BILD 1 Lecture Notes - Lecture 19: Photosystem Ii, Light-Independent Reactions, Photosystem I

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byzantiumfly635

26 Apr 2016

School

UCSD

Department

Biology/Lower Division

Course

BILD 1

Professor

Stephanie Mel

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Document Summary

The space within the cell below the inner membrane is called the stroma. Photosynthesis stores energy in complex organic molecules, whereas respiration releases it. Receives nadp+ and adp + p back from the calvin cycle. A photosystem harvests light in the thylakoid membrane. Atp and the nadph created from the light reactions are transferred to this cycle. How light reactions occur (happen in the thylakoid membrane) Then releases the energy as it becomes less excited (photosystem ii) The photon gets transferred from one pigment to the next. Eventually will activate two special chlorophyll (main pigment molecules that are associated with the photosynthesis process) Boosts up an electron into the chloroplast and an electron receptor. There is an electron hole left behind when the electron leaves. Filled by the electrons from h2o which breaks down and oxygen is left behind (photolysis) Once the electron is released, it activates the electron transport chain (same as respiration)

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Matching: Choose the BEST answer to complete each matchingstatement. There is one correct answer for each fill in the blank.Use of letters to answer is fine.

Choices A). Oxygen F). Water K.) ADP P.) AbsorbU.) Stroma of Chloroplast B.) NADP G.) NADPH L). ATP Q.) ReleaseV.) Transpiration C.) Close H.) Open M.) Nitrogen R.) Glucose W.)Thylakoid Membranes D.) Electrons I.) Stomata N.) AMP S.) SunlightX.) Light Reaction E.) Carotenoids J.) Carbon Dioxide O.)Chlorophyll T.) Dark Reaction Y.) Hydrogen ion

1. List the reactants of the light reactions.

2. List the products of the light reactions

3. List the reactants of the dark reactions (Calvin BensonCycle).

4. List the products of the dark reactions (Calvin BensonCycle).

5. In the light reactions (a) is split releasingthese three things (b)

6. (a) for the dark reactions (Calvin Benson cycle) is obtainedby opening the (b) .

7. (a) is lost to the environment through the open (b)

8. The light reactions occur on/in the .

9. The dark reactions (Calvin Benson cycle) occur on/in the.

10.(a) absorb additional wavelengths of light and protect (b)from damage.

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Question 1 The membrane structures inside the chloroplast are called the ______, while the fluid surrounding the stacks of membrane is called the ______.
a. stroma; thylakoid
b. thylakoid; cytosol
c. thylakoid; stroma
d. thylakoid; matrix
e. matrix; thylakoid

Question 2 What is considered the ultimate source of energy for living things on Earth?
a. the sun
b. electrons
c. green plants
d. oxygen
e. ATP

Question 3 Why do most plant leaves appear green?
a. They contain a lot of starch which has a green color.
b. They have chloroplasts which absorb green light for photosynthesis.
c. During the light reaction phase carbon dioxide is converted to oxygen which emits green light.
d. They have chloroplasts which absorb all colors of light except for green, which is reflected.
e. During the dark reaction phase water is converted to oxygen which emits green light.

Question 4 Plants perform only photosynthesis, not respiration. True False

Question 5 What is the primary purpose of the light reactions of photosynthesis?
a. to create oxygen gas
b. to produce glucose
c. to convert solar energy to chemical energy (in the form of ATP and NADPH) to power the dark reactions
d. to remove carbon dioxide gas from the atmosphere
e. to create water

Question 6 The light dependent reactions occur in the:
a. mitochondrial membrane.
b. mitochondrial matrix.
c. stroma.
d. thylakoid membrane.
e. cytosol.

Question 7 The energy to run the dark reactions of photosynthesis is produced _________.
a. by the CO2 initially used in the dark reactions.
b. during glycolysis
c. during the light reaction phase
d. during the Krebs cycle
e. during anaerobic respiration

Question 8 Which of the following substances could be totally eliminated and not interfere with the process of photosynthesis?
a. O2
b. H2O
c. light
d. CO2

Question 9 What product(s) do plants produce during photosynthesis that is/are used by humans and other animals?
a. carbon dioxide
b. carbon dioxide and water
c. glucose and oxygen
d. glucose
e. oxygen

Question 10 Only plants can carry out photosynthesis. True False

Question 11 During the light reactions of photosynthesis, ...
a. oxygen is produced from H2O.
b. glycolysis occurs.
c. the Krebs cycle occurs.
d. CO2 is combined into glucose.
e. ATP is broken down to ADP + P

Question 12 The reactants of photosynthesis are:
a. sugar.
b. sugar and water.
c. O2 and CO2
d. O2 and sugar.
e. CO2 and water.

Question 13 During the dark reaction phase of photosynthesis in plants...
a. ATP is created.
b. H+ ions are moved into the stroma from the matrix.
c. molecules of CO2 are combined into sugar.
d. H2O is split into oxygen and H+.
e. solar energy is converted to chemical energy.

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13.

Carbon fixation in plants refers to _____.

the reaction between any two carbon containing molecules.

the breakdown of glucose.

the synthesis of carbon dioxide.

the reaction between carbon dioxide and RuBP.

14.

The electrons that are excited by light energy in photosystems II and I are eventually used to_____.

breakdown RuBP

convert glucose to carbon dioxide

breakdown starch into glucose

reduce NADP+ to NADPH

15.

The light reaction of photosynthesis occurs in the ______.

thylakoid membranes

stroma

cytoplasm

matrix

16.

The final product of the Calvin cycle is ______.

		citrate
		G3P (glyceraldehyde 3-phosphate)
		lactate
		pyruvate

BILD 1 Lecture Notes - Lecture 19: Photosystem Ii, Light-Independent Reactions, Photosystem I

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