Usabo open exam Study guides, Class notes & Summaries

USABO Open Exam 2009 Questions And Answers Both amino acids and nucleotides form complex chains. Select all the answers below that are accurate. A. The chains formed by both have polar phosphate groups. B. Both contain peptide bonds. C. Both contain nitrogen. D. The chains formed by both can be lysed by trypsin. E. The sequence of chains both form from preexisting templates. - ANS C. Both contain nitrogen. E. The sequence of chains both form from preexisting templates. When a...

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USABO Open Exam 2009 Questions And Answers Sunflower chromosomes have been isolated and their DNA/NT analyzed. It was found that chromosome 2 has unusually high content of Adenine (40%). How many percent of Guanine is present in chromosome 2? A. 10% B. 20% C. 30% D. 40 % E. 50% - ANS A. 10% Sunflower chromosomes have been isolated and their DNA/NT analyzed. It was found that chromosome 2 has unusually high content of Adenine (40%). Assume that the entire sequence of the chromos...

The production of the genetically engineered "golden rice" could be important to people of developing nations, especially in South-East Asia, because: A. people are more likely to consume yellow grains than white. B. golden rice is less expensive to grow and harvest than white rice. C. golden rice has been engineered to be resistant to most commercially available herbicides. D. golden rice has been engineered to contain higher concentrations of β-carotene than white rice. E. golden rice...

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USABO Open Exam 2006 Questions And Answers Insulin injected by diabetics to control blood sugar levels is derived from bacteria whose DNA has been modified by the addition of the human gene for insulin, which is then produced by the prokaryotes. This is an example of: A. acid therapy. B. cloning. C. genetic engineering. D. gene therapy. E. pluripotency. - ANS C. genetic engineering. Isolated RNA molecules are generally less stable than DNA at physiological pH because: A. RNA h...

Both amino acids and nucleotides form complex chains. Select all the answers below that are accurate. A. The chains formed by both have polar phosphate groups. B. Both contain peptide bonds. C. Both contain nitrogen. D. The chains formed by both can be lysed by trypsin. E. The sequence of chains both form from preexisting templates. correct answersC. Both contain nitrogen. E. The sequence of chains both form from preexisting templates. When a population is in Hardy-Weinberg equilibriu...

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Why is myelin important in the nervous system? A. It allows signals to travel faster along axons because depolarization occurs only at myelinated locations. B. It allows signals to travel faster along axons because depolarization occurs only at nonmyelinated locations. C. It bundles the dendrites of adjacent neurons together. D. It increases capacitance across the cell membrane, which helps electrical signals to leave the axons. E. It traps neurotransmitters, increasing their concentratio...

Why is myelin important in the nervous system? A. It allows signals to travel faster along axons because depolarization occurs only at myelinated locations. B. It allows signals to travel faster along axons because depolarization occurs only at nonmyelinated locations. C. It bundles the dendrites of adjacent neurons together. D. It increases capacitance across the cell membrane, which helps electrical signals to leave the axons. E. It traps neurotransmitters, increasing their concentratio...