BIOL 1201 : Exam 3 Notes

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azuremammoth471

15 Mar 2019

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Where did most of the mass (dry weight) of this tree come from? (think about photosynthesis) Photosynthesis: 6co2+ 12 h2o + light 6o2+ c6h12o6 +6h2o, convert 2 low energy molecules into a high energy molecule. What is the fate of the oxygen in the water: cycles into new oxygen. The calvin cycle (dark reactions) occur in the: stroma. What are the inputs to the calvin cycles: co2, atp, and nadph + h+ What are the outputs of the calvin cycles: g3p, adp, and nadp+ Where do we get the energy for the calvin cycle from: light reactions. Which of the following best describes the light reactions: capture light energy in to glucose. Photosystem: a collection of several hundred pigment molecules in the thylakoid membrane. Special versions of chlorophyll a (p700 of p680) Thylakoid/thylakoid membrane-the green that you see in a leaf is where all the pigments are. Stack of thylakoids is called a granum.

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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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-The absorption spectrum of a pigment is:

A) how strongly various wavelenghts of light that are absorbed.

B) all the wavelengths of light that are relfected

C) how much light energy is lost as heat

D) how much light energy is transformed into sugar

-What of the following are TRUE of the Calvin Cycle or light independent reactions of photosynthesis.

A) pathway that produces simple sugar

B) pathway that requires carbon dioxide, ATP, and NADPH

C) water is split and oxygen is released in the air as by-product.

D) pathway that occurs in the fluid filled stroma of the chloroplasts.

-plants have evolved to harness just one small part of the sun's energy for photosynthesis. which is it?

A) gamma rays

B) radiowaves

C) UV light

D) heat

E) visible light

-enzymes have a groove with unique shape where a specific reactants fit and bonds are broken and/or reformed to produce new products. this spot where a reaction accurs is called the:

A) substrate

B) active site

C) hot spot

D) allosteric site

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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