USABO Open Exam | Question With 100% Correct Answers | Verified | Latest Version 2024
USABO Open Exam | Question With 100% Correct Answers | Verified | Latest Version 2024 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 concentrations in the synaptic cleft. Correct Answer: B Which type of cytoskeletal fiber is the primary building block of eukaryotic cilia and flagella? A. Actin microfilaments. B. Intermediate filaments. C. Keratin. D. Microtubules. E. RNA. Correct Answer: D. Microtubules. Which of the following human cell types contains the LEAST amount of RNA involved in splicing? A. Lymphocytes B. Lymphoblasts C. Erythrocytes D. Erythroblasts E. Hepatocytes Correct Answer: C. Erythrocytes Antimicrobial drugs, also known as antibiotics, inhibit the growth of bacteria by targeting cellular components present in bacteria. Which of the following cellular components is NOT a valid antimicrobial drug target? A. Centrosome. B. Ribosome. C. Cell wall. D. RNA polymerase.
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usabo
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usabo open exam question with 100 correct answe
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why is myelin important in the nervous system
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which type of cytoskeletal fiber is the primary bu
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which of the following human cell types contains