USABO Practice exam 2024 with 100% correct answers

What enzyme does HIV use to convert RNA to DNA? correct answersReverse Transcriptase The promoter region of a prokaryotic gene is located ______ to the gene and is the binding site for ______. correct answers5'...RNA polymerase Which of the following is TRUE of prokaryotes? I. Simultaneous transcription and translation II. Presence of intron sequences III. Circular DNA correct answersI and III only Integral transmembrane proteins are proteins imbedded in the cell membrane. Which of the following amino acids would you MOST expect to find in the transmembrane region of such proteins? correct answersTryptophan When the base composition of DNA from bacterium Mycobacterium tuberculosis was determined, 18% of the bases were found to be adenine. What is the G + C content in M. tuberculosis? correct answers64% The frequency of individuals affected with an autosomally recessive inherited disorder is 1 in 4. Assuming that the population affected by this disease is in Hardy-Weinberg equilibrium, what is the proportion of carrier individuals in this population? correct answers50% The velocity of action potential conduction across a nerve axon is increased by the presence of the myelin sheath. In the peripheral nervous system, what cell myelinates the axon? correct answersschwann cell The cell bodies of afferent (sensory) nerves involved in somatic reflexes are located in the correct answersDorsal root ganglion