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1 | | Most solar radiation passes through the earth's atmosphere and reaches its surface. |
| | A) | True |
| | B) | False |
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2 | | Photosynthesis utilizes _____. |
| | A) | the entire electromagnetic spectrum |
| | B) | only visible light |
| | C) | radio and microwaves |
| | D) | gamma rays |
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3 | | Which of the following is only minimally absorbed by chlorophylls a and b? |
| | A) | violet light |
| | B) | green light |
| | C) | blue light |
| | D) | red light |
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4 | | Photosynthetic pigments capture _____ of the solar energy that reaches the earth. |
| | A) | less than 2% |
| | B) | 20% |
| | C) | 50% |
| | D) | 100% |
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5 | | The importance of photosynthesis is that photosynthetic organisms produce ____ for the biosphere. |
| | A) | CO2 |
| | B) | H2O |
| | C) | organic food |
| | D) | all of the above |
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6 | | Which of the following do NOT perform photosynthesis? |
| | A) | plants |
| | B) | animals |
| | C) | algae |
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7 | | The piece of equipment that measures how much light passes through a sample is called a _____. |
| | A) | spirometer |
| | B) | gas chromatograph |
| | C) | spectrophotometer |
| | D) | calorimeter |
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8 | | The rate of photosynthesis can be measured by measuring the production of _____. |
| | A) | CO2 |
| | B) | H2O |
| | C) | O2 |
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9 | | The pigments which are primarily responsible for the metabolic activity associated with photosynthesis are the _____. |
| | A) | chlorophylls |
| | B) | carotenoids |
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10 | | The plant pigments, carotenoids, absorb light in the violet-blue-green range and therefore appear shades of yellow and orange. |
| | A) | True |
| | B) | False |
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11 | | The reactants of photosynthesis include all of the following except _____. |
| | A) | solar energy |
| | B) | carbohydrates |
| | C) | H2O |
| | D) | CO2 |
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12 | | Photosynthesis is an energy transformation during which all of the available solar radiation is transformed into chemical bond energy of carbohydrates. |
| | A) | True |
| | B) | False |
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13 | | The oxygen given off by photosynthesis comes from ___________. |
| | A) | CO2 |
| | B) | CH2O |
| | C) | H2O |
| | D) | the atmosphere |
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14 | | In a eukaryotic cell, photosynthesis occurs in the _____. |
| | A) | chloroplast |
| | B) | mitochondria |
| | C) | nucleus |
| | D) | golgi complex |
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15 | | The photosynthetic pigments are found in the _____. |
| | A) | stroma |
| | B) | SER |
| | C) | Golgi complex |
| | D) | thylakoids |
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16 | | CO2 reduction occurs in the _____. |
| | A) | thylakoids |
| | B) | stroma |
| | C) | nucleus |
| | D) | grana |
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17 | | During photosynthesis CO2 is _____ to form carbohydrates. |
| | A) | oxidized |
| | B) | reduced |
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18 | | Chloroplasts will be found in _____. plant leaf cells |
| | A) | photosynthetic bacteria |
| | B) | animal cells |
| | C) | all of the above |
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19 | | In some places, thylakoids are stacked to form what look like piles of seeds called grana. |
| | A) | True |
| | B) | False |
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20 | | Heavy oxygen (18O) was used to show that O2 produced by photosynthesis comes from H2O. |
| | A) | True |
| | B) | False |
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21 | | The light-independent reactions of photosynthesis must take place in the dark. |
| | A) | True |
| | B) | False |
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22 | | The rate of photosynthesis is not affected by changes in temperature. |
| | A) | True |
| | B) | False |
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23 | | The energy-capturing reactions take place during the _____ reactions. |
| | A) | light-dependent |
| | B) | light-independent |
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24 | | When NADP+ accepts electrons it becomes _____. |
| | A) | CO2 |
| | B) | (CH2O) |
| | C) | NADPH |
| | D) | H2O |
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25 | | The light-independent reactions take place in the ___________. |
| | A) | thylakoids |
| | B) | grana |
| | C) | mitochondria |
| | D) | stroma |
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26 | | When the thylakoid pigments absorb solar energy, low energy electrons are removed from _____. |
| | A) | (CH2O) |
| | B) | H2O |
| | C) | CO2 |
| | D) | all of the above |
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27 | | Chlorophyll a and chlorophyll b absorb exactly the same range of light and appear the same color. |
| | A) | True |
| | B) | False |
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28 | | Light can be _____ by a pigment. |
| | A) | absorbed by (taken up) |
| | B) | reflected by (given off) |
| | C) | transmitted (passed through) |
| | D) | all of the above |
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29 | | The light dependent reactions cannot take place without light. |
| | A) | True |
| | B) | False |
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30 | | When electrons from chlorophyll a move down an electron transport system _____ is produced. |
| | A) | NADP+ |
| | B) | H2O |
| | C) | ATP |
| | D) | carbohydrate |
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31 | | ATP production during photosynthesis is sometimes called photophosphorylation because light is involved. |
| | A) | True |
| | B) | False |
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32 | | Which of the following is true of the cyclic electron pathway? |
| | A) | ATP and NADPH are both produced. |
| | B) | this pathway probably evolved after the non-cyclic electron pathway. |
| | C) | the solar energy is absorbed by the PS I antenna complex. |
| | D) | all of the above |
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33 | | Which of the following is a product of the noncyclic electron pathway? |
| | A) | ATP |
| | B) | O2 |
| | C) | NADPH |
| | D) | all of the above |
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34 | | During the noncyclic electron pathway, electrons move from water through PS II to PS I and then to _____. |
| | A) | ADP |
| | B) | CO2 |
| | C) | NADP+ |
| | D) | glucose |
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35 | | Which of the following is NOT a product of the light-dependent reactions? |
| | A) | ATP |
| | B) | O2 |
| | C) | glucose |
| | D) | NADPH |
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36 | | When H+ flow down their electrochemical gradient through _____ ATP production occurs. |
| | A) | PS I |
| | B) | PS II |
| | C) | ATP synthase |
| | D) | the stroma |
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37 | | The light-dependent reactions take place in the _____. |
| | A) | stroma |
| | B) | thylakoids |
| | C) | cytosol |
| | D) | cristae |
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38 | | During the light-dependent reactions, H2O is _____. |
| | A) | oxidized |
| | B) | reduced |
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39 | | When ATP synthesis is tied to an electrochemical gradient it is called chemiosmosis. |
| | A) | True |
| | B) | False |
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40 | | The antennae complex is composed of _____. |
| | A) | chlorophyll a |
| | B) | chlorophyll b |
| | C) | carotenoid pigments |
| | D) | all of the above |
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41 | | Which product of the light-dependent reactions is used in the light-independent reactions? |
| | A) | O2 |
| | B) | NADPH |
| | C) | ATP |
| | D) | both B and C |
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42 | | The energy and electrons needed for the reduction synthesis are supplied by _____. |
| | A) | NADPH |
| | B) | ATP |
| | C) | CO2 |
| | D) | both A and B |
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43 | | A plant can use PGAL to make _____. |
| | A) | sucrose |
| | B) | oils |
| | C) | cellulose |
| | D) | all of the above |
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44 | | Compared to animal cells, plant and algal cells have more limited biochemical capabilities. |
| | A) | True |
| | B) | False |
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45 | | The first step of the Calvin cycle is |
| | A) | CO2 fixation |
| | B) | PGAL reduction |
| | C) | RuBP regeneration |
| | D) | ATP synthesis |
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46 | | The Calvin cycle is sometimes referred to as the C3 cycle because the first detectable moleculefollowing CO2 fixation is a 3-carbon molecule. |
| | A) | True |
| | B) | False |
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47 | | CO2 fixation occurs when CO2 combines with _____. |
| | A) | ribulose bisphosphate |
| | B) | gylceraldehyde -3-phosphate |
| | C) | NADP |
| | D) | glucose |
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48 | | About 20-50% of the protein content in chloroplasts is _____ which speeds up CO2 fixation. |
| | A) | glyceraldehyde-3-phosphate |
| | B) | NADPH |
| | C) | ATP |
| | D) | RuBP carboxylase |
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49 | | Which correctly describes the light independent reactions? |
| | A) | ATP is produced |
| | B) | CO2 is reduced |
| | C) | sunlight is required |
| | D) | O2 is produced |
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50 | | Five molecules of PGAL are used to produce _____ so that the Calvin cycle can continue. |
| | A) | NADPH |
| | B) | RuBP |
| | C) | glucose |
| | D) | oxaloacetate |
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51 | | The six-carbon molecule resulting from carbon-dioxide fixation immediately breaks down to form __________. |
| | A) | 2, three-carbon PGA molecules |
| | B) | 3, two-carbon PGA molecules |
| | C) | glucose |
| | D) | RuBP |
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52 | | In a C4 plant, the __________ cells contain chloroplasts. |
| | A) | bundle sheath |
| | B) | mesophyll |
| | C) | both A and B |
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53 | | C4 plants fix CO2 to _____. |
| | A) | PEP |
| | B) | RuBP |
| | C) | PGA |
| | D) | oxaloacetate |
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54 | | The stomates of the leaves _____. |
| | A) | close when the weather is hot and dry |
| | B) | take up CO2 |
| | C) | allow H2O to leave the leaf |
| | D) | all of the above |
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55 | | The CAM light-independent reactions occur only at night so H2O can be conserved. |
| | A) | True |
| | B) | False |
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56 | | A solution to global warming is _____. |
| | A) | plant more shrubs and trees |
| | B) | use fewer fossil fuels |
| | C) | protect the rainforests |
| | D) | all of the above |
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57 | | C4 plants like corn and crabgrass grow better when conditions are hot and dry. |
| | A) | True |
| | B) | False |
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