Humans use about ________ of their daily calories to maintain brain cells and power other life-sustaining activities
A) 25%
B) 50%
C) 75%
D) 90%
Answer: C
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When copies of a gene are found at different locations on the same or different chromosomes, the phenomenon is
called _____.
a. dispersed duplication b. dispersed localization c. duplicate localization d. gene dispersion e. random dispersion
DNA sequencing makes use of dideoxynucleotides that ________
a. can be incorporated into a growing strand but cannot bind to the next nucleotide in the sequence b. have normal sugar-phosphate backbones but altered base structures c. carry pigment molecules in place of phosphate groups d. behave chemically exactly as normal nucleotides do but are labeled with colored pigments
A bird sanctuary sometimes takes over the care of eggs or chicks of an endangered duck species if the parents are killed. They are sometimes able to use mothers of farm ducks to cross-foster the chicks, but it doesn't always work. Looking at the following data table, what is the critical period for imprinting in this species? (Note: DAH stands for "days after hatching".)
A. The critical period extends from 1-3 DAH.
B. The critical period extends from 3-8 DAH.
C. The critical period ends sometime between 1-3 DAH. We can not determine from this data when the critical period begins.
D. The critical period ends sometime between 3-8 DAH. We can not determine from this data when the critical period begins.
Clarify question:
What is the key concept addressed by the question?
What type of thinking is required?
Gather Content:
What do you already know about imprinting? What other information is related to the question?
Choose Answer:
Given what you now know, what information is most likely to produce the correct answer?
Reflection 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?
The A, P, and E sites are progressively occupied by amino acids being assembled into a polypeptide. These sites are part of
A. the spliceosome. B. the large ribosomal subunit. C. tRNA. D. mRNA. E. DNA.