Exam3Review - Exam Three Review Chapter 10 Photosynthesis...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Exam Three Review Chapter 10: Photosynthesis - Chloroplasts o Average plant cell has 10 to 100 o Found in the mesophyll (tissue in interior of leaf) o Take in O 2 through pores called stomata o Parts Double membrane Stroma: dense fluid (like cytoplasm) Thylakoids: little sacs Stacked in columns called grana Chlorophyll: green pigment in thylakoid membrane Thylakoid space: H + reservoir - Light o Visible: whatever color is reflected is seen o Chlorophyll Chlorophyll a: blue-green color (reflects this) Chlorophyll b: olive-green color (reflects this) Carotenoids: yellows and oranges (reflect these) Protect plants from sunburn o Photosystem Reaction-center complex surrounded by several light-harvesting complexes Provides more area and wider range to absorb max energy - Photosynthesis o Not just plants; cyanobacteria is a prokaryote that uses o 6 CO 2 + 12 H 2 O + light energy C 6 H 12 O 6 + 6 O 2 + 6 H 2 O Actually produces three-carbon sugar used to make glucose Water gets split CO 2 is reduced; H 2 O is oxidized o Light Cycle Location: thylakoid membrane Process o Water is split, provides H + and electrons, gives off O 2 o Add one H + and two electrons to NADP + for NADPH o Light energy adds P group to ADP for ATP Photosystem II
Image of page 1

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

View Full Document Right Arrow Icon
o Photon hits chlorophyll in light-harvesting complex, raising electron energy level energy is passed down a chain till reaches reaction center complex and pair of special chlorophyll molecules o electron transferred to primary electron receptor o enzyme splits H 2 O two electrons to replace those in special chlorophylls two hydrogen to the thylakoid lumen oxygen binds with oxygen and is given off as waste o electrons from receptor move down ETC to photosystem I provides energy for ATP synthesis Photosystem I o Light energy excites light-harvesting compounds, which excite reaction center complex to acceptor o Pass electrons to electron receptor, leaving chlorophyll pair ready to accept electron from photosystem II o Pass electrons down another ETC to protein called ferredoxin (Fd) No gradient produced here, so no ATP o Enzyme transfers electrons from Fd to NADP + Takes 2 electrons before going to Calvin cycle Takes H + from stroma Cyclic electron flow: alternative path using only photosystem I o Only produces ATP – releases at the intake of photosystem I rather than using to make NADPH Materials in H 2 O NADP + ADP Light energy Products O 2 (waste) ATP NADPH o
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern