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Ninth Grade (Grade 9) Chemistry Questions

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Grade 9 :: Biochemistry by PMISIAS
Cellular respiration is
  1. The process of breaking down chemical energy stored in bonds into energy that can be used by the cell
  2. The process of creating food for the cell
  3. The process of combining oxygen and water to produce another substance to be transported
  4. The process of making proteins
Grade 9 :: Properties of Matter by lisamarie137
Define volume.
  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 :: Properties of Matter by lisamarie137
What is the formula used to find the mass of an object?
  1. [math]M=DV[/math]
  2. [math]M=D/V[/math]
  3. [math]M=M/V[/math]
  4. [math]M=VM[/math]
Grade 9 :: Biochemistry by PMISIAS
Which of the following accurately describes the products of photosynthesis?
  1. oxygen and carbon dioxide
  2. glucose and oxygen
  3. carbon dioxide and water
  4. water and glucose
Grade 9 :: Properties of Matter by lisamarie137
Define mass.
  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 :: Biochemistry by PMISIAS
Which of the following accurately describes the products of cellular respiration?
  1. carbon dioxide and water
  2. oxygen and carbon dioxide
  3. water and glucose
  4. glucose and oxygen
Grade 9 :: Biochemistry by PMISIAS
Enzymes are critical for biological reactions to occur in an organism. Enzymes help chemical reactions occur because
  1. They speed up reactions by adding more substrates
  2. They slow reactions down by increasing the activation energy
  3. They speed up reactions by lowering the activation energy
  4. They slow down reactions by changing the overall temperature
Grade 9 :: Biochemistry by PMISIAS
Which of the following most accurately describes the purpose of cellular respiration?
  1. to breakdown glucose into energy that can be used for cellular functions
  2. to breakdown usable energy into smaller parts
  3. to breakdown different types of substances to be used to build other parts of the cell
  4. all of the above
Grade 9 :: Biochemistry by PMISIAS
Which of the following accurately describes the purpose of photosynthesis?
  1. Release energy by breaking down glucose
  2. Store energy in the form of carbon dioxide
  3. Use sunlight energy to create sugars
  4. Create water that can hydrate the body
Grade 9 :: Biochemistry by PMISIAS
Which group of organic compounds includes the enzymes?
  1. starches
  2. carbohydrates
  3. lipids
  4. proteins
Grade 9 :: Biochemistry by PMISIAS
The 'Lock and key' model of enzymes helps explain why enzymes are
  1. specific to the substrate
  2. will accept any substrate
  3. prefer not to bind with a substrate
  4. fit perfectly with other enzymes
Grade 9 :: Biochemistry by PMISIAS
Enzymes influence chemical reactions in living systems by
  1. providing the substrate for the reaction to occur
  2. affecting the rate at which reactions occur
  3. absorbing water when polymers are formed
  4. combining with excess hydrogen to form gaseous wastes
Grade 9 :: Biochemistry by PMISIAS
Enzymes act as
  1. biological impediments
  2. biological catalysts
  3. biological reactants
  4. all of the above
Grade 9 :: Atomic Structure by sarahshoemake
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