DNA is composed of four nucleotides, A, C, G and T. Each codon is composed of three nucleotides. The number of possible codons is
A) 16.
B) 4.
C) 12.
D) 64.
E) 32.
D
Bloom's Taxonomy: Application
Section: Gene Function
Learning Outcome: 7.13
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Why would antimicrobials that have toxic side effects be used at all (select the BEST reason)?
A. We want the largest possible number of choices of drugs in case a microbe shows resistance. With more possible weapons (even toxic ones), we have greater ability to eliminate infections. B. Every person is different. What is toxic to one person may not be toxic to another person. To eliminate a useful drug because it's toxic to 1% of people treated is a waste. C. Depending on the location of the infection, we may have no choice but to utilize a drug that has some toxic side effects to the patient. D. They shouldn't be used. We have enough of a selection of drugs that we can always select a drug with no toxicity. Drugs with toxicity are simply leftovers-relics from a time when we didn't have as many drug options.
Friedreich's ataxia is a condition associated with defective mitochondria. Which symptom is not associated with this condition?
a. Profuse sweating b. Loss of coordination c. Weak muscles d. Poor balance e. Heart problems
Cilia and flagella are most similar in ____.
A. length B. the kinds of cells that have them C. the number that cells usually have D. their internal composition and structure E. their location along the cell's periphery
Match the microscope part with it's function.
Fine focus A) Focus light onto the specimen B) Control the amount of light reaching the specimen C) Brings the specimen into general focus D) Increases the detail of the image