It appears that the most important senses involved in human sexual attraction are
A. hearing and touch.
B. sight and smell.
C. taste and smell.
D. touch and smell.
B. sight and smell.
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The following are major events in expression of a gene for insulin, which is secreted outside of certain
mammalian cells. Place these events in order, from earliest to latest. 1: binding of a release factor 2: binding of signal recognition particle (SRP) 3: binding of transcription factors 4: removal of introns 5: scanning of mRNA
a. 4?2?3?1?5 b. 1?4?3?2?5 c. 5?2?1?4?3 d. 3?4?5?2?1 e. 3?2?1?5?4
Two groups of your colleagues are arguing over the amount of energy required for a beaker full of Substance X to complete an endergonic reaction. The first group insists that only the activation energy for a single reaction is necessary, which will release at least enough energy to start a second and third reaction, until all the reactants are consumed. The second group strongly disagrees, insisting that the energy required is equal to the activation energy of a single set of reactants, multiplied by the number of reactant sets in that volume of Substance X. Which group is correct?
a. Group 1 is correct, if and only if the energy released by each set of reactants is sufficient to activate a secondary reaction, after accounting for entropy. b. Group 2 is correct; the amount of energy required must equal the activation energy of all of the reactants in the beaker of Substance X. c. Group 2 is half right; endergonic reactions absorb energy, so free energy, activation energy, and entropy losses for all reactants must be included. d. Neither group is correct; endergonic reactions occur spontaneously, and the reaction has likely been completed unnoticed during this argument.
The stramenopiles include the
a. oomycotes. b. brown algae. c. Sargassum and Saprolegnia d. diatoms. e. all of these.
Two parents have the genotype Gg for a genetic disorder caused by a dominant allele. What is the chance that any of their children will inherit the disorder?
A.) 25% B.) 50% C.) 75% D.) 100%