100cps7.s09

100cps7.s09 - Biochemistry & Molecular Biology 100C...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Biochemistry & Molecular Biology 100C Spring, 2009 Problem Set #7 Due: June 5. 1. Most modern flowering plants are termed „C 3 plants‟. (a) Why? (b) Out of more than 30,000 known flowering plants species, some 600 are termed “C 4 plants”. What is the defining biochemical property of C 4 plants? (c) In leaf tissue of C 4 plants, two types of photosynthetic cells, mesophyll and bundle-sheath, are both physically and functionally distinct. How do the dark-reactions in mesophyll and bundle-sheath tissue differ? (d) How do the light-reactions in mesophyll and bundle-sheath tissue differ? (e) Moving to Pat and Vanna‟s game board of inductive reasoning: for C 4 photosynthesis, what is the point of this division of labor? (f) Compare photosynthetic strategies of C 3 and C 4 plants. In relative terms, how might C 4 plants be at a competitive advantage? (h) Why, then, do C 4 plants number less than 2% of all flowering plant species? 2. In C 4 plants, leaf mesophyll cells possess a pyruvate-phosphate dikinase (PPdK) activity: pyruvate + P i + ATP PEP + 5´AMP + PP i (a) Are you surprised by this observation? Why or why not? (b) Calculate ΔG°´ for the PPdK
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

100cps7.s09 - Biochemistry & Molecular Biology 100C...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online