1	Photosynthesis Practice Quiz Questions
2	Which of these types of organisms produce the biosphere’s food supply? Producers Consumers Heterotrophs Consumers and heterotrophs Producers and heterotrophs
3	In a rosebush, chlorophyll is located in _____. Chloroplasts, which are in mesophyll cells in the thylakoid's of a leaf Mesophyll cells, which are in the thylakoids in chloroplasts in a leaf Thylakoids, which are in mesophyll cells in the chloroplasts in a leaf Chloroplasts, which are in thylakoids in the mesophyll cells of a leaf Thylakoids, which are in chloroplasts in the mesophyll cells of a leaf
4	Cellular respiration and photosynthesis are similar in that both involve _____. the production of sugars redox reactions the release O₂ into the atmosphere they release CO₂ into the atmosphere water splitting
5	The photosynthetic event known as the Calvin cycle occurs in the _____. Thylakoid membrane Thylakoid compartment Stroma Stomata Matrix
6	The "photo-" part of the word "photosynthesis" refers to _________, whereas "-synthesis" refers to __________. The light reactions that occur in the thylakoid … carbon fixation The reactions in the stomata … the reactions in the thylakoid The Calvin Cycle … carbon fixation The Calvin Cycle … the reactions in the stroma The light reactions … reactions in the thylakoid
7	The wavelengths of light absorbed by pigments in the granum are mainly in which range? green, which is why plants are green Blue-violet and red-orange The entire spectrum of white light The infrared The range absorbed by carotenoids
8	The most important role of pigments in photosynthesis is to _____. Capture light energy Screen out harmful ultraviolet rays Store energy in glucose molecules Release energy from glucose molecules Store energy in ATP
9	Which one of the following colors is most strongly transmitted by chlorophyll? Red Orange Yellow Green Blue
10	Which of these wavelengths is LEAST useful for photosynthesis? Green Yellow Blue Orange Red
11	When chloroplast pigments absorb light, _____. They become reduced They lose potential energy Their electrons become excited The Calvin Cycle is triggered Their photons become excited
12	The reaction center, antenna molecules, and primary electron acceptors that cluster in the thylakoid membrane form which structure? Fluorescence center Photosystem Electron transport chain Carbon-fixation unit Electromagnetic spectrum
13	The synthesis of glucose by photosynthesis is an endergonic process. The source of the energy for the excited electrons is _____. Chlorophyll Carbon dioxide Water Glucose Light
14	The light reactions of photosynthesis generate high-energy electrons, which end up in ____. The light reactions also produce ____ and ____. ATP ... NADPH ... oxygen Oxygen ... sugar ... ATP Chlorophyll ... ATP ... NADPH Water ... sugar ... oxygen NADPH ... ATP ... oxygen
15	Where do the electrons needed by photosystem II originate? Other chlorophyll molecules ATP The electron transport chain Light Water
16	During photosynthesis in chloroplasts, O₂ is produced from __________ via a series of reactions associated with __________. CO₂…photosystem II H₂O…photosystem II CO₂…Calvin cycle H₂O…photosystem I CO₂…both photosystem I and the Calvin cycle
17	Light reactions do all of the following EXCEPT _____. Convert sunlight into chemical energy Synthesize ATP and NADPH Reduce CO₂ Convey excited electrons from chlorophyll to an electron acceptor Absorb photons
18	During photosynthesis, an electron transport chain is used to _____. Transport NADPH from the light reactions to the Calvin cycle Transport excited electrons from P700 to an electron acceptor Transport excited electrons from P680 to an electron acceptor Transport electrons from photosystem II to photosystem I Transport excited electrons from P700 to an electron acceptor and transport excited electrons from P680 to an electron acceptor
19	Molecular oxygen is produced during _____. Glycolysis Light reactions of photsynthesis The Calvin cycle Aerobic respiration Electron transport chain
20	Light reactions are well located in the thylakoid membrane because _____. The membrane brings chlorophyll closer to the light The enzymes involved require a lipid bound to their active site Chemiosmosis can be set up across the thylakoid membrane The membrane functions as a mitochondrial membrane at night The membrane binds oxygen
21	Both mitochondria and chloroplasts _____. Use a H⁺ gradient to produce ATP Obtain electrons from water Reduce NAD⁺, forming NADP Release oxygen as a by-product Are surrounded by a single membrane
22	In addition to its function during electron transport in mitochondria, the chemiosmotic mechanism is important for generating ATP during the _____. Fermentation of glucose Process of intracellular digestion within lysosomes Light reactions of photsynthesis Process of DNA replication Synaptic transmisson
23	During photosynthesis in a eukaryotic cell, a high H⁺ concentration accumulates or is formed in the ___________. Thylakoid membrane Thylokoid compartment Stroma Stomata Matrix
24	Which group does not contain any photoautotrophs? Bacteria of the open ocean Algae that grows in “forests” off of coastlines Corn stalks just before harvest Deep sea vent organisms that make organic molecules using hydrogen sulfide as an energy source
25	What is the "greenest" part of a chloroplast? the outer membrane the stroma the thylakoid membranes the thylakoid space
26	The statement "during photosynthesis, CO₂ is reduced to sugar" seems strange if we use the common meaning of the word "reduced." After all, sugars are larger, not smaller than CO₂. What is the scientific sense of "CO₂ is reduced to sugar"? Electrons (with accompanying protons) are added to CO₂ during photosynthesis. Electrons (with accompanying protons) are removed from CO₂ during photosynthesis and added to water molecules to form sugar. Hydrogen is added to CO₂during photosynthesis. Oxygen is removed from CO2 during photosynthesis.
27	NADP⁺ cannot be converted to NADPH without _____. Water Light ATP Water and Light
28	Chlorophyll can be found in _____. B and D A and B A and C B and C B and E
29	Where does the Calvin cycle occur? A B C D E
30	Identify a thylakoid. A B C D E
31	Identify C Calvin Cycle Light Reactions Electron Transport Photorespirat-ion
32	What is the chemical formula for Photosynthesis? 6CO₂ + 6H₂O à C₆H₁₂O₆ + 6O₂ C₆H₁₂O₆ + 6O₂à 6CO₂ + 6H₂O C₆H₁₂O₆+ 6CO₂à 6H₂O + 6O₂ 6H₂O + 6O₂à C₆H₁₂O₆ + 6CO₂