cell
A. takes in foreign particles and destroys them.
B. lyses itself.
C. adheres to another cell.
D. merges with another cell forming antibodies.
E. creates molecules and then excretes them.
Answer: A
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What causes rejection by the body's immune system after a transplant of an improperly matched organ?
I) non-self proteins in the tissue II) the presence of foreign major histocompatibility complex (MHC) proteins on the donor tissue III) antibodies and cytotoxic T lymphocytes (CTLs) responding to foreign tissue A) only I and III B) only II and III C) only I and IIII D) I, II, and III
Which of the following is not true about archaeal ribosomes?
A. Differences in rRNA nucleotide sequences led to the division of the prokaryotes into two separate taxa. B. They may possess ribosome binding sites homologous to bacterial Shine-Dalgarno sequences. C. They have similar antibiotic sensitivities to those of bacteria. D. They are 70S like bacterial ribosomes.
A protein folded into an infectious conformation that is the cause of several disorders is called a(n)
____________________. Fill in the blank(s) with the appropriate word(s).
Where the thermocline forms is indicated by
a. A. b. B. c. C. d. D. e. none of these.