The electronic configuration of the noble gas Neon, which has an atomic number of 10, can be written as follows: 1s22s22p6 . What is the electronic configuration of the noble gas Argon, which has an atomic number of 18?
A. 1s22s23p64s25p6
B. 1s22s83p8
C. 1s22s22p63s23p6
D. 1s22s62p23s63p2
C
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Dosage compensation offsets the problems associated with differences in the number of _______ chromosomes in many species
A. cytoplasmic B. autosome C. sex D. extranuclear E. mitochondrial
What adaptation(s) persisted in the human population due to the selective pressure of humans living in larger social groups and civilizations?
a. Blushing, which signals remorse and elicits forgiveness from peers b. Tears of emotion, which shows vulnerability and increases chances of receiving help c. Disease resistance d. A&B e. B&C f. A&C g. All of the above
A biologist determined the amounts of several amino acids in two separate samples of pure protein. His data stated that Protein A possessed: 7% leucine, 12% alanine, 4% histidine, 2% cysteine, and 5% glycine. Interestingly,
Protein B had the same percentages of each of the same amino acids. He concluded, from this data, that Proteins A and B are the same protein. Based on this information and his conclusion, determine which of the following is the correct statement regarding his findings: A. He is correct; they have the same percentages of each amino acid, so they are identical protein molecules. B. He is incorrect; while they may possess the same percentages of each amino acid, his findings say nothing about the order in which the amino acids are put together. The order will dictate the overall structure of the protein, so the two could be very different in shape, even though the amino acid totals are the same. C. He is correct; the order of the amino acids is irrelevant. It's only the total number of each molecule that is important to structure. D. He is incorrect; he hasn't accounted at all for the effects of pH on the composition of the protein and its effects on the individual amino acids.
Pregnancy begins with
a. implantation. b. blastocyst formation. c. gastrulation. d. conception. e. formation of the amnion.