Which of the following regarding enzymes is true?
a. Enzymes are lipids.
b. Enzymes are carbohydrates.
c. Enzymes are proteins.
d. Enzyme are nucleic acids.
c. Enzymes are proteins.
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Given the diagram below, assume that a G1 chromosome (left) underwent one round of replication in 3H-thymidine and the metaphase chromosome (right) had both chromatids labeled
Which of the following replicative models (conservative, dispersive, semiconservative) could be eliminated by this observation?
Which one of the following tissues can respond to the environment by generating electrical signals?
A) dermis B) nervous C) muscle D) epithelial E) connective
The development of secondary sexual characteristics is due to
A) decreased levels of GnRH. B) increased levels of estrogen or testosterone. C) increased levels of progesterone. D) decreased levels of estrogen or testosterone. E) decreased LH levels.
Which of the following is incorrect about Intelligent Design?
A. It is a religious viewpoint. B. It has been overwhelmingly rejected by the scientific community. C. Some people want it taught in schools along with evolution. D. It is scientifically testable. E. It is the same as Creationism.