[Campbell Biology P.258] The 'MAKE CONNECTIONS' section asks about hexokinase, an enzyme inv... | Practice Question

The 'MAKE CONNECTIONS' section asks about hexokinase, an enzyme involved in glycolysis, in a plant cell. Considering the information provided on the page regarding cellular processes, where would hexokinase be produced and where would it primarily function in the context of cellular respiration?

  • A: Produced in chloroplasts; functions in the mitochondrion.
  • B: Produced in the vacuole; functions at the plasma membrane.
  • C: Produced in the cytoplasm (by ribosomes); functions in the cytoplasm.
  • D: Produced in the mitochondrion; functions in the mitochondrion.

Explanation

Enzymes like hexokinase are proteins. Protein synthesis as mentioned under point 11's 'protein synthesis and active transport' powered by ATP primarily occurs on ribosomes in the cytoplasm. Glycolysis, the pathway hexokinase initiates, occurs in the cytoplasm. The page mentions 'protein synthesis' as work powered by ATP, implying general protein synthesis location. The 'MAKE CONNECTIONS' section directly refers to hexokinase and glycolysis. Though glycolysis isn't explicitly located on this page, it's a foundational concept in cellular respiration which is Chapter 9, referenced here .