In vertebrate animal cells, where does the synthesis of lactate occur?
A) Mitochondrial inner membranes
B) Nucleus
C) Mitochondrial matrix
D) Surface of ribosomes
E) Fluid portion of the cytoplasm
E
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Mannitol salt agar is selective for Staphylococcus aureus because this organism
A. is often resistant to methicillin. B. can withstand high salt concentration. C. is unique in its ability to ferment mannitol. D. can tolerate brief exposures to high temperature. E. can synthesize catalase.
The major sign of pertussis occurs during which of the following phases of the disease?
A) Paroxysmal phase B) Incubation C) Catarrhal phase D) Convalescent phase
The male and female reproductive systems of an adult each include
A) gonads, tubes, gametes, hormones and secretions. B) ambiguous structures that give rise to male or female structures at puberty. C) spermatids, polar bodies, and oocytes. D) 200 to 600 million spermatocytes and a few thousand oocytes.
Cells that produce _____________ have a relatively low amount of smooth endoplasmic reticulum and a relatively high amount of rough endoplasm's reticulum.
a. triglycerides b. glycogen c. digestive enzymes d. steroid hormones