Which of the following is NOT true regarding
coenzymes?
a. NAD+ is an example of a coenzyme.
b. Coenzymes may carry electrons.
c. Coenzymes may be bound to an enzyme.
d. Coenzymes may act as a separate molecule.
e. Coenzymes are metal ions
E
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Researchers have determined that the growth of hormone-responsive breast cancer cells depends upon ____
a. the relative concentrations of ER? and ER? in the tumor cells b. the ability of ER? to stimulate cancer cell growth c. the ability of ER? to inhibit cancer cell growth d. whether DNA binding sites exists for ER?, but not ER? e. the relative concentrations of estrogen and testosterone in breast tissue
Sugary secretions of plants attract various insects as a source of nutrition. In addition to pollination, which of the following can be a benefit for the plant in this relationship?
a. nutrition from the insects when they die near the plant b. cooling effect of being shaded by the insect from the sun c. protection from herbivory d. insects that can keep the plant pruned
The first (capitalized) word of an organism's two-part scientific name denotes the _________.
Fill in the blank(s) with the appropriate word(s).
Which of the following is an advantage that internal fertilization has over external fertilization?
a. protection of gametes from drying b. protection of gametes from relatives c. production of more offspring d. production of more eggs