Review3

Review3 - What would be the best way to characterize the...

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What would be the best way to characterize the relationship between these two carbohydrates, and which one would you expect to be more abundant in solution? a. They are epimers, and (1) would be more abundant b. They are epimers, and (2) would be more abundant c. They are anomers, and (1) would be more abundant d. They are anomers, and (2) would be more abundant e. One is a ketohexose and one is an aldohexose, and neither would be more abundant 1 2
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A sample of DNA is subjected to dideoxy sequencing as shown here. Reactions include template DNA, primer, DNA polymerase, free deoxynucleotide triphosphates (dATP, dGTP, dCTP, and dTTP), and a different labeled 2’,3’- dideoxynucleotide analogue in each of the parallel reactions Given these gel results, what is the sequence of the template DNA? a. No sequence can be acquired. The dideoxy sequencing method is missing a vital ingredient. b. GATACGAT c. TAGCATAG d. CTATGCTA e. ATCGTATC ddGTP ddATP ddTTP ddCTP G A T C ? ? ? ? ? ? ? ?
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Xavier Mertz, a Swiss explorer, was traveling with an Australian exploration team in Antarctica in 1913 when most of their food supplies were lost down a crevasse. The team turned around to travel 315 miles back to base camp. When the food supplies ran out, Mertz died of hypervitaminosis A because he ate which of the following: a. A polar bear carcass b. His teammates c. His own left hand d. Cod liver e. Sled dog liver
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Sucrose constitutes 98-100% of the organic content of tree sap. To transform sap into maple syrup, 98% of the water in sap is evaporated-- thus increasing the sucrose concentration. Sucrose, a disaccharide, has an alpha linkage between glucose and fructose. Cellulose, a homopolysaccharide, has beta linkages between glucose residues. Which best explains why starch is water soluble while cellulose is not? a) Cellulose has hydrophobic groups, while sucrose has hydrophilic groups. b) Sucrose is smaller, which allows H 2 O to surround it more readily. c) Beta linkages are chemically more stable than alpha linkages. d) Sucrose -OH groups hydrogen bond with H 2 O, while cellulose forms inter- and intra- strand hydrogen bonds with itself. e) Cellulose is, in fact, water soluble. http://en.wikipedia.org/wiki/Cellulose jchemed.chem.wisc.edu/HS/Journal/Issues/2007/. ../p1647.pdf cellulose
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Which of the following bonds will be broken first by the thermocycler in PCR amplification of DNA? A) B) C) D) E)
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Steroids are cholesterol-based hormones with wide-ranging effects in the body. Interestingly, the transportation of these hormones in the blood almost always depends on large, steroid-specific binding globulins. Why does your body enlist the help of these particular proteins? A) They decrease the half-life of steroid molecules in the blood allowing for greater regulation. B) They increase the affinity of a steroid for its target by cleaving specific portions of the cholesterol backbone.
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Review3 - What would be the best way to characterize the...

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