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Tenth Grade (Grade 10) Biochemical Pathways Questions

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Grade 10 Biochemical Pathways
What organisms must carry out cellular respiration?
  1. autotrophs
  2. heterotrophs
  3. prokaryotes
  4. eukaryotes
  5. all of the above
Grade 10 Biochemical Pathways
What is the process of capturing solar energy?
  1. photosynthesis
  2. cellular respiration
  3. metabolism
  4. homeostasis
Grade 10 Biochemical Pathways
Which statement best describes the role of glucose in the energy cycle?
  1. As the product of photosynthesis, it connects the energy in biological molecules to abiotic sources like the Sun.
  2. As a reactant in respiration, it is a source of energy for the chemical reactions that make life processes possible.
  3. As a catalyst for ATP, it is required for the cell to carry out its functions.
  4. Both a and b
  5. None of the above
Grade 10 Biochemical Pathways
What function does water play in the process of photosynthesis?
  1. Water molecules are combined with carbon atoms to form glucose.
  2. Water molecules are the source of energy in the light reactions.
  3. Water molecules are split to provide electrons for chlorophyll and hydrogen ions.
  4. Water molecules are used to carry energy into the Calvin cycle.
Grade 10 Biochemical Pathways
The Krebs cycle begins when pyruvic acid produced by glycolysis enters the
  1. carbon atom.
  2. air.
  3. mitochondrion.
  4. chloroplast.
Grade 10 Biochemical Pathways
In what part of the chloroplast does the Calvin cycle happen?
  1. thylakoid
  2. stroma
  3. stomata
  4. nucleus
Grade 10 Biochemical Pathways
What is the main purpose of the electron transport chain?
  1. use high-energy electrons from other cycles to convert ADP into ATP
  2. maintain a stable balance of high-energy electrons
  3. constantly distribute electrons throughout the cell
  4. tell the cell when glycolysis should stop or start
Grade 10 Biochemical Pathways
What is the step required before cellular respiration, and what is the importance of this step?
  1. Photosynthesis is required, because it provides molecules for the first stage of cellular respiration.
  2. Glycolysis is required, because it provides molecules for the first stage of cellular respiration.
  3. Fermentation is required, because it provides the first energy for the first of cellular respiration.
  4. There is no step before cellular respiration.
Grade 10 Biochemical Pathways
Where are the proteins of the electron transport chain located?
  1. cytosol
  2. mitochondrial outer membrane
  3. mitochondrial inner membrane
  4. mitochondrial matrix
Grade 10 Biochemical Pathways
The process that generates carbohydrates from Sun energy and basic chemicals is
  1. photosynthesis.
  2. active transport.
  3. glycolysis.
Grade 10 Biochemical Pathways
Which statement concerning fermentation is true?
  1. Fermentation produces additional ATP.
  2. Fermentation occurs in either aerobic or anaerobic conditions.
  3. The end product of fermentation in human cells is ethanol.
  4. Fermentation, like glycolysis, occurs in the cytoplasm of cells.
Grade 10 Biochemical Pathways
When a phosphate group is added to an ADP molecule, what is produced?
  1. glucose
  2. BAC
  3. chlorophyll
  4. ATP
Grade 10 Biochemical Pathways
Hydrolysis of a triglyceride produces
  1. many amino acids.
  2. different types of nucleotides.
  3. fatty acids and glycerol.
  4. monosaccharides.
Grade 10 Biochemical Pathways
What is the role of ATP and NADPH in the Calvin cycle?
  1. to stack together and form a glucose molecule
  2. to split glucose into pyruvic acid
  3. to carry energy from the light reactions, which will be stored in glucose
  4. to split a water molecule and produce oxygen
  5. to replace electrons in chlorophyll
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