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enzymes quiz
| Question | Answer |
|---|---|
| catalyst | increases rate of reaction without being altering the process |
| enzyme | speeds up metabolic reactions (type of catalyst) |
| how do enzymes affect activation energy | decreases it |
| what is activation energy | energy needed to start a reaction (by breaking bonds) |
| substrate | the reactant than an enzyme acts on |
| active site | region on enzyme where substrate binds |
| catabolic processes | large molecules are broken down into smaller pieces |
| anabolic processes | small molecules come together to form a larger molecule |
| induced fit | enzyme fits snugly around substrate (lock + key) |
| enzyme activity is affect by what 3 factors? | pH, temperature, chemicals |
| what is denaturing? | protein structure is disrupted and enzyme loses its ability to work properly |
| what are competitive inhibitors? | bind to active sit of an enzyme and compete with the substrate |
| what are noncompetitive inhibitors? | they bind to another part of the enzyme, the enzyme changes its shape and so the active site becomes nonfunctional |
| when a reaction initially starts, reactants get used up so they ______ (increase/decrease), then the reaction makes ______ (more/less) product | decrease more |
| how do enzymes affect digestion? | they speed up digestion by breaking down the food through chemical reactions |
| how do enzymes affect muscle growth? | speed it up |
| as enzymes ______, products ______ | increase, increase |
| enzymes help speed up reactions with less time | |
| how do enzymes affect activation energy? why? | decrease it when an enzyme is present, reactants won't just collide, they'll attach to the enzyme and reaction will occur, using up less energy |
| as temp ______, reaction rate/energy _______ | increases, increases |
| as energy ______, # of enzymes _______, and activation energy ________, reaction rate increases | energy- increases enzymes - increase activation energy - decreases |
| what determines the shape of enzymes? | the interactions between its amino acids |
| cofactors | help enzymes catalyze/speed up chemical reactions (its inorganic unlike enzymes) |
| how do reversible inhibitors reverse the effects of a regular inhibitor? | by adding more substrate |
| what type of catalyst are enzymes? | biological catalysts |
Created by:
sazzyusername