Cellular energetics：練習問題

Which of the following statements correctly describes a feature of enzymes?

The primary function of the reduced coenzyme produced during the light-dependent reactions of photosynthesis is to provide high-energy electrons for which specific step in the Calvin cycle?

In the carbon fixation stage (Calvin cycle) of photosynthesis, the conversion of the 3-carbon compound (3-phosphoglycerate) into triose phosphate is a key step. Which of the following correctly describes the roles of the products from the photochemical reactions in this specific step?

Which of the following statements correctly compares anabolism and catabolism?

A plant is kept in an environment with a constant temperature of \( 25^\circ C \) and a high light intensity. If the rate of photosynthesis does not increase further when light intensity is raised, which of the following is most likely acting as the limiting factor?

Briefly describe the role of the active site in an enzyme-catalysed reaction.

In anaerobic respiration, glycolysis produces ATP and NADH. Explain the critical role of fermentation in allowing glycolysis to continue under these conditions.

In the context of aerobic respiration, explain the metabolic necessity of oxidative phosphorylation for the continued operation of the Krebs cycle in the mitochondrial matrix.

a) Define metabolism.
b) State the primary difference between a catabolic process and an anabolic process.

Describe the main stages of aerobic respiration in a eukaryotic cell, including the specific site within the cell where each stage occurs and the key products (e.g., ATP, NADH, FADH\( _2 \), \( \text{CO}_2 \)) generated in each stage.