1. Energy is required for a variety of life processes including
a)
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growth and reproduction.
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b)
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movement.
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c)
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transport of certain materials across cell membranes.
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d)
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All of the above
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2. Heterotrophs are organisms that can
a)
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produce food from inorganic molecules and sunlight.
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b)
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survive without energy.
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c)
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consume other organisms for energy.
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d)
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carry out either photosynthesis or chemosynthesis.
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3. Based on the cycle of photosynthesis and cellular respiration, one can say that the ultimate original source of energy for all living things on Earth is
a)
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glucose.
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c)
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the sun.
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b)
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water.
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d)
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carbon dioxide.
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4. The process whereby plants capture energy and make complex molecules is known as
a)
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homeostasis.
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c)
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photosynthesis.
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b)
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evolution.
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d)
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development.
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5. Suspended in the fluid stroma of chloroplasts are
a)
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organelles called eukaryotes.
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b)
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numerous mitochondrial membranes.
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c)
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small coins that provide energy.
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d)
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stacks of thylakoids called grana.
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6. The sun is considered the ultimate source of energy for life on Earth because
a)
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all organisms carry out photosynthesis.
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b)
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all organisms carry out cellular respiration.
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c)
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either photosynthetic organisms or organisms that have eaten them provide energy for all other organisms on Earth.
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d)
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the sun heats Earth’s atmosphere.
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7. The role of chlorophyll in photosynthesis is to
a)
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absorb light energy.
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b)
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pass electrons to carotenoids.
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c)
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split water molecules.
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d)
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All of the above
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8. Chlorophyll is green because
a)
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it absorbs green wavelengths of light.
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b)
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it absorbs blue and yellow wavelengths, which make green.
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c)
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it reflects green wavelengths of light.
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d)
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it transmits light and causes an optical illusion.
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9. What happens when a chlorophyll molecule absorbs light?
a)
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Some of its electrons are raised to a higher energy level.
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b)
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It disintegrates, giving off huge amounts of heat.
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c)
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It glows, radiating green light and giving the plant a green appearance.
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d)
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It attracts electrons from other molecules.
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10. chloroplast : grana ::
a)
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photosystem : pigment molecules
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b)
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chlorophyll : pigments
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c)
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thylakoids : photosynthesis
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d)
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chlorophyll : green
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11. When electrons of a chlorophyll molecule are raised to a higher energy level,
a)
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they become a particle of light.
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b)
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they form a glucose bond.
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c)
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they enter an electron transport chain.
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d)
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they enter the Calvin cycle.
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12. NADP+ is important in photosynthesis because it
a)
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becomes oxidized to form NADP.
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b)
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is needed to form chlorophyll.
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c)
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provides additional oxygen atoms.
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d)
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provides protons and electrons for some reactions.
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13. The electrons of photosystem I
a)
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are eventually replaced by electrons from photosystem II.
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b)
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attach to water molecules during the light reaction.
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c)
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are at the end of the electron transport chain.
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d)
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are absorbed by oxygen molecules to form water.
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14. The source of oxygen produced during photosynthesis is
a)
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carbon dioxide.
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c)
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chlorophyll.
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b)
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water.
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d)
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glucose.
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15. The major atmospheric byproduct of photosynthesis is
a)
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nitrogen.
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c)
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water.
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b)
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carbon dioxide.
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d)
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oxygen.
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16. During the Calvin cycle, carbon-containing molecules are produced from
a)
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carbon atoms from ATP.
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b)
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carbon atoms, hydrogen atoms, and oxygen atoms from glucose.
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c)
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carbon atoms from carbon dioxide in the air and hydrogen atoms from water.
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d)
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carbon atoms from carbon dioxide in the air and hydrogen atoms from NADPH.
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17. Which of the following processes occurs in the thylakoid membrane and converts captured light energy into chemical energy?
a)
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the Calvin cycle
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c)
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light absorption
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b)
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ATP synthase
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d)
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chemiosmosis
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18. Chemiosmosis in the thylakoid membrane is directly responsible for
a)
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adding protons to NADP+.
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b)
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providing the energy to produce ATP molecules.
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c)
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producing ATP-synthetase.
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d)
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generating glucose molecules.
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19. At the thylakoid membrane,
a)
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electrons return to their original energy levels.
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b)
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electrons are pushed out of the thylakoid.
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c)
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energy from electrons is used to make glucose.
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d)
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the thylakoid bursts, releasing energy.
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20. Products of the light reactions of photosynthesis that provide energy for the Calvin cycle are
a)
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oxygen and ATP.
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c)
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ATP and NADPH.
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b)
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water and oxygen.
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d)
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oxygen and NADPH.
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21. The energy used in the Calvin cycle for the production of carbohydrate molecules comes from
a)
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ATP made during cellular respiration.
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b)
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the Krebs cycle.
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c)
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ATP made in the light reactions of photosynthesis.
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d)
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CO2 absorbed during the last stage of photosynthesis.
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22. During photosynthesis, the series of reactions that create the complex carbohydrates needed for energy and growth is called
a)
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the Calvin cycle.
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b)
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the Krebs cycle.
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c)
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the light reactions.
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d)
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the electron transport chain.
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23. All organic molecules contain carbon atoms that ultimately can be traced back in the food chain to
a)
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the bodies of heterotrophs.
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b)
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carbon dioxide from the atmosphere.
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c)
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water absorbed by plants.
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d)
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the carbon that comes from the sun.
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24. Which of the following can be produced from the products of the Calvin cycle?
a)
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carbohydrates
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c)
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proteins
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b)
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lipids
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d)
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All of the above
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25. c
26. Stacks of thylakoids, called __Grana_____, are suspended in the stroma of chloroplasts.
27. Organisms that harvest energy from either sunlight or chemicals in order to make food molecules are called ____Autotrophs______.
28. The main pigment associated with the two photosystems is __chlorophyll______.
29. The abundance of oxygen in Earth’s atmosphere is a result of millions of years of __photosynthesis________.
30. Chemiosmosis in the thylakoid membrane results in the synthesis of ____ATP_____.
