Download Fall 08 – BIOL 1000 – 1st lecture test – 12:30 Use the information

Fall 08 – BIOL 1000 – 1st lecture test – 12:30
Use the information below to answer the first 4 questions:
A potassium atom (K+) has an atomic # of 19, a positive charge, and an atomic mass of
37.
1. The number of electrons in this atom could be which of the following?
A. 20
B. 19
C. 18
D. none of the above
2. How many neutrons would this atom have?
A. 18
B. 19
C. 20
D. cannot be determined from the information above
3. How many protons would this atom have?
A. 18
B. 19
C. 20
D. cannot be determined from the information above
4. The above atom would be an example of a/an:
A. ionic bond
B. polar covalent molecule
C. ion
D. organic molecule
5. Chitin is an example of a:
A. carbohydrate
B. protein
C. nucleic acid
D. lipid
6. The monomers that make up chitin are:
A. nucleotides
B. amino acids
C. fatty acids
D. monosaccharides
7. Which of the following is a characteristic of all living organisms?
A. have nuclei within their cells
B. have organelles
C. have DNA
D. all of the above
8. The molecule found below is a/an:
A. carbohydrate
B. amino acid
C. nucleotide
D. lipid
9. What are the monomers that make up the nucleic acids DNA and RNA?
A. amino acids
B. monosaccharides
C. nucleotides
D. fatty acids
10. What do all saturated fatty acids share in common?
A. a carboxyl group
B. all carbons are bonded to other carbons with a single bond
C. all contain hydrogen D. all of the above
11. Lactose (a disaccharide) is formed when glucose and galactose (monosaccharides) are
bonded together and water is given off. This process is an example of:
A. hydrolysis
B. polar bonding
C. hydrogen bonding
D. dehydration synthesis
12. In the scientific method, after you observe something, what is the next step?
A. design an experiment
B. draw a conclusion
C. form a hypothesis
D. collect data
13. If you go to the doctor, the best thing for your health is for:
A. your LDL (low density lipoprotein) count to be high and your HDL (high density
lipoprotein count) to be low
B. your LDL to be low and your HDL to be high
C. both LDL and HDL count to be high
D. both LDL and HDL count to be low
14. Which of the following is true of fats?
A. are hydrophilic
B. are composed of amino acids
C. used for energy storage
D. all of the above
15. (T or F) You and I can digest cellulose.
16. In ammonia (NH3), nitrogen is more electronegative than the hydrogens, so the
nitrogen end of the molecule is more negative and the hydrogen end more positive. This
is an example of a/an
bond.
A. hydrogen
B. polar covalent
C. ionic
D. nuclear
17. In magnesium oxide, 2 electrons leave the magnesium atom and are accepted by the
oxygen atom. This exchange of electrons gives the oxygen atom a negative charge and
the magnesium atom a positive charge. This difference in charge holds the two atoms
together. This is an example of a/an
bond.
A. hydrogen
B. polar covalent
C. ionic
D. nuclear
18. Sulfur has an atomic # of 16. How many electrons does a neutral sulfur atom have in
its outer shell?
A. 4
B. 8
C. 2
D. 6
19. How many electrons does a neutral sulfur atom need to add to fill its outer shell?
A. 0
B. 2
C. 4
D. 9
20. In the eukaryotic cell, where is DNA found?
A. the ribosome
B. the golgi complex
C. the nucleus
D. all of the above
If NaOH is dropped into solution it will break apart into Na+ and OH- ions. The OH- ions
will then combine with hydrogen ions to form water.
21. NaOH is a/an:
A. acid
C. organic molecule
B. base
D. fatty acid
22. When NaOH is dropped into a solution the pH of that solution:
A. increases
B. decreases
C. stays the same
D. becomes 0
23. Your blood has a pH of around:
A. 7.4
B. 1.2
C. 11.1
D. 3.6
24. (T or F) Animal cells have a cell wall and a cell membrane.
25. This organelle is responsible for detoxifying harmful substances in the cell:
A. golgi complex
B. nucleus
C. mitochondria
D. smooth endoplasmic reticulum
26. Actin and myosin are examples of
, which are parts of the cytoskeleton
that allow your muscle cells to change shape.
A. microfilaments
B. intermediate filaments
C. microtubules
D. lesser filaments
27. Which of the following occurs in plastids?
A. proteins are produced
B. proteins are shipped to their final destination
C. DNA is produced
D. photosynthesis takes place
28. Which of the following is a function of proteins in the cell membrane?
A. receptor for chemicals
B. channel between cells
C. identification tag
D. all of the above
29. Identify the functional group below:
A. carboxyl
C. amino
B. phosphate
D. acetate
30. The cell membrane is composed of a double layer of:
A. proteins
B. carbohydrates
C. nucleic acids
D. phospholipids
31. As the concentration of H+ ions in a solution increases, the pH:
A. increases
B. decreases
C. stays the same D. increases then decreases
32. Carbon 12 has 6 protons and 6 neutrons. Carbon 14 has 6 protons and 8 neutrons.
Carbon 14 is a/an:
A. ion
B. polar molecule
C. isotope
D. anion
33. Carbon 14 is radioactive, this means that the movement of
energy.
A. protons
B. electrons
C. neutrons
D. all of the above
are giving off
34. When a protein's form or function is changed by exposure to extreme temperatures or
pHs, this is referred to as:
A. hydrolysis
B. being denatured
C. dehydration synthesis
D. polymer reduction
35. Which of the following is a characteristic of steroids?
A. composed of amino acids
B. composed of nucleotides
C. have 4 linked carbon rings
D. are hydrophilic
36. Which of the following would your body use to store energy?
A. cellulose
B. starch
C. glycogen
D. RNA
37. These organelles recycle other organelles.
A. lysosomes
B. golgi complex
C. smooth endoplasmic reticulum
D. ribosomes
38. (T or F) The cell membrane is hydrophilic.
39. Functional groups are the groups of atoms that:
A. are polar
B. are negatively charged
C. are usually involved in chemical reactions
D. always contain carbon
40. Of the following, which would be the most perilous to your
health?
A. eating the “krispy kreme” bacon cheeseburger
A. feeding a barracuda with your teeth
A. wrestling the gigantic lobster
A. plucking the world’s longest ear hair