Active transport pumps typically move solutes from areas of ____ concentration to areas of ____ concentration
a. high; low
b. low; high
c. neutral; high
d. neutral; low
e. low; neutral
ANSWER: b
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As you and a friend are entering a chemistry laboratory at your university, you see a sign that states: DANGER—RADIOACTIVE ISOTOPES IN USE. Your friend is an accounting major and has not had any science courses yet. She asks you what a radioactive isotope is and you respond correctly with:
A. Radioactive isotopes are atoms that are unstable and as a result emit energy in a process called radioactive decay. B. Radioactive isotopes are atoms that are stable and as a result emit energy in a process called radioactive decay. C. Radioactive isotopes are atoms that are stable and as a result only emit energy if they are exposed to higher temperatures. D. Radioactive isotopes are atoms that are unstable but unless actively disturbed by some chemical process will remain intact and pose no problems.
The parts of a flower most likely to have distinctive colors, patterning, and shapes for attracting pollinators are the
a. petals b. carpels c. stamens d. receptacles e. sepals
What is a fundamental difference between circular and linear metabolic pathways?
a. Only circular metabolic pathways require a net input of energy to continue. b. Linear metabolic pathways do not require facilitation by enzymes to begin. c. The reactants of linear metabolic pathways do not include their reactants. d. Linear metabolic pathways create polymer chains without carbon rings.
A condensed, female X chromosome is called a
a. Barr body. b. Morgan sphere. c. SRY gene. d. karyotype. e. linkage map.