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College Macromolecules Questions

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College Macromolecules
Select all those that are properties of a protein.
  1. The monomer an amino acid
  2. Among proteins functions are structure, defense, and breakdown of particles.
  3. Proteins act as catalysts.
  4. Amino acids are joined by peptide bonds.
  5. A long chain of amino acids is called a polypeptide.
College Macromolecules
The primary elements forming biomolecules include                                .
  1. Carbon, Hydrogen and Oxygen
  2. Nitrogen, Potassium and Lithium
  3. Hydrogen, Nitrogen, and Silicon
  4. Calcium, Chlorine and Boron
College Macromolecules
An amino acid is to a protein as a                 is to a nucleic acid.
  1. nucleotide
  2. monosaccharide
  3. fatty acid
  4. triglyceride
College Macromolecules
What is a(n) example of carbohydrate?
  1. Sugar
  2. Starch
  3. Both sugar and starch
  4. Neither sugar and starch
College Macromolecules
What is the most common element in the human body by mass?
  1. Calcium
  2. hydrogen
  3. carbon
  4. oxygen
  5. nitrogen
College Macromolecules
Steroids such as cholesterol and sex hormones are what type of organic molecule?
  1. carbohydrate
  2. lipid
  3. protein
  4. nucleic acid
College Macromolecules
What affects do catalysts have on reactions?
  1. They lower the activation energy for the reaction
  2. Alter the reactions change in free energy
  3. Increases reaction rate
  4. No effect
  5. A and C
College Macromolecules
Which of the following statements about enzymes is FALSE?
  1. enzymes are highly specific.
  2. Enzymes do not affect equilibrium.
  3. Enzymes lower activation energy.
  4. Enzymes can be recycled.
  5. Enzymes can convert an endergonic to an exergonic reaction.
College Macromolecules
What forms the sugar/phosphate backbone of each strand of DNA?
  1. Phosphodiester covalent bonds
  2. Hydroxyldiester covalent bonds
  3. Manganesdiester covalent bonds
  4. Carbodiester covalent bonds
College Macromolecules
Which of these can denature a protein?
  1. Heat
  2. changes in pH
  3. high salt concentration
  4. all of the above
College Macromolecules
What is the most common carbohydrate used in metabolism?
  1. Hydrogen
  2. Glucose
  3. Potassium
  4. ATP
College Macromolecules
Why is ATP and important molecule in metabolism?
  1. Its hydrolysis provides an input of free energy for exergonic reactions
  2. It provides energy coupling between endergonic and exergonic reactions
  3. It's terminal phosphate group contains a strong ionic bond that when hydrolyzed releases free energy
  4. It's terminal phosphate bond has higher energy and the other two
  5. It is one of the four for DNA synthesis
College Macromolecules
Enzymes                       chemical reactions in living systems by                      the activation energy.
  1. slow down, decreasing
  2. slow down, increasing
  3. speed up, decreasing
  4. speed up, increasing
  5. stop, eliminating
College Macromolecules
Which of the following determines the chemical reactivity of biological molecules?
  1. functional groups
  2. isomers
  3. number of carbon atoms
  4. length the hydrocarbon chain
College Macromolecules
How does a competitive inhibitor of an enzyme work?
  1. fitting into the enzyme's active site
  2. fitting into the allosteric site of the enzyme
  3. attaching itself to the substrate, thereby preventing the enzyme from making contact with substrate
  4. increasing the activation energy of the enzyme-catalyzed reaction
College Macromolecules
Which of the following categories includes all others in the list?
  1. monosaccharides
  2. polysaccharides
  3. starch
  4. carbohydrate
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