Quiz 2 Flashcards
1
Q
The simplest units of matter are A) Protons B) Electrons C) Neutrons D) Molecules
A
D) Molecules
2
Q
If the atomic number of an element is 8, how many protons does the element contain? A) 4 B) 6 C) 8 D) 10
A
C) 8
3
Q
Substances that release ions in water are called A) Catalysts B) Elements C) Electrons D) Electrolytes
A
D) Electrolytes
4
Q
Ions with a positive charge are referred to as A) Cations B) Anions C) Atoms D) Electrolytes
A
A) Cations
5
Q
Chemicals that resist pH changes are called A) Bases B) Acids C) Enzymes D) Buffers
A
D) Buffers
6
Q
\_\_\_\_\_ are chemical bonds created by the electrical attraction between A) Hydrogen bonds B) Ionic bonds C) Sodium bonds D) Covalent bonds
A
B) Ionic bonds
7
Q
Which of the following is not an example of an inorganic compound? A) Salt B) Glucose C) Water D) Base
A
B) Glucose
8
Q
What reactions breaks molecules into smaller fragments (for example, AB----> A + B)? A) Replacement B) Synthesis C) Metabolism D) Decomposition
A
D) Decomposition
9
Q
Which of the following substances would be the least acidic? A) White wine, pH=3 B) Stomach secretions, pH=1 C) Lemon juice, pH=2 D) Urine, pH=6
A
D) Urine, pH=6
10
Q
Enzymes are organic catalysts that
A) Determine the nature of the products of a reaction
B) Are essential raw materials for a chemical reaction and are converted into some of its products
C) Alter the direction in which a chemical reaction proceeds
D) Increase the speed of a chemical reaction
A
D) Increase the speed of a chemical reaction
11
Q
What is an essential function of epithelial cells?A) Control permeability
B) Produce specialized secretions
C) Provide physical protection
D) All of the above
A
D) All of the above
12
Q
Any solution that has the same osmotic pressure as body fluid is referred to as A) Hypotonic B) Isotonic C) Hypertonic D) Normotonic
A
B) Isotonic
13
Q
Crenation (shrinking) occurs when a blood cell is placed into which of the following solutions? A) Hypotonic B) Hypertonic C) Homotinic D) Isotonic
A
B) Hypertonic
14
Q
The cell's DNA is located in the A) Lysosomes B) Mitochondria C) Nucleus D) Ribosomes
A
C) Nucleus
15
Q
Glucose is passively transported across the cell membrane by binding to a receptor site on a carrier protein in a process called A) Facilitated diffusion B) Facilitated osmosis C) Assisted osmosis D) Assisted filtration
A
A) Facilitated diffusion
