Activation energy can be described as __________.
A. energy needed to activate an enzyme
B. energy released by a chemical reaction
C. metabolism
D. energy needed to activate the reactants and trigger a chemical reaction
D. energy needed to activate the reactants and trigger a chemical reaction
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Most scientific names are derived from
(a) English. (b) Latin. (c) Italian. (d) French.
Which biochemical pathway fits the data presented?
Assume that a series of compounds has been discovered in Neurospora. Compounds A–F appear to be intermediates in a biochemical pathway. Conversion of one intermediate to the next is controlled by enzymes that are encoded by genes. Several mutations in these genes have been identified and Neurospora strains 1–4 each contain a single mutation. Strains 1-4 are grown on minimal media supplemented with one of the compounds A-F. The ability of each strain to grow when supplemented with different compounds is shown in the table (+ = growth; o = no growth).
media supplement
A) A ? B ? C ? D ? E ? F
B) A ? B ? C ? F ? D ? E
C) F ? B ? C ? D ? A ? E
D) A ? B ? C ? D ? F ? E
E) A ? B ? F ? E ? C ? D
The birth control pill is a mixture of synthetic
a. testosterone and estrogens. b. progesterone and estrogens. c. LH and FSH. d. LH and estrogens. e. compounds of all of these.
What is the term for the loss of genetic variation due to an event that decreases the size of the entire population?
A) gene flow B) genetic drift C) founder effect D) population bottleneck E) selection