Which of the following pairs is incorrectly matched for cells and the molecules they secrete?
A. Mast cells; histamine
B. Natural killer cells; toxic chemicals
C. Eosinophils; toxic chemicals
D. Neutrophils; heparin
E. Basophils; heparin
Answer: D
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The term used when oxidative phosphorylation uses oxygen as the terminal electron acceptor is:
a. substrate-level phosphorylation. b. fermentative metabolism. c. anaerobic respiration. d. aerobic respiration.
Sitting in the sun on a hot day, a dog starts to pant and finally gets up and moves into the
shade. These activities help the dog maintain a constant body temperature; thus, this is an example of what process found in all living organism?
a. energy acquisition b. reproduction c. homeostasis d. evolution
The largest and most complex assembly of proteins in most eukaryotic cells are the:a
flagella b. ribosomes c. smooth ER d. nuclear pores e. chromosomes
Their cell wall, if present, may contain peptidoglycans:
A. Prions B. Viruses/viroids C. Eukaryotes D. None of the above