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    approximately what wavelength of light is best absorbed by chlorophyll a, the pigment that participates directly in the light reactions?

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    bio chp. 8 Flashcards

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    6 CO2 + 6 H2O → C6H12O6 + 6 O2

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    What is the equation for photosynthesis?

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    stroma

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    Where does the Calvin cycle occur?

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    Terms in this set (23)

    6 CO2 + 6 H2O → C6H12O6 + 6 O2

    What is the equation for photosynthesis?

    stroma

    Where does the Calvin cycle occur?

    water ... NADPH

    The light reactions of photosynthesis use _____ and produce _____.

    thylakoid

    Each of a number of flattened sacs inside a chloroplast, bounded by pigmented membranes on which the light reactions of photosynthesis take place, and arranged in stacks or grana.

    chloroplast

    (in green plant cells) a plastid that contains chlorophyll and in which photosynthesis takes place.

    red, green

    _____ has a longer wavelength than _____.

    435 nm

    Approximately what wavelength of light is best absorbed by chlorophyll a, the pigment that participates directly in the light reactions?

    455 nm

    Which wavelength of light is best absorbed by chlorophyll b?

    They absorb blue/green light and reflect yellow and red wavelengths of light.

    You obtain the pigments called carotenoids in your diet when you eat carrots. Why do carotenoids appear yellow and orange?

    One cannot tell from this graph, but because chlorophyll a does absorb red light, we can predict that it would be effective in driving photosynthesis.

    Can you tell from these absorption spectra whether red light is effective in driving photosynthesis?

    The graph indicates that chlorophyll a absorbs very little blue light, so we can predict that blue light would not be effective.

    If only chlorophyll a were involved in the light reactions, would blue light (wavelength about 490 nm) be effective in driving photosynthesis?

    These pigments are able to absorb more wavelengths of light (and thus more energy) than chlorophyll a alone can absorb. As part of light-harvesting complexes in photosystems, they broaden the range of light that can be used in the light reactions.

    An action spectrum plots the rate of photosynthesis at various wavelengths of visible light, and it shows that blue light with a wavelength of about 490 nm is effective in driving photosynthesis. Based on this information and the absorption spectra shown at left, what role may chlorophyll b and carotenoids play in photosynthesis?

    photosystem I

    Energized electrons from ____ enter an electron transport chain and are then used to reduce NADP+.

    photosystem II

    _____ splits water into 1/2 O2, H+, and e- .

    ATP synthase phosphorylates ADP.

    Which of these phosphorylates ADP to make ATP?

    electrons

    _____ releases energy that is used to pump hydrogen ions from the stroma into the thylakoid compartment.

    photosystems

    Chlorophyll can be found in _____.

    Photophosphorylation

    Which term describes ATP production resulting from the capture of light energy by chlorophyll?

    false

    True or false? The chemiosmotic hypothesis states that the synthesis of ATP generates a proton gradient that leads to electron flow through an electron transport chain.

    Proton gradient

    According to the chemiosmotic hypothesis, what provides the energy that directly drives ATP synthesis?

    protons

    Which of the following particles can pass through the ATP synthase channel?

    false

    True or false? The region of ATP synthase that catalyzes the production of ATP from ADP and inorganic phosphate spans the chloroplast membrane.

    ATP will not be produced because there is no ADP and inorganic phosphate in the solution.

    Chloroplast membrane vesicles are equilibrated in a simple solution of pH 5‎ . The solution is then adjusted to pH 8‎ . Which of the following conclusions can be drawn from these experimental conditions?

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    Chapter 10

    Study Chapter 10- Photosynthesis Part A flashcards. Play games, take quizzes, print and more with Easy Notecards.

    Chapter 10- Photosynthesis Part A Flashcards

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    Plants are photoautotrophs. What does this mean?

    They use light energy to drive the synthesis of organic molecules from inorganic materials.

    The ultimate source of energy to support most life on Earth is _____.

    sunlight

    Drag the labels from the left to their correct locations in the concept map on the right. Not all labels will be used.

    Which of these equations best summarizes photosynthesis?

    6 CO2 + 6 H2O → C6H12O6 + 6 O2

    Where does the Calvin cycle occur?

    E Stroma

    The light reactions of photosynthesis use _____ and produce _____.

    water ... NADPH NADPH is a reactant in the Calvin cycle.

    Identify the chloroplast.

    A

    Identify the stroma.

    E

    Identify a thylakoid.

    D

    The photosynthetic membranes are found in the _____ in plant cells.

    chloroplasts An elaborate system of interconnected thylakoid membranes segregates the stroma from the thylakoid space in the chloroplast.

    When oxygen is released as a result of photosynthesis, it is a direct by-product of

    splitting water molecules.

    Approximately what wavelength of light is best absorbed by chlorophyll a, the pigment that participates directly in the light reactions?

    435 nm

    Which wavelength of light is best absorbed by chlorophyll b?

    455 nm

    You obtain the pigments called carotenoids in your diet when you eat carrots. Why do carotenoids appear yellow and orange?

    They absorb blue/green light and reflect yellow and red wavelengths of light.

    Can you tell from these absorption spectra whether red light is effective in driving photosynthesis?

    One cannot tell from this graph, but because chlorophyll a does absorb red light, we can predict that it would be effective in driving photosynthesis.

    If only chlorophyll a were involved in the light reactions, would blue light (wavelength about 490 nm) be effective in driving photosynthesis?

    The graph indicates that chlorophyll a absorbs very little blue light, so we can predict that blue light would not be effective.

    An action spectrum plots the rate of photosynthesis at various wavelengths of visible light, and it shows that blue light with a wavelength of about 490 nm is effective in driving photosynthesis. Based on this information and the absorption spectra shown at left, what role may chlorophyll b and carotenoids play in photosynthesis?

    These pigments are able to absorb more wavelengths of light (and thus more energy) than chlorophyll a alone can absorb. As part of light-harvesting complexes in photosystems, they broaden the range of light that can be used in the light reactions.

    Which term describes ATP production resulting from the capture of light energy by chlorophyll?

    Photophosphorylation The excitation of chlorophyll by light energy initiates a chain of events that leads to ATP production.

    True or false? The chemiosmotic hypothesis states that the synthesis of ATP generates a proton gradient that leads to electron flow through an electron transport chain.

    False

    According to the chemiosmotic hypothesis, what provides the energy that directly drives ATP synthesis?

    Proton gradient A proton gradient across chloroplast and mitochondrial membranes drives ATP synthesis by the enzyme ATP synthase.

    Which of the following particles can pass through the ATP synthase channel?

    Protons

    True or false? The region of ATP synthase that catalyzes the production of ATP from ADP and inorganic phosphate spans the chloroplast membrane.

    False

    Chloroplast membrane vesicles are equilibrated in a simple solution of pH 5. The solution is then adjusted to pH 8. Which of the following conclusions can be drawn from these experimental conditions?

    ATP will not be produced because there is no ADP and inorganic phosphate in the solution.

    Which wavelengths of light drive the highest rates of photosynthesis? Select the two best answers.

    400-450 nm 670-680 nm

    input and output of light reactions

    input: light, ADP, NADP+, water

    output: O2, ATP, NADPH

    Calvin cycle input and output:

    Input: Co2, ATP, NADPH

    Output:G3p, ADP, NADP+

    In the light reactions, light energy is used to oxidize

    H20 to O2

    The Electrons derived from this oxidation reaction in the light reactions are used to reduce

    NADP+ to NADPH

    The Calvin cycle oxidizes the light reactions product

    NADPH to NADP+

    The electrons derived from this oxidation reaction in the calvin cycle are used to reduce

    CO2 to G3p

    Source : www.easynotecards.com

    what wavelengths does chlorophyll a absorb

    Chlorophyll a absorbs violet and orange light the most. Chlorophyll b absorbs mostly blue and yellow light. They both also absorb light of other wavelengths

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    what wavelengths does chlorophyll a absorb

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    December 10, 2021 7 minutes read

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    Contents

    1 What Wavelengths Does Chlorophyll A Absorb?

    2 What wavelength does chlorophyll a absorb best?

    3 What wavelengths of light do chlorophyll a and chlorophyll b absorb best?

    4 What is absorbed by the chlorophyll?

    5 Why does chlorophyll absorb at two different wavelengths?

    6 What are the two main wavelengths absorbed by chlorophyll?

    7 Which wavelengths of light are absorbed by chlorophyll check all that apply?

    8 Which wavelength S of light is are best absorbed by the chlorophyll in plants quizlet?

    9 What wavelength of light does chlorophyll b absorb?

    10 When a photon is absorbed by chlorophyll?

    11 What wavelengths drive photosynthesis?

    12 Which wavelength of electromagnetic radiation is absorbed efficiently by chlorophyll for photosynthesis?

    13 What does the absorption spectrum of chlorophyll demonstrate?

    14 What wavelength does carotene absorb?

    15 How does the absorption spectrum of chlorophyll A differ from that of chlorophyll b?

    16 Why does chlorophyll not absorb green light?

    17 Which wavelength of light is absorbed maximum for photosynthesis?

    18 What wavelength of light is best absorbed by chlorophyll a the pigment that participates directly in the light reactions?

    19 When a photon of light is absorbed by an atom in a chlorophyll molecule?

    20 What wavelength does Green absorb?

    21 What light is best absorbed by chlorophyll?

    22 How does chlorophyll absorb light?

    23 What does photosystem 1 absorb?

    24 Why do chloroplasts absorb photons?

    25 How are solar photons absorbed during photosynthesis?

    26 Which metal ion is a constituent of chlorophyll?

    27 What wavelengths do plants use?

    28 Why are red and blue wavelengths best for photosynthesis?

    29 Which wavelengths of light are the most effective in photosynthesis and why?

    30 How do different wavelengths of light affect photosynthesis?

    31 What does the absorption spectrum of chlorophyll demonstrate quizlet?

    32 What is an absorption spectrum IB Biology?

    33 How absorption spectrum is formed?

    34 What wavelengths does anthocyanin absorb?

    35 The Magical Leaf: The Quantum Mechanics of Photosynthesis

    36 Absorption in the visible region | Spectroscopy | Organic chemistry | Khan Academy

    37 Leaf Pigments and Light

    38 Plant Pigments

    What Wavelengths Does Chlorophyll A Absorb?

    Chlorophyll a absorbs violet and orange light the most. Chlorophyll b absorbs mostly blue and yellow light. They both also absorb light of other wavelengths with less intensity.Apr 5, 2015

    What wavelength does chlorophyll a absorb best?

    All plants, however, has chlorophyll a, which absorbs most strongly at ~450 nm, or a bright blue color. This wavelength is strong in natural sunlight, and somewhat present in incandescent lights, but is very weak in traditional fluorescent lights.

    What wavelengths of light do chlorophyll a and chlorophyll b absorb best?

    Each type of pigment can be identified by the specific pattern of wavelengths it absorbs from visible light, which is the absorption spectrum. Chlorophyll a absorbs light in the blue-violet region, while chlorophyll b absorbs red-blue light.

    What is absorbed by the chlorophyll?

    Chlorophyll’s job in a plant is to absorb light—usually sunlight. The energy absorbed from light is transferred to two kinds of energy-storing molecules. Through photosynthesis, the plant uses the stored energy to convert carbon dioxide (absorbed from the air) and water into glucose, a type of sugar.

    Why does chlorophyll absorb at two different wavelengths?

    As shown in detail in the absorption spectra, chlorophyll absorbs light in the red (long wavelength) and the blue (short wavelength) regions of the visible light spectrum. Green light is not absorbed but reflected, making the plant appear green. Chlorophyll is found in the chloroplasts of plants.

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    What are the two main wavelengths absorbed by chlorophyll?

    The absorption spectrum of chlorophylls includes wavelengths of blue and orange-red light, as is indicated by their peaks around 450-475 nm and around 650-675 nm.

    Which wavelengths of light are absorbed by chlorophyll check all that apply?

    Chlorophyll, the green pigment common to all photosynthetic cells, absorbs all wavelengths of visible light except green, which it reflects. This is why plants appear green to us. Black pigments absorb all wavelengths of visible light that strike them. White pigments reflect most of the wavelengths striking them.

    Which wavelength S of light is are best absorbed by the chlorophyll in plants quizlet?

    An action spectrum plots the rate of photosynthesis at various wavelengths of visible light, and it shows that blue light with a wavelength of about 490 nm is effective in driving photosynthesis.

    What wavelength of light does chlorophyll b absorb?

    Chlorophyll b molecule has a similar structure to that of chlorophyll a. It absorbs mostly 453nm and 642 nm wavelength light, Although Chlorophyll b is not as abundant as chlorophyll a, it helps the range of light a plant can use for energy.

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