During autophosphorylation, RTKs add phosphate groups to which amino acids?
a. serine
b. glycine
c. threonine
d. tryptophan
e. tyrosine
ANSWER: e
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You decide to repeat the Meselson-Stahl experiment, except this time you plan to grow the cells on light 14N medium for many generations and then transfer them to heavy 15N medium and allow them to grow for 2 additional generations (2 rounds of DNA replication). If the semiconservative model of DNA replication is correct, what is the expected distribution of DNA in the density gradient after two rounds of replication?
A. One band of intermediate density. B. One band of intermediate density and one band of light density. C. One band of intermediate density and one band of heavy density. D. One band of heavy density and one band of light density. E. One band of heavy density. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain? Gather Content · What do you already know about the Meselson-Stahl experiment? Consider Possibilities · What other information is related to the question? Which information is most useful? 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?
Which statement about SNPs in the human genome is true?
A) Most SNPs have an effect on phenotype. B) Any two human genome copies will have on average 3 million single nucleotide polymorphisms. C) SNPs refer only to deletions or insertions, not base substitutions. D) Most SNPs are located in the introns of genes, and thus effect phenotype.
A calorie is the commonly used unit of chemical energy. It is also the unit of
A. radioactivity. B. sound. C. light. D. magnetism. E. heat.
What class of antibodies is normally found in the mucosa of the respiratory tract?
a. IgA b. IgD c. IgE d. IgG e. IgM