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25 Cards in this Set

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