You observe a microbiologist examining two plates and notice the pattern of colonies are nearly identical with the exception of a few colonies that are absent on one of them. The plates likely were produced by
A) positive selection culturing.
B) replica plating.
C) pour plating.
D) streak plating.
E) the Ames test.
B
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An advantage of YACs over other vectors in cloning human genes is that they ____
a. are taken up more readily by recipient cells b. have a higher capacity for carrying long DNA fragments c. are less likely to trigger cell rejection d. resemble a human chromosome more closely than do other vectors e. carry long regions of human-like DNA
A motor neuron and all the muscles under its control are called what kind of unit?
a. end b. movement c. muscle d. motor e. coordination
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?
What will be an ideal response?
Below is a list of breakthroughs in energy metabolism in living systems. Which is the correct order in which they are thought to have evolved?
A. H2O-splitting enzyme activity B. light-dependent transfer of electrons from H2S to NADPH C. the consumption of fermentable organic acids D. oxygen-dependent ATP synthesis (a) A, C, D, B (b) C, A, B, D (c) B, C, A, D (d) C, B, A, D