The mononuclear phagocyte system (MPS) is an intricate network throughout the body that comprises
A. connective tissue and monocytes.
B. connective tissue fibers, mast cells, and basophils.
C. connective tissue fibers and phagocytic white blood cells.
D. connective tissue and lymphocytes.
Answer: C
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Which of the following is not an essential component of the bacterial elongation stage of translation?
A. functional 70S ribosome B. EF-Ts C. aminoacyl-tRNAs D. ATP
Research recently revealed that many plant stress hormones have high potential to be developed as anti-cancer agents. In fact, they were shown to induce cell death and inhibit proliferation and migration of several cancer cell types. Which group of compounds in plants is produced in times of mechanical injury stress such as when a tomato plant is being chewed by a caterpillar?
a. oligosaccharins b. gibberellins c. jasmonates d. abscisic acids
Maternal control elements in the oocyte’s cytoplasm
consist largely of a. DNA. b. RNA. c. cytoskeletal elements. d. cytoplasmic organelles. e. specialized proteins.
If the liver cells of an animal have 24 chromosomes, how many chromosomes do its sperm cells have?
A) 6 B) 12 C) 24 D) 48 E) 64