BIOL 2107K Lecture Notes - Lecture 10: Accessory Pigment, Chlorophyll, Photosynthetic Reaction Centre

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21 Jul 2016

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Photosynthesis involves a conversion of energy from one form to another. Energy of sunlight is captured and used to convert carbon dioxide and water into carbohydrates and oxygen gas. Photosynthesis can be broken down into two sets of reactions, light-dependent and light- independent. Uses the atp and nadph (plus co2) to produce carbohydrates. Absorption- molecule acquires the energy of the photon. The molecule goes from ground state to excited state. Transmission- photon is passed through the molecule. Chlorophylls a and b; accessory pigments- absorb in red and blue regions, transfer the energy to chlorophylls (carotenoids and phycobilins) A pigment molecule must absorb a photon of light. Goes from a ground state to an excited state. Use the energy in the light dependant reaction (atp and nadph) The calvin cycle is considered a cycle because the starting reagent is regenerated during the process. In order to turn the cycle , 6 molecules of co2 enter the cycle.

Related Questions

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. All of the following are correct descriptions of photosynthesis except:

A) The Calvin Cycle is endergonic.

B) Electrons are supplied to the reaction center via the splitting of water, which yields O2 as a byproduct

C) Chlorophyll and accessory pigments capture energy from the sun in the form of electrons, which they use to drive the electron transport chains of photosystems I and II.

D) ATP and NADPH generated in the light-dependent reactions are used to power CO2 fixation via the Calvin cycle in the light-independent reactions.

2. In glycolysis and the TCA cycle, glucose is _____ down to CO2; this process _____ lots of ATP and reducing power. In photosynthesis, CO2 is ______ back to sugar by the _______ of lots of ATP and reducing power.

A) reduced; requires; oxidized; production

B) oxidized; requires; reduced; production

C) oxidized; produces; reduced; input

D) reduced; produced; oxidized; input

3. Which description accurately compares cellular respiration and photosynthesis?

A) Photosynthesis uses energy captured from sunlight to power the reduction of carbon dioxide to sugars; cellular respiration oxidizes sugars to yield energy for the cell.

B) The ATP produced via cellular respiration is needed to power the reactions of photosynthesis

C) The pathways of photosynthesis are those of cellular respiration run in reverse.

D) Photosynthesis captures energy from sunlight to oxidize carbon dioxide to sugars; cellular respiration reduces these sugars to yield energy for the cell.

Which of the following is not a product of the light reactions of photosynthesis?

		oxygen
		ATP
		sugar
		NADPH

All of the following colors of light are used for photosynthesis except

		orange
		green
		violet
		blue

If you are heterozygous for sickle-cell anemia, you will be more likely to get malaria.

True

False

Asexual reproduction produces genetically identical individuals because

		cell division occurs only in meiosis
		no meiosis or fertilization take place
		chromosomes do not have to replicate during asexual reproduction
		it involves chromosome replication without cytokinesis

Animals inhale air containing oxygen and exhale air with less oxygen and more carbon dioxide. Plants use the carbon dioxide to make

		ATP
		water
		oxygen
		sugar

When does crossing over occur?

		prophase I
		metaphase I
		prophase II
		anaphase I

BIOL 2107K Lecture Notes - Lecture 10: Accessory Pigment, Chlorophyll, Photosynthetic Reaction Centre

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