One of the major categories of receptors in the plasma membrane reacts by forming dimers, adding phosphate groups, and then activating relay proteins. Which type does this?
A) G protein-coupled receptors
B) ligand-gated ion channels
C) steroid receptors
D) receptor tyrosine kinases
Answer: D
Biology & Microbiology
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Lateral meristem that contributes to the increase in thickness of a stem or root.
Choose the letter of the best match: A. protoderm B. vascular cambium C. apical meristem D. procambium E. ground meristem
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Heterothallic ascomycetes are self-fertile
____________________ Indicate whether the statement is true or false.
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The breakdown of ____ for energy production results in the formation of ammonia as a waste product.
A. carbohydrates B. fats C. proteins D. carbohydrates and fats E. fats and proteins
Biology & Microbiology
At rest, veins hold about ____ percent of the body's blood.
A. 40 B. 50 C. 60 D. 70 E. 80
Biology & Microbiology