MC |
Biology |
Standard: 02 |
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Objective: 01. Describe the fundamental chemistry of living cells. |
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ILO: |
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The
six elements that make up 99.9% of all living things include
a. C, K, O, N, Ca and S
b. C, P, S, H, O and N
c. C, P, K, I, O and N
d. N, O, P, H, S and T
Correct Answer: b
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MC |
Biology |
Standard: 02 |
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Objective: 01. Describe the fundamental chemistry of living cells. |
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ILO: |
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Which chemical elements would you expect to find in abundance in a living cell?
a. hydrogen, neon, argon
b. carbon, oxygen, hydrogen
c. iron, magnesium, calcium
d. sodium, potassium, sulfur
Correct Answer: b
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MC |
Biology |
Standard: 02 |
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Objective: 01. Describe the fundamental chemistry of living cells. |
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ILO: |
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Fats
are important energy storage compounds because they:
a. readily breakdown to form glucose.
b. provide immediate energy.
c. contain more energy per gram than carbohydrates or proteins.
d. are liquid at normal body temperatures.
e. don't require nitrogen.
Correct Answer: c
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MC |
Biology |
Standard: 02 |
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Objective: 01. Describe the fundamental chemistry of living cells. |
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ILO: |
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What are the building blocks of protein molecules?
a. polymers
b. fatty acids
c. glucose molecules
d. amino acids
Correct Answer: d
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MC |
Biology |
Standard: 02 |
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Objective: 01. Describe the fundamental chemistry of living cells. |
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ILO: |
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Which of the following describes the function of proteins?
a. energy formation and storage
b. energy used in muscles and reaction
c. structural use and enzyme formation
d. heredity and genetic code carriers
Correct Answer: c
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MC |
Biology |
Standard: 02 |
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Objective: 01. Describe the fundamental chemistry of living cells. |
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ILO: |
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What
is the most common food storage compound in plants?
a. glucose.
b. starch.
c. sucrose.
d. cellulose.
e. fat.
Correct
Answer:
b
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MC |
Biology |
Standard: 02 |
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Objective: 01. Describe the fundamental chemistry of living cells. |
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ILO: |
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Identify
three organic compounds by how they react to the following tests. Place the
correct letter on the line by the compound.
a. turns orange when boiled in Benedict's solution
b. turns black when iodine is added
c. turns purple when Bieuret's reagent is added
d. turns yellow in the presence of bromthymol blue
e. leaves a grease mark when rubbed on brown paper
1. Starch _____
2. Triglyceride lipid _____
3. Glucose _____
Correct
Answers:
1. b
2. e
3. a
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MC |
Biology |
Standard: 02 |
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Objective: 01. Describe the fundamental chemistry of living cells. |
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ILO: |
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The
solubility of water is due to
a. the presence of oxygen
b. the uneven distribution of its electrons
c. its ability to bond with lipids
d. its basic pH
Correct Answer: b
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MC |
Biology |
Standard: 02 |
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Objective: 01. Describe the fundamental chemistry of living cells. |
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ILO: |
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The
properties of water make it very valuable to living systems. Which of the
following statements regarding water is not true?
a. it covers more than 75% of the earth's surface
b. it expands slightly when it freezes
c. it is the greatest solvent in the world
d. it modifies temperature extremes
e. it makes up about 50% of your body
Correct
Answer: e
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MC |
Biology |
Standard: 02 |
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Objective: 01. Describe the fundamental chemistry of living cells. |
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ILO: |
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Which
characteristic of water allows it to support the weight of objects more dense
than water?
a. capillary action
b. surface tension
c. specific heat
d. evaporation
e. adhesion
Correct
Answer: b
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MC |
Biology |
Standard: 02 |
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Objective: 01. Describe the fundamental chemistry of living cells. |
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ILO: |
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Match
the appropriate term with its description by writing the correct letter on the
line to the left of the description. A letter may be used once, more than once,
or not at all.
a. solute
b. solvent
c. evaporation
d. hydrophilic starch,
gelatin, wood, etc. causing them to swell
e. hydrophobic
f. imbibition
g. ionization
h. neutral
_____
1. having an affinity (attracted to) for water
_____
2. cooling influence that occurs with a change from liquid to gas
_____
3. characteristic of oil that keeps it from mixing with water
_____
4. movement of water into substances such as starch, gelatin, wood, etc.
causing them to
swell
_____
5. a substance in which another is dissolved
Correct
Answers:
1. d
2. c
3. e
4. f
5. b
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MC |
Biology |
Standard: 02 |
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Objective: 01. Describe the fundamental chemistry of living cells. |
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ILO: |
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Match the appropriate term with its description by writing the correct letter on the line to the left of the description. A letter may be used once, more than once, or not at all.
a. adhesion
b. capillary action
c. cohesion
d. condensation
e. evaporation
f. freezing
g. hydrogen bond
h. polar
i. specific heat
j. surface tension
_____
1. attraction of like molecules.
_____
2. having an unequal distribution of electrons
_____
3. movement of water through tiny spaces
_____
4. attraction between two polar molecules
_____
5. change from a gas to a liquid
_____
6. the amount of energy required to raise the temperature of 1 cm3
of water one degree
Celsius
Correct
Answers:
1. c
2. h
3. b
4. g
5. d
6. i
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MC |
Biology |
Standard: 02 |
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Objective: 01. Describe the fundamental chemistry of living cells. |
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ILO: |
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Which
of the following statements are true of enzymes?
a. they are lipids
b. they will react with most body chemicals
c. they can only be used once
d. they usually slow down reactions and prevent overheating of the
cells
e. they usually speed up chemical reactions
Correct Answer: e
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MC |
Biology |
Standard: 02 |
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Objective: 01. Describe the fundamental chemistry of living cells. |
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ILO: |
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pH Scale 1 - 6 = Acid 7 = Neutral 8 - 14= Alkaline

The
enzyme graphed above will work best in
a. an alkaline medium
b. an acid medium
c. a neutral medium
d. a carbohydrate
medium
Correct
Answer: b
I |
Biology |
Standard: 02 |
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Objective: 01. Describe the fundamental chemistry of living cells. |
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ILO: |
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This chart shows the percentage amount of macromolecules found in a body tissue.

Which tissue type would this cell be from?
a. fat
b. muscle
c. bone
d. blood
Correct Answer: b
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E |
Biology |
Standard: 02 |
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Objective: 01. Describe the fundamental chemistry of living cells. |
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ILO: |
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Describe the function of carbohydrates, lipids, proteins and nucleic acids in cells.
Sample Answer:
Carbohydrates supply cells with energy, lipids make up cell membranes and also store energy, proteins provide cell structure and make-up enzymes, and nucleic acids are the building blocks of DNA which carries genetic information.
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E |
Biology |
Standard: 02 |
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Objective: 01. Describe the fundamental chemistry of living cells. |
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ILO: |
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Food
storage in plants is usually in the form of starch. Food storage in animals is
usually in the form of lipids. Why is it an advantage for animals to store
their food in the form of lipids rather than starch?
Sample
Answer:
Lipids contain about 2.5 times more energy per gram than starch (lipids have a higher ratio of C-H bonds which have the highest energy of all covalent bonds). Animals, unlike plants, cannot make their own food and have to actively search for it. Because of their active lives, they have high energy requirements and they must store energy in a concentrated form that will add minimal weight or volume to their bodies so they can still be mobile.
Scoring
Guide:
Comparison
of energy per gram in lipids versus starch 40%
AnimalsÍ
need for high energy without sacrificing mobility 40%
Correct
spelling, punctuation and language use 20%
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E |
Biology |
Standard: 02 |
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Objective: 01. Describe the fundamental chemistry of living cells. |
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ILO: |
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Compare (state similarities and differences) multiple aspects of two macromolecules. Include (but do not limit yourself to) energy content, function in living organisms, basic structure, and relationships between the two.
Scoring Guide:
4 additional, appropriate, and correct information related to the two chosen
macromolecules present and correct
relationships between molecules appropriate and described
3 similarities and differences addressed (at least 2 of each)
description of relationship between the two chosen macromolecules attempted
2 attempt at comparison of the following:
energy content
function in living organisms
basic structure
addressed and statements made are correct
1 some aspects of major macromolecules addressed and correct
0 unacceptable
all information given incorrect and severely limited
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E |
Biology |
Standard: 02 |
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Objective: 01. Describe the fundamental chemistry of living cells. |
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ILO: |
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Explain
why a razor blade, with a density greater than water, will "float" on
water. Include an explanation of cohesion and surface tension. Give an example
of this principle demonstrated in nature.
Sample
Answer:
Water molecules cling to each other as a result of hydrogen bonds. This attraction of water molecules to each other is called cohesion. Surface tension is a film-like surface on water caused by cohesion. If an object is small enough and does not break the surface it will float on that film-like surface. If it should break the surface it will quickly sink to the bottom. Surface tension enables certain insects to walk on the water's surface and not sink and some animals such as snails and flatworms can cling to the underside of the film.
The
film provides a surface for feeding for many insects and, in addition, better
access to oxygen for some aquatic organisms. Surface tension is the reason that
water beads form into a spherical shape.
Scoring
guide:
clear
explanation of why a razor blade will float on water 40%
explanation
of cohesion and surface tension 20%
example
in nature 20%
correct spelling, punctuation and language usage 20%
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E |
Biology |
Standard: 02 |
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Objective: 01. Describe the fundamental chemistry of living cells. |
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ILO: |
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After
30 minutes of active exercise the body temperature would exceed 120 degrees F
if it were not for our "cooling system" of evaporation. Explain the
principle of evaporation and why it is such an effective mechanism for cooling
our body. Include an explanation of the heat of vaporization.
Sample
Answer:
Water on the surface of the skin evaporates as the heat of the body causes the hydrogen bonds to break between water molecules and they escape the liquid state and enter the air as a gas. The heat of vaporization is the amount of heat energy required to convert 1 gram of liquid to 1 gram of gas. Water has a very high heat of vaporization because of the strength of the hydrogen bonds between the water molecules in the liquid state. The heat from the surface of the body that breaks the hydrogen bonds is changed to energy of motion as the water molecule escapes leaving an "absence of heat" or a loss of kine