Cholesterol ____.
A. has a rigid backbone of four nitrogen rings
B. is the most common steroid in animal tissue
C. is a lipid with a fatty-acid component
D. is needed to inhibit sexual development and maturity
E. is needed to lubricate feathers
Answer: B
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In a given chemical reaction, if the free energy of formation is known for all of the reactants and each of the products, the change in free energy can be calculated for the reaction
Indicate whether the statement is true or false.
Substrate-level phosphorylation
a. occurs during glycolysis. b. requires the presence of oxygen. c. is a precursor for the phosphorylation of glucose. d. is the source for the majority of the ATP produced in aerobic respiration. e. does not occur during the Krebs cycle.
Colonic Fermentation
What will be an ideal response?
What are the results of double fertilization?
A) Egg cell and sperm cell B) Diploid zygote and diploid endosperm C) Embryo sac and pollen sac D) Triploid endosperm and diploid zygote E) A zygote and an embryo