Homologous chromosomes are similar in all of these characteristics EXCEPT:
A. similar in size.
B. carry the same alleles for all traits.
C. carry genes for the same traits.
D. similar in shape and location of the centromere
Answer: B. carry the same alleles for all traits.
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In a synapse, a neurotransmitter is released _____
A) in response to an action potential depolarizing the presynaptic membrane B) when threshold potential is reached C) when enough voltage-gated sodium channels open to release calcium into the synapse D) through gap junctions joining the synaptic membranes
A bacterial cell has a nonsense mutation that prevents it from producing a functional sigma subunit for RNA polymerase. Inability to synthesize a functional sigma subunit would have the most direct effect on
A. transcription initiation. B. transcription elongation. C. transcription termination. D. translation initiation. E. translation termination. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about RNA polymerase? Consider Possibilities · Consider the different answer options. Which can you rule out? 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?
All of the following were produced in experiments on primitive Earth conditions conducted by Miller-Urey and others, except for
A. amino acids. B. organic molecules. C. prokaryotes. D. hydrogen cyanide. E. urea.
Malpighian tubules are lined with which of the following to increase their absorptive surface area?
a. nephridia b. transport vesicles c. microvilli d. lysosomes