Organisms that produce beta-lactamase can be considered resistant to all of the following antibiotics EXCEPT:
A. ampicillin
B. amoxicillin
C. penicillin
D. vancomycin
Ans: D. vancomycin
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Where are developing lymphocytes tested to determine whether they'll bind to self-proteins?
What will be an ideal response?
A sequence of bases located upstream from a reference point occurs towards the:a
3? end of the amino acid sequence. b. 5? end of the mRNA sequence. c. 3? end of the mRNA sequence. d. 5? end of the transcribed DNA strand. e. carboxyl end of the amino acid sequence.
Transcription of structural genes in an inducible operon _____
A) occurs continuously in the cell B) starts when the pathway's substrate is present C) starts when the pathway's product is present D) stops when the pathway's product is present
"Smart" plants can reduce overuse of fertilizers by
A) using photosynthesis and fungal relationships to generate their own fertilizer. B) informing the grower of a nutrient deficiency before damage occurs. C) slowing the process of minerals washing out of the soils. D) storing fertilizers in their root systems until they are needed.