Release of leptin by fat cells and the firing of the stretch receptors of the stomach will stimulate the satiety center of the brain.
True or False
Answer is true.
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You have been a sample of Mimivirus, which has the largest capsid diameter of all currently known viruses (600 nm) and is hexagon shaped (icosahedral). Based on your knowledge of microscopes, what would you be able to see/determine about mimiviral structure using each of the following microscopes?
a. simple compound (light) microscope b. fluorescent microscope using fluorescently labeled antibodies to a novel capsid protein c. magnetic resonance force microscope
Explain why HIV becomes resistant so quickly when a single drug is used therapeutically
A. The virus is an RNA genome virus-by using host RNA polymerase to directly copy the genome to make more virus particles, there's no proofreading capability. This leads to a high rate of mutation of the viral genome and increased chance for drug resistance. B. HIV utilizes reverse transcriptase to make a cDNA version of its RNA genome. This polymerase is "'sloppy," with a high rate of error and lack of a proofreading capability. This leads to a high rate of mutation of the viral genome and increased chance for drug resistance. C. HIV synthesizes a protein enzyme that directly cleaves anti-HIV drugs, giving it a characteristically high rate of resistance to a single drug type. D. HIV is constantly changing its genetic structure by swapping genetic elements with other virus strains. This leads to a high rate of mutation of the viral genome and increased chance for drug resistance.
In glycolysis, for each molecule of glucose oxidized to pyruvate _____
A) two molecules of ATP are used and two molecules of ATP are produced. B) two molecules of ATP are used and four molecules of ATP are produced. C) four molecules of ATP are used and two molecules of ATP are produced. D) two molecules of ATP are used and six molecules of ATP are produced.
The phytochrome Pr
A) is the active form of Pfr. B) absorbs far-red light. C) is inactive and absorbs red light. D) is very unstable.