In many spirochetes, multiple flagella combine to form a bundle known as a(n) ________ fibril, which winds around the cell and confers motility on the cell.
Fill in the blank(s) with the appropriate word(s).
axial
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Which of the following can vary among monosaccharides?
A) the number of carbon atoms B) the presence of a carbonyl group C) the presence of hydroxyl groups D) the presence of sulfur groups
Optimal conditions for most mycobacterial cultures are:
a. 25°C to 30°C in the dark in an atmosphere of 2% carbon dioxide (CO2) and high hu-midity. b. 35°C in the dark in an atmosphere of 5% to 10% CO2 and high humidity. c. 35°C in the dark in a microaerophilic at-mosphere of 10% CO2 and high humidity. d. 32°C in the dark in an atmosphere of de-creased CO2 and increased humidity.
Which of the following statements is not true regarding streptococcal pharyngitis?
A. It is usually caused by the viridans streptococci. B. It can lead to serious sequelae. C. It causes redness, difficulty in swallowing, and fever. D. It can lead to scarlet fever if it is an erythrogenic toxin-producing strain. E. It presents with a purulent exudate over the tonsils.
Thyroid hormone
a. increases the resting metabolic rate of cells throughout the body. b. slows the heart rate and increases lipid metabolism. c. inhibits protein synthesis. d. increases glycolysis while decreasing oxidative phosphorylation. e. stimulates the release of ADH from the hypothalamus.