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Tenth Grade (Grade 10) Macromolecules Questions

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Grade 10 Macromolecules
Large organic molecules are called
  1. polymers.
  2. carbohydrates.
  3. micromolecules.
  4. macromolecules.
Grade 10 Macromolecules
Which molecules most directly control the rate at which food is broken down to release energy?
  1. enzymes
  2. hormones
  3. nucleic acids
  4. vitamins
Grade 10 Macromolecules
Which statement correctly describes how enzymes function as a catalyst?
  1. Product joins the enzyme at the active site; activation energy is lowered; reaction occurs; substrate is released; and enzyme is used up.
  2. Substrate joins the enzyme at the activation energy; reaction occurs; active site is lowered; products are released; and enzyme is available to use again.
  3. Substrate joins the enzyme at the active site; activation energy is lowered; reaction occurs; products are released; and enzyme is available to use again.
  4. Reaction occurs; activation energy is lowered; substrate joins the enzyme at the active site; products are released; and enzyme is available to use again.
  5. Substrate joins the enzyme at the active site; products are released; reaction occurs; enzyme joins the products; and activation energy is lowered.
Grade 10 Macromolecules
What gives water many properties that are important to living things?
  1. temperature
  2. hydrogen bonds
  3. density
  4. specific heat
Grade 10 Macromolecules
Which statement about enzymes is NOT true?
  1. Enzymes work best at a specified pH.
  2. All enzymes work inside cells.
  3. Enzymes are proteins.
  4. Enzymes are organic catalysts.
Grade 10 Macromolecules
The bond between two amino acids is
  1. formed by hydrolysis.
  2. an ionic bond.
  3. nonpolar.
  4. a peptide bond.
Grade 10 Macromolecules
Proteins are polymers formed from
  1. nucleic acids.
  2. lipids.
  3. carbohydrates.
  4. amino acids.
Grade 10 Macromolecules
Which statement is true about enzymes?
  1. They act on nonspecific, randomly chosen substrates.
  2. After a reaction, they cannot be reused.
  3. They can speed up metabolic processes in the body.
  4. They cannot change shape.
Grade 10 Macromolecules
A molecule that contains a sugar, phosphate, and a nitrogen base is a
  1. RNA.
  2. codon.
  3. nucleotide.
  4. messenger RNA.
Grade 10 Macromolecules
What do fats do?
  1. store energy
  2. speed up chemical reactions
  3. insulate the body
  4. both a and c
Grade 10 Macromolecules
The main enzyme involved in linking individual nucleotides into DNA molecules is
  1. transfer RNA.
  2. ribose.
  3. RNA polymerase.
  4. DNA polymerase.
Grade 10 Macromolecules
The monomer of a carbohydrate is a
  1. monosaccharide.
  2. disaccharide.
  3. polysaccharide.
Grade 10 Macromolecules
Nucleic acids are polymers of                 monomers.
  1. DNA
  2. monosaccharide
  3. nucleotide
  4. fatty acid
Grade 10 Macromolecules
What are described as the "building blocks" of protein?
  1. fiber
  2. lipids
  3. amino acids
  4. nutrients
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