1. Which of the following levels of biological organization contains the most cells?
a. an organism
b. an organ system
c. an organ
d. a tissue -> D was my answer
6. The pH of soda is fairly acidic. Even after you drink several sodas, the pH of your blood will not fluctuate much. This is an example of
your body's ability to:
a. adapt
b. maintain homeostasis -> B was my answer
c. perform metabolism
d. respond to stimuli
18. The living organisms in this room compose a(n):
a. biosphere
b. community
c. ecosystem
d. population -> D was my answer
19. It is the largest and most diverse group:
a. Community -> A was my answer
b. Ecosystem
c. Population
d. Species
36. Your roommate is experiencing heartburn and asks you to purchase her an antacid. Chemically speaking, you know that the antacid will help eliminate her pain because:
a. it has a low H+ concentration to increase the pH in her digestive tract.
b. it has a low pH to balance the acidity in her digestive tract. -> B was my answer
c. it is a buffer and will prevent the pH in her digestive tract from changing.
d. it is probably high in H+.
31. Water:
a. Has a high heat capacity and therefore helps maintain a constant body temperature -> A was my answer
b. Has a low heat vaporization and therefore helps prevent overheating of the body
c. Is a nonpolar molecule and therefore an excellent solvent
d. Makes up about 25% of human body
46. Enzymes are one type of protein. They function to
a. build strength
b. form hormones
c. repair tissue
d. speed reactions -> D was my answer
49. A researcher suspects that the food in an ecosystem may have been contaminated with radioactive phosphates over a period of months. Which of the following substances could be examined for radioactive phosphate to test the hypothesis?
a. The amino acids within proteins produced by organisms living in the area
b. The DNA of the organisms in the area -> B was my answer
c. The starch produced by plants in the area
d. All of the above
1. Which of the following is NOT a fundamental characteristic of life?
A. ability to interact with others
B. ability to regulate the internal environment of the life form
C. ability to utilize energy derived from the external environment -> C was my answer
D. smallest unit of living things are called atom
7. Which statement is NOT true about elements?
A. An element cannot be broken down into substances with different properties
B. An element is always consists of more than one atoms -> B was my answer
C. There is only one kind of atom(s) in each type of element
D. All atoms of an element contain the same number of protons
17. Compounds form due to:
A. the shape of the individual atoms
B. a drive toward solubility
C. Transfer or sharing of electrons -> C was my answer
D. an attraction between neutrons
20. The lipids of the cell membrane and the lipids found in butter and vegetable oil differ in which of the following?
A. the number of fatty acids attached to the glycerol molecule
B. the glycerol molecule
C. the carbon to carbon bonds -> C was my answer
D. lipids of the cell membrane do not have hydrophobic sections of the molecule
36. Which of the following is not a characteristic of an Enzyme?
A. reduces the requirement of activation energy
B. specific for any particular reaction -> B was my answer
C. Increases the requirement of energy in a reaction
37. Saturated fatty acids and unsaturated fatty acids differ in:
A. the number of carbon-to-carbon bonds.
B. the consistency at room temperature.
C. the number of hydrogen atoms present.
D. all of the choices are differences between saturated and unsaturated fatty acid. -> D was my answer