Download Midterm 1 sample-multiple choice section File

Biology 260, Fall 2008
Exam 1 / part 1/Tonini
Name ________________________________
Choose the one best answer for each question and mark your scantron.
When completed please turn in your scantron, test questions and written answers.
1. Blood plasma could be defined as
a. whole blood b. whole blood minus clotting factors c. intracellular fluid of blood
d. extracellular fluid of blood
e. whole blood minus proteins
2. Enzymes are usually
a. carbohydrates
b. proteins
3.
c. lipids
d. nucleic acids
Boiling most enzymes that normally function in our body will result in
a. lowering the activation energy b. denaturing the enzyme
c. increasing the reaction rate
d. slightly decreasing the reaction rate
4.
An enzyme that is in the environment of our gastric juice would have the highest activity at
what pH?
a. 14
b. 7
c. 7.35
d. 2
5. 500 milliliters is equivalent to
a. 5 micrometers b. .5 Liters c. 5 liters
d. .5 meter
e. 500 centimeters
6. A red blood cell will crenate with excess water, when placed in a(n) _____ solution.
a. hypotonic
b. isotonic
c. hypertonic
d. all of the proceeding.
7.-9. Match the quantities:
7.
32 degrees F
8.
37 degrees C
9.
100 degrees C
a. human body temperature
b. boiling point of water
c. room temperature
d. freezing point of water
10. Homeostasis is the condition in which the body maintains:
a. all systems at precise, preset states. b. a relatively stable internal environment, within limits.
c. a static state with no deviation from preset points. d. a dynamic state within a unlimited range.
11. The genetic information of the cell is contained in the
a. nucleus. b.endoplasmic reticulum.
c. golgi.
d.lysosomes.
12. A reasonable value for serum potassium is
a. 95 mEqu/L b. 5 mEqu/L c. the same as intracellular values
d. 145 mEq/L
13. Which of the following are part of ECF?
a. Interstital fluid
b. Plasma c. intercellular fluid d. all of these
14. Materials may be able to move all the way from the nucleus to the outside of the cell through
a channel system known as the
a. canaliculi.
b.endoplasmic reticulum.
c.ribosomes.
d.lysosomes.
15. The energy for the processes of a cell is mainly produced by the
a. mitochondria.
b.lysosomes.
c.nucleus.
d.
ribosomes.
16. A good example of a positive feedback mechanism would be:
a. body temperature regulation. b. regulating glucose levels in the blood.
c. enhancement of labor contractions by oxytocin
d. blood calcium level regulation.
17. If a poison such as cyanide stopped the production of ATP, which of the following transport
processes would cease?
a. movement of Na+ out of the cell
b. movement of K+ out of the cell
c. Na/K pump
d. all of the above
18. Which of the following would be considered macromolecules in the carbohydrate family?
1.. glycogen
2. protein
3. starch
4. triglycerides
5. steroids
6. RNA
a. all of the above
b. 4, 1, and 6 only
c. 3, 5, and 2
d. 1 and 3 only
19-21 Match the description with the molecule
19. storage form of sugar and is readily hydrolyzed
20. a steroid that is a component of cell membranes
21. a globular protein found in human blood
22.
a. sucrose
b. DNA
c. glycogen
d. cholesterol
e. hemoglobin
Which of the following is an active transport system?
a. oxygen and carbon dioxide moving in and out of the lungs to the air
b. solvent moving from a low solute environment to a high solute environment
c. water moving out of a red blood cell when place in a highly concentrated salt solution
d. sodium being pumped out of the cell
23. Movement of a molecule against a concentration difference is characteristic of
a. simple diffusion. b. facilitated diffusion. c. osmosis. d. active transport.
24. The method of movement that requires the expenditure of ATP molecules is
a. simple diffusion. b. facilitated diffusion.
c. osmosis. d. active transport.
25. White blood cells use _____ to devour disease agents invading your body.
a. diffusion b. bulk flow c. osmosis d. phagocytosis
26. Mitochondria convert energy stored in _____ to forms that the cell can use, principally ATP.
a. water b. organic carbon compounds
c. chlorophyll d. carbon dioxide
27. The rate of diffusion occurs more rapidly
a. with higher concentration gradients.
b. at higher temperatures.
molecules are involved. d. all of the above. e. none of the above.
c. if smaller
28. Which of the following is the major cation in ECF?
a. calcium b. chloride c. sodium d. potassium
29.A metabolic disorder called phenylkeonuria (PKU) is due to an abnormal recessive gene. Only
homoxzygouse recessive individuals exhibit this disorder. What genotype best demonstrates this
conditon?
a. pp
b. PP
c. Pp
d. X pY
30. Because water molecules have two distinct ends, each with a partial electrical charge, water is said to be
a. ionic
b. liquid
c. polar
d. neutral
e. confusing
31.Living things possess a genetic system that is based on a molecule that contains coded information.
This molecule is
a. deoxiribophosphotase
b. adenosinetriphosphate c. creatine phosphate
d. deoxyribonucleic acid
e. nucleolus
32. Which of the following are functions of membrane proteins?
a. intercellular joining b. cell-cell recognition c. transport
d. receptors for signal transduction e. all of these