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Tenth Grade (Grade 10) Biochemistry Questions

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Grade 10 Macromolecules
What type of macromolecule is a polysaccharide?
  1. protein
  2. nucleic acid
  3. carbohydrate
  4. steroid
  5. fat
Grade 10 Biochemical Pathways
What is the process that most organisms use to access the energy needed for the activities of life?
  1. photosynthesis
  2. active transport
  3. diffusion
  4. cellular respiration
Grade 10 Macromolecules
All organic molecules are based on the element of
  1. carbon.
  2. hydrogen.
  3. sulfur.
  4. nitrogen.
Grade 10 Biochemical Pathways
What are the reactants of cellular respiration?
  1. glucose and oxygen
  2. oxygen and carbon dioxide
  3. water and oxygen
  4. glucose and carbon dioxide
Grade 10 Macromolecules
With an enzyme the activation energy is
  1. lowered.
  2. raised.
  3. not affected.
Grade 10 Biochemical Pathways
The last stage of aerobic respiration is
  1. the light reaction.
  2. the Krebs cycle.
  3. the Calvin cycle.
  4. electron transport.
Grade 10 Biochemical Pathways
What do both plants and animals use oxygen for?
  1. respiration
  2. breathing
  3. photosynthesis
  4. transpiration
Grade 10 Macromolecules
An enzyme's activation energy is
  1. heat energy.
  2. a substrate.
  3. the energy needed to cause a chemical reaction.
Grade 10 Macromolecules
What is one use of glucose?
  1. to power photosynthesis
  2. to make cellulose in cell walls
  3. to make cell membranes
  4. to capture sunlight
Grade 10 Biochemical Pathways
What is released during cellular respiration?
  1. oxygen
  2. energy
  3. salt
  4. light
Grade 10 Macromolecules
Which class of macromolecules store and communicate genetic information?
  1. carbohydrates
  2. lipids
  3. proteins
  4. nucleic acids
Grade 10 Biochemical Pathways
Which is a description of cellular respiration?
  1. aerobic production of ATP from glucose
  2. inhibition of the enzyme that produces prostaglandins
  3. oxidation of glucose to produce two pyruvate molecules
  4. exchange of gases by the lungs
  5. blocking of active site of enzymes in bacteria that make cell walls
Grade 10 Biochemical Pathways
Chemical energy is used to produce carbohydrates in the process of
  1. photosynthesis.
  2. respiration.
  3. chemosynthesis.
  4. mitosis.
Grade 10 Macromolecules
Large organic molecules are called
  1. polymers.
  2. carbohydrates.
  3. micromolecules.
  4. macromolecules.
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
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 Biochemical Pathways
The Krebs cycle occurs in the
  1. chloroplast.
  2. mitochondria.
  3. cytoplasm.
  4. endoplasmic reticulum.
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