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Ninth Grade (Grade 9) Chemistry Questions

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Grade 9 Macromolecules
Grade 9 Periodic Table and Elements
Grade 9 Macromolecules
What is the place called where the substrate will bind to the enzyme?
  1. neuroreceptor
  2. active site
  3. reception area
  4. receiving site
Grade 9 Periodic Table and Elements
Grade 9 Atomic Structure
Which subatomic particle has a positive charge?
  1. proton
  2. neutron
  3. electron
  4. nucleus
Grade 9 Atomic Structure
Grade 9 Macromolecules
What is(are) the reactant(s) called in an enzyme catalyzed reaction?
  1. carbon dioxide and water
  2. inhibitor
  3. active site
  4. substrate
Grade 9 Macromolecules
An enzyme will                          if the pH or temperature is not optimal.
  1. catalyze more reactions
  2. synthesize
  3. denature
  4. become angry and hostile
Grade 9 Macromolecules
Grade 9 Biochemistry
Which are the four most abundant elements in living cells?
  1. carbon, oxygen, nitrogen, sulfur
  2. carbon, oxygen, hydrogen, nitrogen
  3. carbon, oxygen, sulfur, phosphorus
  4. carbon, sulfur, hydrogen, magnesium
Grade 9 Atomic Structure
Why does an atom have no net electric charge?
  1. Its subatomic particles carry no electrical charge.
  2. The positively charged protons cancel out the negatively charged neutrons.
  3. The positively charged neutrons cancel out the negatively charged electrons.
  4. The positively charged protons cancel out the negatively charged electrons.
Grade 9 Periodic Table and Elements
Mendeleev arranged the elements in his Periodic Table in order of
  1. increasing atomic mass
  2. increasing number of electrons
  3. increasing atomic number
  4. increased number of neutrons
Grade 9 Periodic Table and Elements
Grade 9 Biochemical Pathways
Which statement describes cellular respiration?
  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
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