Biology 1002B Lecture Notes - Lecture 13: Rubisco, Carbon Fixation, Non-Competitive Inhibition

• School: Western University
• Department: Biology
• Course: Biology 1002B
• Professor: Tom Haffie Denis Maxwell

Document Summary

Adjust rate of photosynthesis by adjusting level of light. Measurement of co2 in gaseous phase: co2 fixation rate = micromoles of co2 consumed/ min/ cell. Light response curve: rate of co2 fixation/ consumption in the dark is negative (releasing co2) only cellular respiration occurring, photosynthesis and calvin cycle occurring in the light increased rate of co2 fixation. For a plant to grow, the rate of co2 fixation must be above 0: balanced equilibrium light compensation point. Rate of which photosynthesis is brining in co2 is perfectly balanced with the rate at which the mitochondria is respiring. All tubes have same amount of enzyme, different amounts of substrate. Why would you want to facilitate diffusion: normally: rate of transport proportional to rate of solute concentration, by facilitating diffusion greater rates of transport. Facilitated diffusion: only accept certain molecules, time dependent, can be saturated. For certain molecules, the rate with/without facilitated diffusion is the same.