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Proteins And Enzymes

Isidro Clark avatar Isidro Clark
24 July 2022
4.7 (114 reviews)
24 test answers

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question
How do enzymes affect the reactions in living cells?
answer
Enzymes affect the reactions in living cells by lowering the activation energy of the reaction.
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True or False: Enzymes work best a specific pH.
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True.
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True or False: Enzymes are not affected by temperature changes.
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False.
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True or False: Enzymes are proteins.
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True.
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True or False: Enzymes are organic catalysts.
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True.
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What is a specific reactant acted upon by an enzyme called?
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A substrate is the specific reactant acted upon by an enzyme.
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How does the name of an enzyme typically end?
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The name of an enzyme typically ends with "ase".
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Define Induced Fit.
Define Induced Fit.
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A proposed mechanism of interaction between an enzyme and a substrate.
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What happens to an enzyme that has broken up a protein?
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After an enzyme has broken up a protein it returns to its original shape and will work on another molecule or substrate.
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What is an enzyme inhibitor?
What is an enzyme inhibitor?
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An enzyme inhibitor is a molecule that binds to an enzyme and decreases its activity.
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Why does each enzyme complete only one job?
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Enzymes are highly specific catalysts. An enzyme and its substrate both have very specific shapes designed to fit together.
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Which enzyme would be most active in the stomach?
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Pepsin in an enzyme active in the stomach.
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Define Denature
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Denature is when an enzyme stops functioning due to high heat.
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Define Enzyme
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Enzymes are macromolecular biological catalysts. Enzymes accelerate chemical reactions.
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Define Catalyst
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A catalyst is a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
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What is the difference between competitive and non-competitive inhibitors?
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Competitive inhibitors bind to the enzyme at the active site, preventing substrates from bonding. Non-competitive inhibitors bind to the enzyme not at the active site, therefore not preventing substrates from bonding.
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What are the main functions of proteins found in organisms?
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Protein is a major source of energy and are involved in the creation of some hormones. They transport and store molecules.
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What elements are found in proteins?
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Proteins are composed of hydrogen, oxygen, nitrogen, and carbon. Some proteins also contain sulfur.
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Which monomer is linked together to form proteins?
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Amino Acids are protein's monomers.
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How many different types of amino acids are there?
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There are 20 types of amino acids.
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Why is a proteins shape so important?
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A proteins shape determines its function.
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List and describe the four levels of protein structure.
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1. Primary - The order of amino acids 2. Secondary - The regular pattern of coils or folds of the polypeptide chain 3. Tertiary - The overall three dimensional shape of polypeptide chain 4. Quaternary - The association of two or more polypeptide subunits
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What is a disulfide bridge?
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A disulfide bridge is a covalent bond derived from two thiol groups.
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Why is primary structure important?
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Primary structure is important because the order of amino acids determine where the polypeptide chain will fold based on each acids characteristics, which affects all other levels.