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25 Cards in this Set
- Front
- Back
The process by which an atom or molecule gains an eletron is:
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reduction
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Most humna enzymes work best within the range of :
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pH 6-8
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All of the following are correct about energy except:
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A boulder perched ona hill has kinetic energy.
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In reference to enzyme activities, repressors_____ the active site, while activators_____ it.
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disrupt, restore
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The First Law of Thermodynamics states:
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That energy can be canged from one form to another, but cannot be created or destroyed.
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Reactions that tend to go on their own releasing energy, are called:
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exergonic
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Objects, are not actively moving but have the capacity to do so are said to possess:
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Potential energy
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If an atom gains an electron ina chemical reaction, it is said that the atom:
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has been reduced
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The process by which an atom or molecule loses an electron is:
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oxidation
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the extra energy required to destabilize existing chemical bonds and to initiate a chemical reaction is called:
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activaton energy
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all cells convert the potential energy found in food molecules into ATP through:
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photosynthesis
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ATP is composed of a sugar, the organic base adenine and
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three phosphate groups
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Which of the following processes does NOT use ATP?
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Diffusion of oxygen into the blood
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Chemical reactions tht release energy are called ____ reactions
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exergonic
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Objects that are moving are said to possess:
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Kinetic Energy
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Which of the following activities does NOT require cellular energy?
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Movement of water across the cell membrane.
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Which of the following factors do NOT influence the action of enzymes?
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Relative Humidity
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Oxidation and reduction reactions always take place together.
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True
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A competitive inhibitor interferes with:
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the active site of the enzyme so a substrate cannot bind
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The making and breaking of chemical bonds is called:
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chemical reactions
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Energy flows into the biological world from the:
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Sun
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The site on the surface of a reactant where it binds to the enzyme is called the:
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binding site.
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The site on the enzyme surface wehre the reactant fits is referred to as the :
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active site
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Enzymes are catalysts becasue they operate to:
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lower activation energy
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Which are the components of an ATP molecule?
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ribose, 3 phosphates 1 adenine
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