Methanogens can live only in ________ environments.
A. microaerophilic
B. aerobic
C. anaerobic
D. All of the choices are correct.
Answer: C
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Which of the following junctions are important for cell signaling?
A. adherins junctions B. gap junctions C. plasmodesmata D. desmosomes E. All of the choices are correct.
The microbiome considers
A) DNA from microorganisms in the human body. B) human DNA in microorganisms. C) all DNA that is too small to be seen in a light microscope. D) genes that contribute to or control metabolism.
Competitive inhibition of enzymes occurs
A. when a substance other than the substrate binds at the active site of an enzyme. B. when the product, or other substances, instead of the reactant, bind to the active site of the enzyme. C. when a substance binds to an enzyme at a site away from the active site. D. by blocking the production of an enzyme. E. when the product, instead of the reactant, of a reaction binds to the active site.
What fat is the building block for cell membranes?
a. trans fatty acids b. sterols c. phospholipids d. triglycerides e. cholesterol