The Gram stain distinguished bacteria into two types of cells. This stain is dependent on the amount of in the cell wall.

A. glucose
B. a complex lipid
C. cellulose
D. peptidoglycan
E. chitin


D. peptidoglycan

Biology & Microbiology

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Which of the following reactions would require the hydrolysis of at least two ATP molecules (?G = -14.6 kCal) for it to occur?

A. A reaction that has a ?G = -8 kCal. B. A reaction that has a ?G = +8 kCal. C. A reaction that has a ?G = -16 kCal. D. A reaction that has a ?G = +16 kCal. E. A reaction that has a ?G = -14.6 kCal.

Biology & Microbiology

The presence of which hormone in a mother's

urine indicates that she is pregnant?

a. luteinizing hormone b. follicle-stimulating hormone c. human chorionic gonadotropin d. progesterone e. estrogen

Biology & Microbiology

Anthrax is

A. a zoonosis. B. only seen sporadically in the United States. C. transmitted by contact, inhalation, or ingestion. D. a disease that, in humans, can cause a rapidly fatal toxemia and septicemia. E. All of the choices are correct.

Biology & Microbiology

What is emulsification?

A) the digestion of food inside vacuoles B) the breaking up of fat molecules C) the secretion of digestive enzymes in the stomach D) the involuntary movement of a bolus through the alimentary canal

Biology & Microbiology