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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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