If you suspect someone has tuberculosis, staining a sputum sample is one way to identify the infectious agent, Mycobacterium tuberculosis. Which of the following staining procedures would be the most appropriate to verify the infection.
A. Gram stain
B. Acid-fast stain
C. None of the above
D. Structural stain
E. Simple stain
Ans: B. Acid-fast stain
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Which of the following takes place as an ice cube cools a drink?
A) Molecular collisions in the drink increase. B) Kinetic energy in the liquid water decreases. C) A calorie of heat energy is transferred from the ice to the water of the drink. D) The specific heat of the water in the drink decreases. E) Evaporation of the water in the drink increases.
How can one increase the rate of a chemical reaction?
A. Increase the activation energy needed. B. Cool the reactants. C. Decrease the concentration of the reactants. D. Add a catalyst. E. Increase the entropy of the reactants.
Gene duplications in Bacillus subtilis have resulted in a large gene family that encodes ________ transporters.
What will be an ideal response?
A ________ is a mass of neoplastic cells.
A. diploid culture B. metastasis C. tumor D. gall E. plaque