Quiz
Photosynthesis
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Perguntas do quiz (25)
1In photosynthesis, plants use carbon from _____ to make sugar and other organic molecules.
- Awater
- Bthe sun
- Cchlorophyll
- Dsoil
- Ecarbon dioxide
2A photon of which of these colors would carry the most energy?
- Aorange
- Bgreen
- Cyellow
- Dblue
- Ered
3Both mitochondria and chloroplasts _____.
- Aobtain electrons from water
- Breduce NAD+, forming NADP
- Cuse chemiosmosis to produce ATP
- Drelease oxygen as a by-product
- Eare surrounded by a single membrane
4Chlorophyll molecules are in which part of the chloroplast?
- Astroma
- Bthylakoid membranes
- Cstomata
- Dplasma membrane
- Ethylakoid lumen
5During photosynthesis in a eukaryotic cell, an electrochemical gradient is formed across the ______.
- Achloroplast inner membrane
- Bstomata
- Ccristae
- Dchloroplast outer membrane
- Ethylakoid membrane
6During photosynthesis in chloroplasts, O2 is produced from _____ via a series of reactions associated with _____.
- ACO2 ... photosystem II
- BCO2 ... the Calvin cycle
- CH2O ... photosystem I
- DH2O ... photosystem II
- ECO2 ... both photosystem I and the Calvin cycle
7During photosynthesis, an electron transport chain is used to _____.
- Atransport excited electrons from P700 to an electron acceptor
- Btransport electrons from photosystem II to photosystem I
- Ctransport excited electrons from P680 to an electron acceptor
- Dtransport NADPH from the light reactions to the Calvin cycle
- Etransport excited electrons from P700 to an electron acceptor and transport excited electrons from P680 to an electron acceptor
8Glyceraldehyde-3-phosphate (G3P) is produced in the stroma of chloroplasts. Which of the following statements is most true about this compound?
- AFor every three molecules of CO2, six molecules of G3P are formed but only one molecule exits the cycle to be used by the plant cell.
- BFor every three molecules of CO2, six molecules of G3P are formed but five molecules must be recycled to regenerate three molecules of RuBP
- CIt is produced from glucose during glycolysis.
- DIt is a 3-carbon sugar.
- EAll of the listed responses are correct.
9How does carbon dioxide enter the leaf?
- Athrough the roots
- Bthrough the chloroplasts
- Cthrough the stomata
- Dthrough the thylakoids
- Ethrough the vascular system
10In a rosebush, chlorophyll is located in _____.
- Achloroplasts, which are in thylakoids in the mesophyll cells of a leaf
- Bmesophyll cells, found within the thylakoids of a leaf's chloroplasts
- Cthylakoids, which are in mesophyll cells in the chloroplasts of a leaf
- Dthylakoids, which are in chloroplasts in the mesophyll cells of a leaf
- Echloroplasts, which are in mesophyll cells in the thylakoids of a leaf
11In photosynthesis, what is the fate of the oxygen atoms present in CO2? They end up _____.
- Ain sugar molecules and in water
- Bas molecular oxygen
- Cas molecular oxygen and in sugar molecules
- Din sugar molecules
- Ein water
12In the Calvin cycle, CO2 is combined with _____.
- Atwo 2-carbon compounds to form a 5-carbon compound
- Ba 5-carbon compound to form a stable 6-carbon compound that can be converted directly to glucose
- Ca 7-carbon compound to form two 4-carbon compounds
- Da 2-carbon compound to form a 3-carbon compound
- Ea 5-carbon compound to form an unstable 6-carbon compound, which decomposes into two 3-carbon compounds
13Molecular oxygen is produced during _____.
- Acyclic electron flow during the light reactions
- Bglycolysis
- Cre-energization of electrons by PSI
- Dnoncyclic electron flow during the light reactions
- Ethe Calvin cycle
14Of the following, which occurs during the Calvin cycle?
- AExcited electrons are conveyed from chlorophyll to an electron acceptor.
- BLight energy is converted to chemical energy.
- CATP and NADPH are synthesized.
- DCO2 is reduced.
- EPhotons are absorbed.
15Of the following, which occurs during the Calvin cycle?
- ANoncyclic electron flow produces the materials required for the fixation of carbon from carbon dioxide.
- BATP is reduced and NADPH is oxidized.
- CLight energy is converted to chemical energy.
- DATP is hydrolyzed and NADPH is oxidized.
- EATP is oxidized and NADPH is reduced.
16Rubisco is _____.
- Athe first stable intermediate in C4 photosynthesis
- Bthe enzyme responsible for splitting H2O to produce O2 in photosynthesis
- Cthe enzyme in plants that first captures CO2 to begin the Calvin cycle
- Dthe 5-carbon sugar molecule that reacts with CO2 to begin the Calvin cycle
- Ethe enzyme that forms a 4-carbon compound in CAM photosynthesis
17The Calvin cycle occurs in the _____.
- Amatrix
- Bthylakoid lumen
- Cstomata
- Dstroma
- Ethylakoid membrane
18The energy used to produce ATP in the light reactions of photosynthesis comes from _____.
- Athe oxidation of sugar molecules
- Bsplitting water
- Cmovement of H+ through a membrane
- Dfluorescence
- Ecarbon fixation
19The light reactions of photosynthesis generate high-energy electrons, which end up in _____. The light reactions also produce _____ and _____.
- ANADPH ... ATP ... oxygen
- Bchlorophyll ... ATP ... NADPH
- CATP ... NADPH ... oxygen
- Dwater ... sugar ... oxygen
- Eoxygen ... sugar ... ATP
20The most important role of pigments in photosynthesis is to _____.
- Acatalyze the hydrolysis of water
- Bstore energy
- Ccapture light energy
- Dscreen out harmful ultraviolet rays
- Ecatalyze the synthesis of ATP
21The reactions of the Calvin cycle are not directly dependent on light, but they usually do not occur at night. Why?
- ACarbon dioxide concentrations decrease at night.
- BAt night, no water is available for the Calvin cycle.
- CIt is often too cold at night for these reactions to take place.
- DThe Calvin cycle requires products only produced when the photosystems are illuminated.
- EPlants usually open their stomata at night.
22The source of the oxygen produced by photosynthesis has been identified through experiments using radioactive tracers. The oxygen comes from _____.
- Aradioisotopes
- Bglucose
- Clight
- Dcarbon dioxide
- Ewater
23The use of non-C3 and non-CAM plants as crops may be limited in some regions because on hot, dry days, they close their stomata. What happens as a result of closing their stomata?
- AIn a process called photorespiration, rubisco binds oxygen instead of carbon dioxide.
- BIt reduces water loss.
- CIt builds up oxygen from the light reactions in the leaf.
- DIt prevents carbon dioxide from entering the leaf.
- EAll of the listed responses are correct.
24What is the range of wavelengths of light that are absorbed by the pigments in the thylakoid membranes?
- Athe entire spectrum of white light
- Bgreen, which is why plants are green
- Cthe range absorbed by carotenoids
- Dthe infrared
- Eblue-violet and red-orange
25What is the role of NADP+ in photosynthesis?
- AIt is reduced and then carries electrons to the Calvin cycle.
- BIt assists chlorophyll in capturing light.
- CIt acts as the primary electron acceptor for the photosystems.
- DAs a component of photosystem II, it catalyzes the hydrolysis of water.
- EAs part of the electron transport chain, it manufactures ATP.
Informações
- Descrição
- Biology Quiz sobre Photosynthesis, criado por Maxwell Morgan em 14-12-2017.
- Autor
- Maxwell Morgan
- Idioma
- English
- Visualizações
- 4
- Etiquetas
- Avaliação
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