Prokaryotes can acquire new DNA via transformations, transduction, and which of the following?
a. mitosis
b. meiosis
c. conduction
d. conjugation
d. conjugation
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Which of the following solutes is NOT normally found in the plasma?
A. metabolites, wastes, and hormones B. globulins C. hemoglobin D. ions E. albumin
Sexual reproduction
a. leads to uniform characteristics within a population. b. results in new combinations of genetic traits. c. creates genetic clones. d. requires less tissue differentiation than asexual reproduction. e. produces genetic clones and requires less tissue differentiation than asexual reproduction
An atom of nitrogen attracts electrons more strongly than an atom of hydrogen. In an ammonia molecule (NH3), which of the following best describes the electrical charge of the individual atoms?
A) The nitrogen is slightly more negative. B) The nitrogen is slightly positive. C) The hydrogens are strongly negative. D) The nitrogen becomes neutral. E) Charges balance out and none of the atoms has any charge.
Some people can detect PTC, a bitter compound found in broccoli and Brussels sprouts, whereas others cannot. Which of the following is the most likely explanation for this observation?
A. The G protein pathway that alters the conformation of the sodium channels is defective. B. Chemoreceptors specific for PTC are not expressed. C. Too few sodium channels are present in the taste receptors. D. Neurotransmitter release from these taste receptors is impaired.