Which of the following hormones stimulates ovulation?
a. gonadotropin-releasing hormone
b. luteinizing hormone
c. follicle-stimulating hormone
d. estrogen
e. progesterone
b
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Isoelectric focusing separates proteins based on the pH at which they are electrically ________.
Fill in the blank(s) with the appropriate word(s).
Is a ribozyme a true enzyme?
a. Yes, because it is a catalyst. b. No, because it is not a protein. c. No, because it cannot catalyze a reaction. d. Yes, because it can synthesize a protein. e. No, because it doesn't require cofactors.
________ is the genetic material for all cellular organisms and some viruses.
A. Protein B. DNA C. Chromatin D. RNA
Most components of energy conversion systems evolved very early; thus, the most fundamental
aspects of energy metabolism tend to be: a. quite different among a diverse group of organisms. b. very different among plants and animals. c. the same among the autotrophs but different among heterotrophs. d. the same among prokaryotes but different among eukaryotes. e. very similar in a wide range of different organisms.