Bio 101 Biology
Stavney
Name
Lecture Exam III
100 points total. Directions:
1. First, write your name at the top of this exam.
2. On a computerized answer form, fill out your name, date, class, and exam number
3. Write the first three letters of your last name across the back top part of the computer form.
4. Answer all the multiple-choice, true-false questions directly on a computerized answer form,
filling in the rectangles with a #2 pencil that correspond to the correct answers.
5. Complete the short answer sheet at the back of the exam, including putting your name on that
sheet.
6. Separate the short answer sheet from the rest of the questions, fold it in half lengthwise, and
write the first three letters of your last name in the blanks provided.
7. Insert your computer form into the folded sheet.
8. Insert the folded short answer sheet in between the pages of these questions.
9. Submit your exam
Completed exam
for student Joe Smith
1. Water molecules creep along thin spaces, such as when water is absorbed by a paper towel. This
property is known as:
a. high heat capacity
b. capillarity
c. adhesion
d. cohesion
e. surface tension
2. A neutral solution would have a pH of about:
a. 2
b. 5
c. 7
d. 8
e. 13
3. Carboxyl groups (--COOH) are:
a. highly charged
b. non-polar
c. acidic
d. basic
e. known for carrying energy
4. A "peptide", or monomer of protein, always contains which functional groups?
a. sulfhydryl and hydroxyl
b. carboxyl and hydroxyl
c. phosphate and amino
d. amino and ketone
e. carboxyl and amino
-----------------------------------------------------------------------------------------------------------------------TRUE/FALSE Answer "a" if true and "b" if false.
5. The bonds within a single water molecule are all covalent bonds.
BIO 160
Biology Lecture Exam III v1
pg 1
TRUE/FALSE, continued
6. A non-polar substance is not soluble in oil.
7. An electrically unbalanced atom has an equal number of protons and electrons.
8. An isotope is a version of an atom for an element which has extra neutrons.
9. Hydrogen bonds involve the sharing of electrons.
10. Fatty acids have an amino functional group at one end of the molecule.
-----------------------------------------------------------------------------------------------------------------------11. Phosphate groups are:
a. neutral in charge
b. non-polar
c. oil soluble
d. basic
e. known for carrying energy
12. Nucelotides are found in:
a. butter
b. salad oil
c. table sugar
d. chromosomes
e. proteins
13. Which of the following is true about a triglyceride whose fatty acid "tails" are mostly saturated?
a. The triglyceride has few or no inflexible kinks in its "tails"
b. The triglyceride is liquid at room temperature
c. The triglyceride has many double carbon (C=C) bonds
d. The triglyceride could act as a chemical messenger
e. The triglyceride could be found as a part of cell membranes
14. The monomers of carbohydrates are:
a. fatty acids and glycerol
b. nucleotides
c. monosaccharides
d. amino acids
e. peptides
15. Plants store their excess glucose molecules in the form of:
a. cellulose
b. starch
c. triglycerides
d. glycogen
e. chitin
BIO 160
Biology Lecture Exam III v1
pg 2
16. Which of the following is a polysaccharide?
a. fructose
b. sucrose
c. DNA
d. oil
e. cellulose
17. The function of murein/peptidoglycan in living things is:
a. energy storage
b. chemical messaging (hormone)
c. structural support
d. storage of genetic information
e. movement/motility
18. Most of the polysaccharides found in living things are built of monomers of:
a. nucleotides
b. fructose
c. glucose
d. sucrose
e. amino acids
19. Chlorophylls:
a. are used in the synthesis of amino acids
b. consist of four rings
c. are used for insulation and energy storage
d. are used as light-catching molecules
e. are used for structural support
20. Peptide bonds are:
a. covalent bonds
b. ionic bonds
c. hydrogen bonds
d. disulfide bonds
e. polar/non-polar attractions
21. The biological role of cholesterol is:
a. keeping cell membranes fluid and flexible
b. chemical messaging (hormone)
c. speeding up chemical reactions
d. structural support of the cell
e. storing energy
22. Fatty acids and glycerol are the monomers used to make:
a. DNA and RNA
b. polysaccharides
c. triglycerides
d. protein
e. starch
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Biology Lecture Exam III v1
pg 3
23. Which of the following is TRUE about DNA and RNA?
a. DNA is made of one chain of nucleotides while RNA has two chains of nucleotides
b. DNA and RNA have the same kind of sugar molecule in their nucleotides
c. DNA and RNA are both involved in storing energy
d. DNA a straight molecule while RNA is a helical molecule
e. DNA has hydrogen bonds in its structure while RNA does not
24. Light, water, and carbon dioxide is converted into sugar and oxygen in the:
a. Golgi Body
b. chloroplast
c. smooth endoplasmic reticulum
d. rough endoplasmic reticulum
e. mitochondrion
25. Cell membranes are made primarily of
a. amino acids
b. cholesterol
c. phospholipids
d. carbohydrates
e. microtubules
26. The biological molecule shown at the right is used in
human bodies as a chemical messenger. It is a(n):
a. oil
b. phospholipid
c. nucleotide
d. amino acid
e. steroid
27. An animal cell placed into a hypertonic solution will:
a. shrink
b. swell
c. remain the same
d. explode
e. you can't tell from this information alone
28. Which of the following substances is held together with covalent bonds?
a. table sugar (sucrose)
b. water
c. protein
d. table salt (sodium chloride)
e. oxygen gas
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Biology Lecture Exam III v1
pg 4
29. Leaves of plants are green because:
a. they absorb green light
b. green is the best color light for photosynthesis
c. they reflect green light
d. they are actually black but only seem to be green
e. they reflect red and blue light
30. What are the two major groups of reactions in photosynthesis called?
a. glycolysis and the Calvin Cycle
b. Calvin Cycle and light reactions
c. Krebs Cycle and Calvin Cycle
d. light reactions and Calvin Cycle
e. Calvin Cycle and electron transport chain
31. Which of the following molecules is responsible for allowing substances to easily pass through a cell
membrane?
a. proteins
b. cholesterol
c. phospholipids
d. carbohydrates
e. microtubules
32. NADP+ is a molecule that:
a. carries electrons in plants
b. carries electrons in all organisms
c. carries energy in the form of a phosphate
d. turns into water in metabolism
e. allows ATP to be made
33. Where in a eukaryotic cell would you expect to find sugar being broken down to make ATP?
a. mitochondrion
b. ribosome
c. chloroplast
d. nucleus
e. central vacuole
34. For glycolysis to run smoothly, it must have a continuous supply of glucose and
a. pyruvate
b. NAD+
c. NADH
d. FAD
e. H2O
.
35. Most of the NADPH produced during aerobic cellular respiration occurs during:
a. fermentation
b. the electron transport chain
c. glycolysis
d. ATP production at the ATP mill
e. the Krebs (Citric Acid) Cycle
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Biology Lecture Exam III v1
pg 5
36. Glycolysis takes place in the:
a. Golgi Body
b. cytoplasm
c. lysosomes
d. matrix (very inside) of the mitochondrion
e. inner membrane of the mitochondrion
37. How many molecules of ATP would be made by a yeast cell using 10 glucose molecules in the
absence of oxygen?
a. 2.5
b. 5
c. 10
d. 20
e. 36
38. Which of the following end products are formed by yeast cells performing fermentation?
a. pyruvate
b. water
c. lactic acid
d. ethanol and CO2
e. 34-38 ATP per glucose
39. The high energy electrons in the C-C covalent bonds in glucose are picked up by which substance
after cellular respiration of a single glucose molecule is complete?
a. ADP
b. pyruvate
c. carbon dioxide
d. O2
e. NAD+
40. What are the products of the light independent reactions, also called the Calvin Cycle?
a. ATP & NADPH
b. CO2 & H2O
c. O2 and ATP
d. Glucose, NADP+ and ADP
e. NADH and FADH2
BIO 160
Biology Lecture Exam III v1
pg 6
41. Which statement is NOT true about enzymes?
a. the hole in an enzyme where catalysis occurs is called the active site
b. enzymes are made of folded polypeptide chains
c. enzymes add energy to the reactants
d. enzymes lower the activation energy required for chemical reactions
e. the reactants in an enzyme-catalyzed reactions are referred to as substrates
42. The substrate that is catalyzed by the enzyme we studied in our on-line enzyme lab is:
a. glucose
b. sucrose
c. fructose
d. invertase
e. acarbose
-------------------------------------------------------------------------------------------------------------------
43. Which of the graphs above most closely matches the effect of pH on enzymatic activity (or enzyme
rate)? (Answer A-E)
44. Energy-requiring reactions in a cell:
a. are found among catabolic or break-down reactions
b. do not need enzymes to speed them up
c. result in the creation of an ATP molecule from ADP and P
d. are those with greater energy in the reactant molecules than in the products
e. need ATP to move forward
-----------------------------------------------------------------------------------------------------EXTRA CREDIT QUESTION (no penalty for missing it)
45. The polysaccharide chitin is found where in the biological world?
a. the cell walls of plant cells
b. the cell walls of fungi and the exoskeletons of arthropods
c. in the human liver where energy is stored as a polysaccharide
d. in the cell walls of bacteria
e. the cell membranes of animal cells
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Biology Lecture Exam III v1
pg 7
BIO 160
Biology Lecture Exam III v1
pg 8
SHORT ANSWER SHEET
12 pts total
Name
Be sure to write your name on this sheet and complete the questions. Then separate it from the test, fold it
in half lengthwise and fill in the first three letters of your last name in the blanks provided on the outside of this
sheet. Insert your computer form, with last name letters uppermost into this folded sheet. Then submit these items
with your test questions when you are finished.
----------------------------------------------------------------------------------------------------------------------------- ---------------
A. 2 pt. Polysaccharides are joined by a reaction involving the loss of a water molecule. This specific
type of chemical reaction is called:
B. 2 pt. Describe one of the functions or activities of protein in living things.
C. 2 pt. A nucleotide is made up of a nitrogenous base, a phosphate, and a
.
D. 2 pts. Which biological molecule (be specific) has the following structure?
name of molecule above
E. 2 pts. A molecule that binds to the “back” of an enzyme, preventing catalysis of the normal reactant(s)
is a(n):
. (Be very specific as to the name and the type of
molecule.)
F. 2 pts. The color(s) of visible reflected by plants (containing chlorophylls, xanthophyll, and beta
carotene) are:
.
EXTRA CREDIT (SHORT ANSWER)
G. 2pts. Draw the chemical structure of an amino group attached to the ball provided:
BIO 160
Biology Lecture Exam III v1
pg 9
First three letters of last name
BIO 160
Biology Lecture Exam III v1
pg 10