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26 Cards in this Set
- Front
- Back
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endergonic reactions require:
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a net input of energy
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The end products of the light-dependent reactions of photosynthesis are
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ATP, NADPH, and O2
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catalysts reduce what?
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activation energy
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enzymes speed up reactions by lowering the ______ energy?
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activation
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the activation energy of a reaction refers to the minimum amount of energy
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necessary to cause it to proceed on its own
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enzymes are considered catalysts because:
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they make reactions occur faster than they would on their own
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activation energy describes the minimum amount of energy required _______.
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necessary to cause it to proceed on its own
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organisms unable to feed themselves but that must feed on others are called:
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heterotrophs
trophs= to feed |
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a molecule becomes reduced when it:
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gains an electron
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englemann's "beer-can science" experiment demonstrated that:
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plant cells produce different amounts of oxygen when illuminated by different colors of light.
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openings in plant leaves that allow water to enter and exit are called ______.
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stomata
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all of the following compounds are required in photosynthesis except:
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oxygen
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When light hits a photopigment, light boosts a few of the pigments ______ to a higher energy level.
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electrons
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one unintended outcome of the non cyclic pathway used by early autotrophs was the _______
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enrichment of the atmosphere with oxygen
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The action of photosystem I can be described as cyclic because:
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the system loses an excited electron, which moves down the ETC and returns to it
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What size molecule captures CO2 from air during the dark phase of photosynthesis?
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5
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When carbon dioxide is captured the 6-carbon molecule splits into:
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a C3 acid
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What is the source of the oxygen produced during photosynthesis?
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electrons are removed from water molecules leaving hydrogen ion and O2
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Some of the C3 sugars can be combined to form:
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a C5CO2 capturing molecule
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after the C3 sugars are combined the C6 molecule can form:
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starch, amylose, cellulose - all of them
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What is the role of NAD in photosynthesis and respiration?
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carries electrons
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The oldest energy-releasing metabolic pathway
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?
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How many ATP's are required for the early stages of glucose breakdown in glycosis?
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2
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Aerobic respiration from greatest to least by amount of ATP produced:
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electron transfer phosphorylation, glycosis, kreb cycle ?
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final carbon-containing end product of the complete aerobic respiration of glucose
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carbon dioxide
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in the absence of oxygen:
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with fermentation small amounts of ATP ?
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