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USABO Open Exam With 100% Correct Answers 2024

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...

USABO Open Exam 2024 with Verified Answers Graded A. 1. What best describes a nucleosome? A. Region in bacterial cells where DNA is located. B. DNA wrapped around 8 histone cores. C. RNA with protein bound. D. A region in the nucleus where ribosomes are assembled. E. The space between the layers of the nuclear membrane. 2. You observe fly cells that are undergoing meiosis and treat them with a drug that inhibits the separation of parental homologs. At which stage of meiosis do cells trea...

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...

USABO Open Exam 2024 | 100%Correct Answers Verified Latest 2024 Version. 1. 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 le...

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...

USABO Open Exam 2024 | 100% Correct Answers | Verified | Latest 2024 Version

USABO Open Exam 2024 | 100%Correct Answers Verified Latest 2024 Version. 1. 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 le...

Classes of membrane molecules is a marker for the phagocytosis of apoptotic cells Phosphatidylserine Pollen grains are treated with Colchicine in culture Resulting plants are dihaploid and fertile Nyctinasty closing of leaves or flowers at night Epinasty perplexing behavior seen during the flooding of roots of plants Food source of black bread mold (a zygomycete) has been depleted a zygosporangia forms Membranes responsible for respiration in developing bi...

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...