The bond in table salt (NaCl) is ____
a. polar
b. ionic
c. covalent
d. double
e. nonpolar
ANSWER: b
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In some ciliate protozoa, the codons UAA and UAG encode glutamate, rather than acting as STOP codons. How does this compare to other species?
A. This is unusual – almost all species share the same “universal” genetic code. B. This is typical – every species has its own unique genetic code. C. This is not unusual – while most species have a similar genetic code, there are often variations for some of the amino acids. 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 genetic code? Choose Answer · Given what you now know, what information and/or problem solving approach 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?
The wild-type eye color of Drosophila is red. A single-base mutation can occur that produces a white eye color. What statement is correct regarding this mutation?
A. It is an example of a mutation that alters protein function B. Individuals with white eyes have a reversion mutation C. It would be an example of a silent mutation D. The white eyed phenotyope is called an example of a neutral mutation.
If you eliminated all sources of calcium (dairy products, some vegetables) from your diet, the level of ____ would rise
in an attempt to supply calcium stored in your body to the tissues that need it.
a. aldosterone b. calcitonin c. mineralocorticoids d. parathyroid hormone e. GH
Triclosan is a common antibiotic used in antiperspirants, toothpastes, and antibacterial soaps. You are a doctor studying the evolution of bacterial resistance to triclosan. You need to find a population of nonresistant bacteria
Where should you look? A) In areas where triclosan-containing products are used frequently B) In areas where these triclosan-containing products have not been used C) In areas where bacteria are usually not found D) In areas with low percentages of bacterial infection