A researcher is assessing the expression of a certain protein in cells. This protein appears as a "web" in the cytoplasm of cells. The protein is likely a component of:
a. the basal lamina.
b. cell junctions.
c. All of these choices are correct.
d. the extracellular matrix.
e. the cytoskeleton.
Ans: e. the cytoskeleton.
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The excretory organs of different organisms are extremely varied. What do all excretory organs have in common?
A. a filtration system that results in a filtrate that is more concentrated than the body fluids B. a filtration system that filters nitrogenous waste from the body fluids C. a filtration system that relies on active transport to alter initial osmolarity of the filtrate D. a filtration system that relies on extensive tubules with high surface area-to- volume ratio to remove wastes
The most widely used ecoregion system was developed by conservation scientists of the ____
a. US Department of Agriculture b. Environmental Protection Agency c. International Union for Conservation of Nature and Natural Resources d. World Wildlife Fund e. Intergovernmental Panel on Climate Change
Use of succinylcholine as an anaesthetic is very dangerous for people with a genotype for the fastacting
form of the enzyme serum cholinesterase Indicate whether the statement is true or false.
Autoclaves are designed to kill which of the following heat-resistant microbes?
A) endospores B) prions C) vegetative bacterial and fungal cells D) viruses