Gene has a sore throat with a 101°F fever, coated tonsils, and swollen glands. He should really see a doctor because the bacteria may eventually cause ________ within his body
A) disease of the heart valves associated with rheumatic fever
B) asthma
C) emphysema
D) mesothelioma
A
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Although wildfires frequently result in the destruction of large areas of habitat, they also provide opportunities for some species of pine cone-bearing trees to disperse their seeds and grow new trees. In what other way does forest life benefit from wildfires?
a. Nocturnal predators are driven away from prey. b. Forest fires provide warmth during harsh winters. c. Ashes are rich in nitrogen and other nutrients. d. Smoke protects animals from harmful UV rays.
Two proteins, Rag-1 and Rag-2, catalyze VDJ recombination. What is the likely outcome of a deletion of the Rag genes?
A. mild susceptibility to infection due to T cell defects B. increased antibody diversity from B cells C. severe combined immunodeficiency (SCID) of both B and T cells D. increased resistance to infection due to enhanced B and T cell function Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about the VDJ segments? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Which of the following statements is FALSE
about energy in molecules?
a. Chemical bonds in molecules contain energy. b. Reactants always have less energy than products. c. Some molecules contain more energy than others. d. Molecules release energy when they react with oxygen. e. When broken, chemical bonds release energy.
A new antibiotic has been developed that inhibits the activity of an enzyme by competitive inhibition. What effect will this have on the activation energy of the enzyme-catalyzed reaction?
A. The activation energy required for the reaction in the presence of the antibiotic will be the same as the activation energy required in the absence of the antibiotic B. The activation energy required for the reaction in the presence of the antibiotic would be less than the activation energy required in the absence of the antibiotic C. The activation energy required for the reaction in the presence of the antibiotic would be greater than the activation energy required in the absence of the antibiotic