BIOL 1001 Chapter : Biology Quiz Ch 2
1.
1. The ingredient label on a container of shortening indicates partially hydrogenated
vegetable oil." This means that during processing the number of carbon-carbon double bonds
in the oil was reduced. What is the result of decreasing the number of double bonds?
a. The oil now has a lower melting point.
b. There are more "kinks" in the fatty acid chains, reducing the membrane density.
c. The fatty acid is modified from a diglyceride into a triglyceride.
d. The oil now contains a higher percentage of carbohydrate.
e. The oil is now more likely to be solid at room temperature.
2.
2. Enzymes:
a. reduce the energy released in a reaction by one of four different mechanisms.
b. can only catalyze energy-releasing reactions.
c. can only catalyze reactions that require an input of energy.
d. are always consumed by catalyzing a reaction.
e. None of the above.
3.
3. Which of the following phenomena is most likely due to the high specific heat capacity of
water?
a. A lizard, called the "Jesus lizard," can run across the surface of liquid water for
short distances.
b. Lakes and rivers freeze from the top, not the bottom.
c. Adding salt to snow makes it melt.
d. The temperature of the Santa Monica Bay, off the coast of Los Angeles, fluctuates
less than the air temperature throughout the year.
e. All of the above are due to the high specific heat capacity of water.
4.
4. One molecule of water consists of:
a. one atom of oxygen covalently bonded to two atoms of hydrogen via a shared pair of
electrons.
b. one atom of oxygen bound to two atoms of hydrogen via ionic bonds.
c. one atom of oxygen bound to two atoms of hydrogen via van der Waals bonds.
d. one atom of oxygen bound to two atoms of hydrogen via hydrogen bonds.
e. one atom of oxygen covalently bonded to two atoms of hydrogen via one shared
electron.
5.
5. Lipids and carbohydrates are composed of the same elements: carbon, hydrogen, and
oxygen. How do lipids and carbohydrates differ?
a. Lipids have more hydrogen relative to oxygen than do carbohydrates.
b. Lipids and carbohydrates have different functions.
c. Lipids don't dissolve easily in water, while carbohydrates do.
d. Lipids do not chain together to form larger molecules, while carbohydrates do.
e. All of the above are correct.
6.
6. A partial sequence of a molecule is "AACTGCT." The molecule is:
a. a polysaccharide.
b. a protein.
c. a nucleic acid.
d. a triglyceride.
e. an oligosaccharide.
7.
7. In contrast to the ______________________________ that lead to ionic bonds, covalent
bonds form when __________________________.
a. sharing of neutrons; there is a complete transfer of electrons
b. complete transfer of electrons; two atoms share one or more pairs of inner-shell
electrons
c. change in atomic number; the atomic number remains unchanged
d. sharing of electrons; there is a complete transfer of electrons
e. complete transfer of electrons; two atoms share one or more pairs of outer-shell
electrons
8.
8. In the chemical formula 3H2O, how many atoms are there of each element?
a. 2 hydrogen and 1 oxygen
b. 5 hydrogen and 3 oxygen
c. 6 hydrogen and 3 oxygen
d. 3 hydrogen and 3 oxygen
e. 3 hydrogen and 1 oxygen
9.
9. Picture the DNA double helix as a ladder and pick from the selection below the
INCORRECT corresponding analogy.
Document Summary
The ingredient label on a container of shortening indicates partially hydrogenated vegetable oil. " This means that during processing the number of carbon-carbon double bonds in the oil was reduced. What is the result of decreasing the number of double bonds? a. The oil now has a lower melting point. b. Which of the following phenomena is most likely due to the high specific heat capacity of water: a lizard, called the "jesus lizard," can run across the surface of liquid water for short distances. b. Lipids and carbohydrates are composed of the same elements: carbon, hydrogen, and oxygen. A partial sequence of a molecule is "aactgct. " The molecule is: a. a polysaccharide. b. a protein. c. a nucleic acid. d. a triglyceride. e. an oligosaccharide: 7. In the chemical formula 3h2o, how many atoms are there of each element? a. Picture the dna double helix as a ladder and pick from the selection below the.
