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Ninth Grade (Grade 9) Chemistry Questions

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Grade 9 Biochemical Pathways
Grade 9 Macromolecules
How do enzymes help chemical reactions to occur?
  1. They speed up reactions by adding more substrates to react with enzymes
  2. They slow down reactions by increasing the activation energy
  3. They speed up chemical reactions by lowering the activation energy required
  4. They slow down reactions by changing the overall temperature of the reaction
Grade 9 Biochemical Pathways
Which of the following are typically products of cellular respiration?
  1. carbon dioxide and water
  2. oxygen and carbon dioxide
  3. water and glucose
  4. glucose and oxygen
Grade 9 Properties of Matter
Which one of the following substances will float in water? The density of water is [math]1.0 g//cm^3[/math]
  1. [math]"density of gold" = 19.3 g//cm^3[/math]
  2. [math]"density of milk" = 1.03 g//cm^3[/math]
  3. [math]"density of ice" = 0.92 g//cm^3[/math]
Grade 9 Biochemical Pathways
Which of the following are typically products of photosynthesis?
  1. oxygen and carbon dioxide
  2. glucose and oxygen
  3. carbon dioxide and water
  4. water and glucose
Grade 9 Biochemical Pathways
Which of the following correctly describes the purpose of photosynthesis?
  1. To release energy by decomposing glucose
  2. To store energy in the form of carbon dioxide
  3. To use sunlight energy to make sugars
  4. To create water for hydration
Grade 9 Biochemical Pathways
Grade 9 Macromolecules
What is the location where the substrate binds to the enzyme?
  1. neuroreceptor
  2. active site
  3. reception area
  4. receiving site
Grade 9 Macromolecules
What are the reactants called in an enzyme-catalyzed reaction?
  1. Carbon dioxide and water
  2. Inhibitors
  3. Active sites
  4. Substrates
Grade 9 Periodic Table and Elements
Grade 9 Macromolecules

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

Grade 9 Macromolecules
Grade 9 Biochemical Pathways
Grade 9 Biochemical Pathways
Photosynthesis is an instance of
  1. homeostasis
  2. reproduction
  3. metabolism
  4. growth & development
  5. cell structure
Grade 9 Properties of Matter
Which of the following best defines density?
  1. the amount of space occupied by an object
  2. the measurement of the quantity of matter in an object
  3. the mass per unit volume of a material
  4. the mass per unit density of a material
Grade 9 Macromolecules
Why must cells produce many different kinds of enzymes?
  1. Enzymes are consumed quickly
  2. Most cellular reactions need a specific, unique enzyme
  3. They need some way to use the protein they consume
  4. Enzymes are not very helpful in speeding up reactions
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