How many codons are there for leucine?
A. two
B. three
C. five
D. six
E. four
Answer: D
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Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
What will be an ideal response?
Simple, single-celled organisms that lack a nucleus are referred to as which of the following?
a. bacteria b. fungi c. prokaryote d. eukaryote
An activator protein would have which of the following effects on an operon with a positive control
mechanism? a. stimulate transcription b. turn off transcription c. stimulate transcription when a coactivator is bound to the allosteric site d. inhibit transcription when a coactivator is bound to the allosteric site e. no response
An effector is _____
something that causes an effect a muscle or gland what a motor neuron stimulates all of the above