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Tenth Grade (Grade 10) Biochemistry Questions

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Grade 10 Biochemical Pathways
Aerobic cellular respiration processes occur in the
  1. cytoplasm.
  2. cell membrane.
  3. mitochondria.
Grade 10 Macromolecules
What gives water many properties that are important to living things?
  1. temperature
  2. hydrogen bonds
  3. density
  4. specific heat
Grade 10 Macromolecules
Which statement about enzymes is NOT true?
  1. Enzymes work best at a specified pH.
  2. All enzymes work inside cells.
  3. Enzymes are proteins.
  4. Enzymes are organic catalysts.
Grade 10 Macromolecules
The bond between two amino acids is
  1. formed by hydrolysis.
  2. an ionic bond.
  3. nonpolar.
  4. a peptide bond.
Grade 10 Biochemical Pathways
What are the three stages of cellular respiration?
  1. glycolysis, Kreb’s cycle, and electron transport chain
  2. glycolysis, Kreb’s cycle, and exocytosis
  3. phagocytosis, Kreb’s cycle, and electron transport chain
Grade 10 Biochemical Pathways
A plant captures the Sun’s rays to make glucose. Which characteristic of life is demonstrated?
  1. cell organization
  2. obtaining energy
  3. homeostasis
  4. reproduction
Grade 10 Biochemical Pathways
Which process occurs in both photosynthesis and respiration?
  1. Chemiosmosis
  2. Glycolysis
  3. Calvin cycle
  4. Krebs cycle
Grade 10 Biochemical Pathways
What is the role of NADP+ in photosynthesis?
  1. It helps produce ATP from the light reactions.
  2. It is the primary electron acceptor.
  3. It forms NADPH to be used in the Calvin cycle.
  4. It forms part of photosystem II.
Grade 10 Biochemical Pathways
Which is a product of the Krebs cycle?
  1. ATP
  2. NADH
  3. FADH2
  4. all of the above
Grade 10 Macromolecules
Proteins are polymers formed from
  1. nucleic acids.
  2. lipids.
  3. carbohydrates.
  4. amino acids.
Grade 10 Biochemical Pathways
Which is a description of NAD+?
  1. product of the citric acid cycle
  2. electron carrier in photosynthesis
  3. electron carrier in cellular respiration
  4. also called photosystem II
  5. also called photosystem I
Grade 10 Biochemical Pathways
Both plants and animals use                          and give off                          during respiration.
  1. nitrogen; oxygen
  2. nitrogen; carbon dioxide
  3. oxygen; carbon dioxide
  4. oxygen; nitrogen
Grade 10 Macromolecules
Which statement is true about enzymes?
  1. They act on nonspecific, randomly chosen substrates.
  2. After a reaction, they cannot be reused.
  3. They can speed up metabolic processes in the body.
  4. They cannot change shape.
Grade 10 Biochemical Pathways
What is the purpose of ATP?
  1. provide chemical energy to the cells
  2. complete the photosynthesis process
  3. process carbon dioxide
Grade 10 Macromolecules
A molecule that contains a sugar, phosphate, and a nitrogen base is a
  1. RNA.
  2. codon.
  3. nucleotide.
  4. messenger RNA.
Grade 10 Macromolecules
The main enzyme involved in linking individual nucleotides into DNA molecules is
  1. transfer RNA.
  2. ribose.
  3. RNA polymerase.
  4. DNA polymerase.
Grade 10 Macromolecules
What do fats do?
  1. store energy
  2. speed up chemical reactions
  3. insulate the body
  4. both a and c
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