Which of the following is NOT a communicable disease?
A) malaria
B) AIDS
C) tuberculosis
D) tetanus
E) typhoid fever
D
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Which molecule degrades cyclical AMP into AMP?
a. erythropoietin b. adenylate cyclase c. phosphodiesterase d. isomalathion
Energy stored in which of the following substances
is converted by mitochondria to a form usable by the cell? a. water b. organic compounds c. NAD+ d. ATP e. carbon dioxide
Match the scientist(s) on the left with the statement on the right
A) proposed the protein-lipid-protein "sandwich" model of the cell membrane B) proposed the "unit membrane" model based on electron microscopy images of the "railroad track" pattern of membranes C) proposed the fluid mosaic model of the cell membrane D) described the chemical nature of the cell membrane E) created lipid monolayers from solubilized cell membrane lipids F) determined the 3D structure of a membrane protein demonstrating transmembrane segments G) created lipid bilayers from solubilized cell membrane lipids H) demonstrated that a biological membrane is a lipid bilayer 1) Davson and Danielli 2) Gorter and Grendel 3) J. David Robertson 4) Irving Langmuir 5) Unwin and Henderson 6) Charles Overton 7) Singer and Nicolson
A thermal inversion occurs when a warm stagnant air mass traps a cooler air mass containing smog beneath it
Indicate whether the statement is true or false