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Chapter 8 Biology Flashcards

Photsynthesis

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1903129453Autotrophorganisms which make their own food0
1903129454Granastacks of thylakoids1
1903129455Thylakoidsaclike photosynthetic membranes2
1903129456Chlorophyllplants' principle pigment3
1903129457Pigmentlight-absorbing molecules4
1903129458Photosynthesisplants use the energy of sunlight to convert water and carbon dioxide into high-energy carbohydrates - sugars and starches - and oxygen, a waste product5
1903129459Adenosine triphosphateone of the principle chemical compounds that cells use to store and release energy6
1903129460Heterotrophorganisms which obtain energy from the food that they consume7
1903129461Photosystemchlorophyll and other pigments are organized into complexes8
1903129462Light - dependent reactionsrequires light9
1903129463ATP synthasespans the membrane and allows H+ ions to pass through it and produces ATP10
1903129464Calvin cycleplants use the energy that ATP and NADPH contain to build high-energy compounds that can be stored for a long time11
1903129465Stromathe region outside the thylakoid membranes12
1903129466NADP+an electron carrier13
1903129467What do autotrophs require from the environment in order to synthesize sugar?Light Carbon dioxide Water (and soil minerals)14
1903129468Organisms that make their own food are calledautotrophs15
1903129469Most autotrophs obtain their energy from:sunlight16
1903129470How is energy released from ATP?A phosphate is removed.17
1903129471How is it possible for most cells to function with only a small amount of ATP?ATP can be quickly regenerated from ADP and P.18
1903129472Compared to the energy stored in a molecule of glucose, ATP storesmuch less energy.19
1903129473What is the ultimate source of energy for plants?The Sun20
1903129474What is ATP and what is its role in the cellATP stands for adenosine triphosphate, which is one of the principle chemical compounds that living things use to store energy and release it for cell work to be done.21
1903129475Describe several cellular activities that uses the energy released by ATP.Active transport, movements within the cell, synthesis of proteins and nucleic acids, or responses to chemical signals.22
1903129476How do autotrophs obtain energy?Autotrophs obtain energy by making their own food23
1903129477How do heterotrophs obtain energy?Heterotrophs obtain energy from the foods they consume24
1903129478With respect to energy, how are ATP and glucose similar?Both store energy for a cell25
1903129479With respect to energy, how are ATP and glucose different?A single molecule of glucose stores more than 90 times the chemical energy of an ATP molecule.26
1903129480In van Helmont's experiment, most of the added mass of the tree came fromwater and carbon dioxide.27
1903129481Plants use the sugars produced in photosynthesis to makestartches28
1903129482The raw materials required for plants to carry out photosynthesis arecarbon dioxide and water.29
1903129483The principal pigment in plants ischlorophyll30
1903129484The colors of light that are absorbed by chlorophylls areblue, violet, and red31
1903129485What did van Helmont discover about plants?water is involved in increasing the mass of the plant32
1903129486What did Priestly (first bell jar experiment) discover about plants?a plant produces the substance in air required for burning33
1903129487What did Ingenhousz (second bell jar experiment) discover about plants?light is necessary for plants to produce oxygen34
1903129488Describe the process of photosynthesis, including the reactants and products.Photosynthesis uses the energy of sunlight to convert water and carbon dioxide into oxygen and high-energy sugars35
1903129489Why are light and chlorophyll needed for photosynthesis?Light provides the energy to produce high-energy sugars Chlorophyll absorbs light, and the energy of that absorbed light makes photosynthesis work36
1903129490Describe the relationship between chlorophyll and the color of plants.Plants are green because green light is reflected by the chlorophyll in the leaves.37
1903129491How well would a plant grow under pure yellow light? Explain your answer.The plant would not grow well because chlorophyll does not absorb much light in the yellow region of visible light.38
1903129492In plants, photosynthesis takes place inside thechloroplasts39
1903129493Energy to make ATP in the chloroplast comes most directly from:hydrogen ions flowing through an enzyme in the thylakoid membrane.40
1903129494NADPH is produced in light-dependent reactions and carries energy in the form of:high-energy electrons41
1903129495What is another name for the Calvin cycle?light-independent reactions42
1903129496Summarize the light-dependent reactions.The light-dependent reactions produce oxygen gas and convert ADP and NADP+ into the electron carriers ATP and NADPH.43
1903129497What reactions make up the Calvin cycle?The Calvin cycle uses ATP and NADPH from the light-dependent reaction to produce high-energy sugars.44
1903129498How is light energy converted into chemical energy during photosynthesis?Light energy is converted into chemical energy by the pigments in the chloroplast.45
1903129499What is the function of NADPH?The main function of NADPH is to carry high-energy electrons produced by light absorption in chlorophyll to chemical reactions elsewhere in the cell.46
1903129500Why are the light-dependent reactions important to the Calvin cycle?The light-dependent reactions provide the Calvin cycle with ATP and NADPH. The Calvin cycle uses the energy in ATP and NADPH to produce high-energy sugars.47

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