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Ninth Grade (Grade 9) Biochemistry Questions

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Grade 9 Biochemical Pathways
The process carried out by yeast that causes bread dough to rise is called
  1. alcoholic fermentation
  2. cellular respiration
  3. lactic acid fermentation
  4. mitosis
Grade 9 Biochemical Pathways
Photosynthesis is the process in which a plant
  1. converts sunlight to chemical energy
  2. utilizes carbon dioxide and releases oxygen
  3. produces a sugar called glucose
  4. all of the above
Grade 9 Biochemical Pathways
Grade 9 Biochemical Pathways
The process that obtains energy from food when oxygen is present is
  1. cellular respiration
  2. ATP synthase
  3. photosynthesis
  4. anaerobic respiration
Grade 9 Biochemistry
In living cells, which four elements are considered to be the most abundant?
  1. carbon, oxygen, nitrogen, and sulfur
  2. carbon, oxygen, hydrogen, and nitrogen
  3. carbon, oxygen, sulfur, and phosphorus
  4. carbon, sulfur, hydrogen, and magnesium
Grade 9 Macromolecules
Grade 9 Biochemical Pathways
What is the type of anaerobic respiration that humans perform?
  1. Diffusion
  2. Lactic Acid Fermentation
  3. Alcoholic Fermentation
  4. Aerobic Fermentation
Grade 9 Biochemical Pathways
Which type of cellular respiration has Krebs Cycle as one of its steps?
  1. Anerobic Respiration
  2. Kreb Respiration
  3. Photosynthesis
  4. Aerobic Respiration
Grade 9 Macromolecules
DNA and RNA are examples of what type of macromolecule?
  1. proteins
  2. nucleic acids
  3. carbohydrates
  4. lipids
Grade 9 Macromolecules
The two primary kinds of nucleic acids are called
  1. nitrogen and phosphorus
  2. oxygen and carbon
  3. DNA and RNA
  4. carbon and hydrogen
Grade 9 Biochemical Pathways
Grade 9 Macromolecules
Although carbohydrates and lipids have different functions, the same elements are present in both. Which elements are found in both carbohydrates and lipids?
  1. carbon, nitrogen, and oxygen
  2. carbon, hydrogen, and oxygen
  3. carbon, nitrogen, hydrogen, and oxygen
  4. nitrogen, hydrogen, and oxygen
Grade 9 Biochemical Pathways
The elements or compounds produced by a chemical reaction are called
  1. reactants
  2. catalysts
  3. products
  4. activation energies
Grade 9 Biochemical Pathways
Which process converts nitrogen gas into a solid?
  1. Conjugation
  2. Sublimation
  3. Nitrogen fixation
  4. Condensation
Grade 9 Biochemical Pathways
The electron transport chain uses the high-energy electrons from the Krebs cycle to
  1. make glucose
  2. convert glucose to pyruvic acid
  3. concert pyruvic acid to citric acid
  4. move [math]"H"^"+"[/math] ions across the inner mitochondrial membrane
  5. convert ADP into ATP
Grade 9 Biochemical Pathways
What is the main difference between aerobic and anaerobic respiration?
  1. Anaerobic respiration requires oxygen
  2. Aerobic respiration requires oxygen
  3. Aerobic respiration requires carbon dioxide
  4. Anaerobic respiration requires carbon dioxide
Grade 9 Biochemical Pathways
What is the step in aerobic respiration that is also necessary in anaerobic respiration?
  1. Glycolysis
  2. Prep Step
  3. Krebs Cycle
  4. Oxidated Phosphorylation
Grade 9 Biochemical Pathways
When fermentation occurs in the absence of oxygen, it is
  1. aerobic
  2. cyclic
  3. anaerobic
  4. oxygen-rich
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