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Ninth Grade (Grade 9) Biochemistry Questions

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Grade 9 Macromolecules
Which macromolecule is usually hydrophobic and includes fats, oils, and sterols?
  1. carbohydrates
  2. lipids
  3. nucleic acids
  4. proteins
Grade 9 Biochemistry
The picture below shows a group of water skate bugs “walking” on the surface of a pond. When an insect lands or falls into the water, the water molecules vibrate. The water skater uses the resulting vibrations to find its prey. What property of water enables this bug to stay on the surface of the pond and not sink?
  1. Water’s high specific heat enhances the vibrations causing the bugs to float.
  2. An optimum pH of the pond water keeps the water calm so that the bugs don’t sink.
  3. The hydrogen atoms, in the water, bond to the bugs’ legs keeping the bugs on the surface.
  4. Hydrogen bonds provide cohesion of the water molecules enabling the bugs to stay afloat.
Grade 9 Biochemical Pathways
Which process is not a part of cellular respiration?
  1. glycolysis
  2. Krebs cycle
  3. Calvin cycle
  4. electron transport chain
Grade 9 Biochemical Pathways
Glycolysis                                                              .
  1. consumes 2 ATP and produces 2 ATP, 2 NADH, and 2 pyruvates
  2. consumes 2 ATP and produces 4 ATP , 2 NADH , and 2 pyruvates
  3. consumes 4 ATP and produces 2 ATP , 2 NADH , and 2 pyruvates
  4. consumes 2 ATP and produces 4 ATP , 4 NADH , and 2 pyruvates
Grade 9 Macromolecules
Which class of macromolecules would a monosaccharide fall into?
  1. carbohydrate
  2. lipid
  3. nucleic acid
  4. protein
Grade 9 Macromolecules
What are the monomers of lipids?
  1. amino acids
  2. simple sugars
  3. fatty acids and glycerol
  4. nucleic acids
Grade 9 Macromolecules
Which statement about macromolecules is true?
  1. Cellulose is a polymer comprised of several glucose molecules.
  2. A polysaccharide is a complex lipid involved in storage.
  3. Steroids are complex proteins necessary to control body chemistry.
  4. Carbohydrates have glucose, phosphate, and bases.
Grade 9 Biochemistry
All four macromolecules share carbon backbones and                                                                 .
  1. Hydrogen, nitrogen, and phosphorus in ionically bonded monomers.
  2. Hydrogen, nitrogen, and oxygen ionically bonded monomers.
  3. Hydrogen and oxygen in covalently bonded monomers.
  4. Hydrogen and nitrogen in covalently bonded monomers.
Grade 9 Macromolecules
Water's polarity accounts for what properties? Select all the options that apply.
  1. cohesion
  2. adhesion
  3. surface tension
  4. strong solvent
Grade 9 Macromolecules
Which pair is a macromolecule with its correct function?
  1. nucleic acid, store short-term energy
  2. lipid, store long-term energy
  3. carbohydrate, transport molecules across membranes
  4. protein, store genetic information
Grade 9 Macromolecules
The tertiary level of protein synthesis involves the
  1. bonding of polypeptides.
  2. interactions of side chains (R-groups).
  3. the formation of an alpha helix or beta-pleated sheet.
  4. the bonding of amino acids through dehydration synthesis.
Grade 9 Macromolecules

This question is a part of a group with common instructions. View group »

Which molecule is the building block of proteins?
  1. amino acids
  2. DNA
  3. RNA
  4. enzymes
Grade 9 Macromolecules

This question is a part of a group with common instructions. View group »

Which statement is true concerning macromolecules?
  1. Simple sugars are made of polysaccharides.
  2. Glycerol is made of fatty acids.
  3. Polymers are made of monomers.
  4. Amino acids are made of proteins.
Grade 9 Macromolecules
The building blocks of a polymer are called
  1. organic molecules.
  2. macromolecules.
  3. monomers.
  4. proteins.
Grade 9 Biochemical Pathways
What are the products of cellular respiration?
  1. oxygen and ATP
  2. oxygen and carbon dioxide
  3. ATP, carbon dioxide, and water
  4. oxygen, glucose, and carbon dioxide
Grade 9 Macromolecules
The enzymes found in our bodies are examples of which macromolecule?
  1. fats
  2. lipids
  3. carbohydrates
  4. proteins
  5. isotopes
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