Transcript Which of the following correctly sequences the steps of the scientific

1.Which of the following correctly
sequences the steps of the
scientific method?
•a•question, observe, explain, design and conduct
experiment, collect and analyze data, report
findings
•b•observe, question, make a testable explanation,
experiment, collect and analyze data, state
findings
•c •form a hypothesis, observe, investigate a testable
question, collect and analyze data, state results
•d•design and conduct an investigation based on a
testable question, form a hypothesis, collect data,
state findings
2.Which element is found in
proteins but not carbohydrates or
lipids?
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a.N
b.C
c.H
d.O
3.Amino acids are the building
blocks of which macromolecule?
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a.carbohydrate
b.lipid
c.DNA
d.protein
4.Which statement is a
fundamental principle of the cell
theory?
a.All cells have a (cell) plasma membrane.
b.Eukaryotic cells are larger than prokaryotic
cells.
c.Living organisms are composed of cells.
d.The genetic material in cells is DNA.
5.Chloroplasts are organelles that convert
light energy to sugars. These organelles are found
only in plants. Which organelles are found only in
animals?
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a.golgi apparatus
b.mitochondria
c.lysosomes
d.ribosomes
6.Which of the following is NOT a
function of proteins?
• a.store and transmit heredity
• b.help to fight disease
• c.control the rate of reactions and regulate
cell processes
• d.build tissues such as bone and muscle
7.You probably won't find a cell wall
in which of these kinds of
organisms?
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a.plants
b.animals
c.fungi
d.none of the above
8. Which means of particle
transport requires input of energy
from the cell?
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a.diffusion
b.osmosis
c.facilitated diffusion
d.active transport
9.Photosynthesis uses sunlight to
convert water and carbon dioxide
into
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a.oxygen.
b.high-energy sugars.
c.ATP and oxygen.
d.oxygen and high-energy sugars.
10. When complex molecules are oxidized in
living cells,
A. the free energy that was stored in the
molecule is converted to chemical energy.
B. the energy that is released is in the form of
free energy and heat.
C. the molecule gains energy.
D. ADP can be formed from the transfer of free
energy.
11. The products of the light
reactions of photosynthesis are
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a.H2O, CO2, and ATP.
b.NADPH, H2O, and ADP.
c.O2, NADPH, and ATP.
d.O2, ATP, and CO2.
12. Which of the following is a
nucleotide found in DNA?
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a.ribose + phosphate group + thymine
b.ribose + phosphate group + uracil
c.deoxyribose + phosphate group + uracil
d.deoxyribose + phosphate group +
cytosine
13. A granum is a(an)
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a.stack of chloroplasts.
b.stack of thylakoids.
c.membrane enclosing a thylakoid.
d.photosynthetic pigment molecule.
14.Where in the chloroplast is
chlorophyll found?
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a.in the stroma
b.in the thylakoid
c.in the ATP
d.in the glucose
15.If carbon dioxide is removed
from a plant's environment, what
would you expect to happen to its
production of high-energy sugars?
• a.More sugars will be produced.
• b.Fewer sugars will be produced.
• c.The same number of sugars will be produced
but without carbon dioxide.
• d.Carbon dioxide does not affect the production
of high-energy sugars in plants.
16. The starting molecule for
glycolysis is
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a.ADP.
b.pyruvic acid.
c.citric acid.
d.glucose.
17. All of the following are sources
of energy during exercise EXCEPT
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a. ATP.
b.alcoholic fermentation.
c.lactic acid fermentation.
d.cellular respiration.
18.Which of the following best describes the
effect of temperature on enzyme activity?
• a.For enzyme activity to be high, the cell must
become as warm as possible.
• b.For enzyme activity to be high, the cell must
become as cool as possible.
• c.For enzyme activity to be high, the cell must
remain within a narrow range of temperatures.
• d.Temperature is not important, since the role of
enzymes is to overcome the need for activation
energy.
19. Identify the reactant(s) in the
chemical reaction, CO2 + H2O H2CO3.
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A. CO2, H2O, and H2CO3
B.CO2 and H2O
C.H2CO3
D.CO2
20. A group of cells that are similar
in structure and function are called
a/(an) ____.
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a.tissue
b.organ system
c.organ
d.organism
21.Why can you not see the
nuclear membrane divide during
the division of a prokaryote?
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a.It is too small.
b.It happens too quickly.
c.Prokaryotes do not have nuclei.
d.You can see it divide.
22.Photosynthesis, fermentation,
and cell respiration all
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a.produce CO2 and H2O.
b.produce ATP molecules.
c.involve electron transport systems.
d.replace the supply of atmospheric O2.
23.A researcher is interested in the effects of
nitrate and phosphate on plant growth and sets
up an experiment in which groups of five plants
are given 1, 2, and 3 grams of nitrate and 1, 2,
and 3 grams of phosphate in all combinations
over a period of one month. The researcher
measures plant height and weight at the end of
the experiment. What is missing in this
experimental design?
• A. control
B. an independent
variable
• C. dependent variable D. a constant
24. When two amino acids are bonded
chemically,
• A.energy is released.
• B.water is released, dehydration synthesis
• C.water is added.
• D.carbon dioxide is added.
25. Amino acid is to protein as
A.fat is to lipid.
B.DNA is to RNA.
C.sugar is to fat.
D.simple sugar is to starch.
• 26.A single carbon atom can form a
maximum of how many single covalent
bonds?
• A.2
B.4
• C.6
D.8
27. In chemical reactions, atoms are
• A.created.
• B.destroyed.
• C.rearranged.
• D.neutralized.
28. When hydrogen and oxygen combine to
form water, water would be
• A.a product.
• B.a reactant.
• C.both a product and a reactant.
• D.neither a product nor a reactant.
29.Which organelle packages proteins
before they leave the cell?
a. lysosomes
b. vaculoe
c. golgi bodies
d. endoplasmic
reticulum
30. Which of the following statements about
enzymes is true?
• A. Enzymes work best at a specified pH.
• B. All enzymes work inside cells.
• C. Enzymes are Lipids.
• D. Enzymes are slow reactions.
31. What is a major difference between
facilitated diffusion and active transport?
• A. Active transport uses energy.
• B. Active transport uses proteins in the
process.
• C. Facilitated diffusion moves molecules
through the plasma membrane.
• D. Facilitated diffusion requires large
amounts of energy.
32. At what point in the process of diffusion
is dynamic equilibrium reached?
• A.when the movement of the molecules
stops being random
• B.when the molecules are mixed and stop
moving
• C.when the rate of change in the solution
slows by one half
• D.when there is continuous movement and
no overall change
33. The diffusion of water across a
selectively permeable membrane is called
• A. osmotic pressure.
• B. osmosis.
• C. facilitated diffusion.
• D. active transport.
34.Lactic acid fermentation occurs in
• A.bread dough.
• B.any environment containing oxygen.
• C.muscle cells.
• D.mitochondria.
35. Which of the following is the correct sequence
of events in cellular respiration?(2.1A 3.1e)
• A.glycolysis fermentation Krebs cycle
• B.Krebs cycle electron transport
glycolysis
• C. glycolysis Krebs cycle electron
transport
• D. Krebs cycle glycolysis electron
transport
36.Which series is arranged in
order from largest to smallest in
size?
• A.chromosome, nucleus, cell, DNA,
nucleotide
• B.cell, nucleus, chromosome, DNA,
nucleotide
• C.nucleotide, chromosome, cell, DNA,
nucleus
• D.cell, nucleotide, nucleus, DNA,
chromosome
37. Which of the following is a
nucleotide found in DNA?
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A.ribose + phosphate group + thymine
B. ribose + phosphate group + uracil
C.deoxyribose + phosphate group + uracil
D.deoxyribose + phosphate group +
cytosine
38. Which of these processes takes
place in the cytoplasm of a cell?
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A.glycolysis
B.electron transport
C.Krebs cycle
D.all of the above
• 39. Plants gather the sun's energy with
light-absorbing molecules called
• A.chlorophyll.
• B.thylakoids.
• C.chloroplasts.
• D.glucose.
• 40. Which of the following affects the rate
of photosynthesis?
• A.water
• B.temperature
• C.light intensity
• D.all of these
41. Fairly small polar molecules,
such as amino acids and sugars, are
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b.
c.
d.
passed freely through the cell membrane.
helped into the cell by transport proteins.
kept out of the cell by transport proteins.
carried across the membrane by water.
42. The enzyme lactase is used to break milk sugar
down into a simpler sugar. Which of the following is
true regarding lactase?
• A. The active site for the reaction can be found on milk
sugar.
• B. Milk sugar is called the substrate of the reaction.
• C. Lactase could probably be used to break down
many different sugars in addition to milk sugar.
• D. When lactase breaks down milk sugar, the enzyme
is destroyed.
43.The functions of the human nephron are
• A. fluid filtration, reabsorption, and
secretion.
• B. elimination of carbon dioxide and
nitrogenous wastes.
• C. maintenance of water and oxygen
balance in the body.
• D. filtration of fluid from the blood and
elimination of urine.
44. Which of these foods had the lowest
concentration of H+ ions?
• A. apple, pH 2.9
• B. corn, pH 6.2
• C. bread, pH 5.5
• D. milk, pH 6.6
45. Most plants rely on intracellular digestion because
a.
they are digesting the food they made
themselves in their own cells.
b. they lack the necessary enzymes for
extracellular digestion.
c. they are able to extract more energy from
their food when they rely on intracellular
digestion.
d. they only consume very small molecules
that easily fit inside the cell.
46. The ashes left in a wood stove
• A. have more energy and more entropy than
the wood they came from.
• B. have more energy, but less entropy, than
the wood they came from.
• C. have less energy, but more entropy, than
the wood they came from.
• D. have less energy and less entropy than
the wood they came from.
47. Which stage of Cellular Respiration is
the main source of energy for anaerobic
yeast cells?
• A. glycolysis
• B. Krebs cycle
• C. electron transport system
• D. all three stages
48. What molecule is synthesized as
electrons pass between the two
photosystems?
• A. ATP
• B. NADH
• C. FADH
• D. NADP
49 Why would breathing through gills be a
disadvantage to land animals?
• A. Gills have too little surface area for gas
diffusion in air.
• B. Gills would dry out quickly in the air.
• C. The animal must remain near a body of
water.
• D. Air contains too little oxygen for efficient
gas exchange.
50. Cells don’t ferment fatty acids because
• A. bacteria and yeast cannot metabolize
fatty acids.
• B. fatty acids contain more energy than
glucose.
• C. fatty acids have a tendency to
decompose completely.
• D. fatty acids never pass through the
glycolysis stage.