In what part of a cell would you find most of a cell's genetic material?
a) Plasma membrane b) Cytoplasm c) Nucleus d) Mitochondrion e) Centrosom
c) Nucleus
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The steps necessary for hearing include (1) amplification of sound waves, (2) transfer of sound vibrations to fluid pressure waves, and (3) mechanoreception by hair cells of the cochlea. How are the sound vibrations transferred to fluid pressure waves?
A. by the bones of the middle ear B. through the oval window C. by the tympanic membrane D. by the action of the vestibular system
What is the difference between ATP and ADP?
a. ATP can only be used once and cannot be recycled, whereas ADP is the recyclable form of ATP. b. ADP is an enzyme required to convert ATP into energy. c. ADP contains only two phosphates (adenosine diphosphate), whereas ATP contains three. d. By using ADP and a free-floating phosphate, an organism can rebuild its supply of ATP, but ATP never leads to ADP. e. There is no difference
HIV strains may differ by 10% within one person and by 35% in people around the globe. This is due to
A. the fact that HIV targets T cells. B. the fact that HIV inserts its genome into the host genome. C. both cellular and antibody-mediated responses. D. HIV's high rate of mutation. E. the fact that most people do not die from HIV infection.
Please match the descriptions with the correct bacterial genus to test your understanding of curve-shaped bacteria.
A comma-shaped bacterium A) Helicobacter B) Campylobacter C) Vibrio