BIOL 201 Lecture Notes - Absorption Spectroscopy, Carbon Fixation, Light-Independent Reactions

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champagnespider445

19 Apr 2012

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Photosynthetic organisms capture light energy (the ultimate source of biological energy) and use it to: acceptor molecules. Transfer h atoms from acceptors to carbons derived from co2 to form glucose (process known as carbon fixation: net reaction: Reduction of co2: oxidation of h2o absorption of light. 2 h2o + 2 nadp+ + 3 adp + 3 pi. O2 + 2 h+ + 2 nadph + 3 atp. Co2 + 2 h+ + 2 nadph + 3 atp. Ch2o + h2o + 2 nadp+ + 3adp + 3 pi. Later and in a subset of eukaryotic: double membrane organelles with own genome diagnostic transferred to the nucleus. Light absorption and energy transformation can be measured via: Chlorophyll a: peaks at 430 and 650 nm. E. g. levels of o2 released by by wavelength. Returns to ground state by emitting a less energetic photo (fluorescence) or heat.

Related Questions

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

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.

coffeelion96

1.The name of the process whereby a plant uses oxygen in light.

	transpiration
	translocation
	photophosphorylation
	photorespiration
	photosynthesis

2.Photon energy, captured by chlorophyll a, is transferred as chemical energy to

	carbon dioxide
	glucose
	other chlorophylls
	carotenoids
	a series of hydrogen acceptors

3.Photosynthesis is important to the planet because it releases

	both ATP and oxygen
	oxygen
	carbon dioxide
	NADH
	ATP

amaranthfrog191

BIOL 201 Lecture Notes - Absorption Spectroscopy, Carbon Fixation, Light-Independent Reactions

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