What do fats, steroids, and waxes have in common?
What will be an ideal response?
Low solubility in water
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Antidiuretic hormone (ADH) functions at the cellular level by _____
A) stimulating the reabsorption of glucose through channel proteins B) triggering the synthesis of an enzyme that makes the phospholipid bilayer more permeable to water C) causing membranes to include more phospholipids that have unsaturated fatty acids D) causing an increase in the number of aquaporin molecules of collecting duct cells E) decreasing the speed at which filtrate flows through the nephron, leading to increased reabsorption of water
Chaperone-type proteins that stabilize other proteins in response to environmental stresses such as salinity, drought,
heat, and cold are ____.
a. systemins b. phytoalexins c. PR proteins d. R genes e. heat-shock proteins
In adaptive immune responses, which cell type is capable of acting as an antigen-presenting cell?
a. T cell b. monocyte c. eosinophil d. B cell e. basophil
An unknown bacterial species is recovered from a sick patient's digestive tract. It has a membrane outside the cell wall that contains toxic lipids. This observation indicates that
A) the infection should be relatively easy to control with common antibiotics, because the pathogen is a gram-positive species. B) the infection should be relatively easy to control with common antibiotics, because the pathogen is a gram-negative species. C) the infection may be quite threatening and difficult to control, because the pathogen is a gram-positive species. D) the infection may be quite threatening and difficult to control, because the pathogen is a gram-negative species.