Photosynthesis Test Review

Term
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Heterotroph
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Terms in this set (20)
Heterotroph
cannot make their own food
Autotroph
makes their own food
Photosynthesis
when an organism takes sun energy and stores it in sugar
Where does all of the energy needed by living things originally come from?
the sun
What molecule provides energy for most cellular processes?
ATP
What is a reactant? Product?
Reactant is the beginning of a chemical reaction, the ingredients, what gets used. Product is the end of the chemical reaction, what is made.
What would happen to the products of a chemical reaction if there were more of the reactants?
If there are more reactants, more products would be made because you have more ingredients.
What would happen to the products of a chemical reaction if there were less of the reactants?
If there are less reactants, less products would be made because you have less ingredients.
What are the reactants and products for photosynthesis?
Reactants: carbon dioxide and water
Products: sugar and oxygen
What else is needed for photosynthesis to happen and why?
Chlorophyll to absorb the light energy.
Sun light as the energy source.
What is the main pigment in plants?chlorophyllWhat type of organism goes through photosynthesis?autotrophsWhat organelle does photosynthesis occur in?chloroplastHow are photosynthesis and cellular respiration similar? (Give 2-3 reasons)energy reactions, exchange gases, both happen in autotrophsHow are photosynthesis and cellular respiration different? (Give 2-3 reasons)Photosynthesis Happens in chloroplast Reactants: Carbon dioxide and water Products: sugar and oxygen Cell Respiration happens in mitochondria Reactants: sugar and oxygen products: carbon dioxide and waterHow do plants use the sugar produced during photosynthesis?for food, to go through cell respiration to make ATP, to grow, to build more plantUsing your knowledge of light, energy, and plants, explain why the following statement is incorrect, "Plants are green and therefore grow best under green light."plants are green because they reflect green light. If they reflect green light, they do not absorb it and would not get any of the green light's energy. Since plants get no energy from green light, they would grow the worst under green light.Explain how we (humans) indirectly use the energy from the sun?Humans are heterotrophs, so we have to eat to get food to get energy. The food we eat got its energy from the sun.If all autotrophs stopped going through photosynthesis, what would happen the cellular respiration?if photosynthesis stopped, then cell respiration would stop too because the oxygen and sugar needed for it to happen would run out.How do pigments work? (What color(s) would they get the most energy from? What color(s) would they get the least energy from? What happens to the colors we see vs the color(s) we don't see?)Pigments are light absorbing molecules. The light they absorb they get energy from because they absorb their energy too. If they do not absorb the light, they reflect it. If they reflect it, they get little to no energy from it. The color we see the pigment from is the color that is reflected; all the other colors are absorbed, so the color we see it as would actually give it the least amount of energy.