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| 1 | |
Which of the following is a biological stimulus that would elicit a response from a plant? |
| | A) | Pathogens |
| | B) | Soil microorganisms |
| | C) | Herbivores |
| | D) | Hormones |
| | E) | All of the choices are biological stimuli of plants |
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| 2 | |
Which of the following is not an important plant hormone? |
| | A) | Auxins |
| | B) | Brassinosteroids |
| | C) | Ethylene |
| | D) | Cytokinins |
| | E) | CDPKs |
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| 3 | |
Which of the following is a red and far-red light receptor molecule? |
| | A) | Phototropin |
| | B) | Phytochrome |
| | C) | Cryptochrome |
| | D) | Phytochrome and cryptochrome |
| | E) | Phototropin, phytochrome, and cryptochrome |
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| 4 | |
Which of the following statements about phototropism is incorrect? Phototropism: |
| | A) | involves growth of stem tissue. |
| | B) | is based on a cellular perception of light. |
| | C) | is a response to a pathogen. |
| | D) | results in a change in location of auxin. |
| | E) | All of the above statements about phototropism are correct. |
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| 5 | |
Molecules that directly influence cellular responses are most accurately referred to as _____________, while _______________ are proteins that become activates when they receive specific signals. |
| | A) | effectors; messengers |
| | B) | receptors; messengers |
| | C) | receptors; effectors |
| | D) | messengers; receptors |
| | E) | effectors; receptors |
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| 6 | |
True or False: The "master" plant hormones that influence structure, development and behavior in various ways are most accurately referred to as auxins. |
| | A) | True |
| | B) | False |
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| 7 | |
The primary role of cytokinins is |
| | A) | root development. |
| | B) | inducing fruit trees to drop their fruits. |
| | C) | plant cell elongation. |
| | D) | plant cell division. |
| | E) | stem senescence. |
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| 8 | |
DELLA proteins function to _______________________ and are indirectly degraded by _____________________ . |
| | A) | prevent cell elongation : brassinosteroids |
| | B) | promote cell division : auxins |
| | C) | prevent cell elongation : abscisic acid |
| | D) | promote cell division : cytokinins |
| | E) | prevent cell division : gibberellins |
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| 9 | |
Ethylene gas was found to cause pea seedlings to grow sideways instead of up due to cell elongation. Which of the following is most likely utilized by plants in association with ethylene to produce this result? |
| | A) | Gibberellins |
| | B) | Auxins |
| | C) | Cytokinins |
| | D) | Gibberellins and auxins |
| | E) | Auxins and cytokinins |
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| 10 | |
Which of the following is not primarily a protective hormone? |
| | A) | Abscisic acid |
| | B) | Salicylic acid |
| | C) | Ethlyene |
| | D) | Nitric oxide |
| | E) | Jasmonic acid |
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| 11 | |
True or False: Animal steroid hormone receptors are typically found at the nucleus, while brassinosteroid receptors are found at the plasma membrane. |
| | A) | True |
| | B) | False |
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| 12 | |
A plant's ability to measure and respond to light amounts and day length is most accurately referred to as |
| | A) | photoperiodism. |
| | B) | phototropism. |
| | C) | gravitropism. |
| | D) | phototaxis. |
| | E) | thigmotropism. |
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| 13 | |
Which one of the following statements about plant growth is incorrect? |
| | A) | Relatively heavy plastids in roots and shoots that detect gravity are referred to as statoliths. |
| | B) | Roots, which are drawn down by gravity, are said to be negatively gravitopic. |
| | C) | Over time, a shoot that has been placed so that it is growing horizontally will return to growing vertically. |
| | D) | Touch responses can be induced by the wind. |
| | E) | All of the statements about plant growth are correct. |
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| 14 | |
True or False: Rapid responses to touch are based on changes in the water content of cells within structures most accurately referred to as pulvinis. |
| | A) | True |
| | B) | False |
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| 15 | |
True or False: Aerenchyma are only produced in response to flood conditions in order for roots to receive oxygen needed for ATP production. |
| | A) | True |
| | B) | False |
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| 16 | |
What is the maximum amount of a plant's water content that can typically be lost before the plant cannot recover? |
| | A) | 5% |
| | B) | 10% |
| | C) | 50% |
| | D) | 90% |
| | E) | None; if a plant loses any water, it cannot typically recover. |
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| 17 | |
Which of the following is/are way/s in which plants protect themselves from water loss during drought? |
| | A) | Regulation of aquaporins |
| | B) | Closing stomata |
| | C) | Use aerenchyma to move water from storage in roots to stems and leaves. |
| | D) | Regulation of aquaporins and closing stomata |
| | E) | Regulation of aquaporins and use aerenchyma to move water from storage in roots to stems and leaves |
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| 18 | |
Which of the following statements about plant defenses is incorrect? |
| | A) | Incoming viral nucleic acid can be degraded by plant enzymes. |
| | B) | Some plant-derived substances make plants taste so bad that herbivores learn to avoid them. |
| | C) | Herbivore attack can be lessened by structural barriers such as trichomes and bark. |
| | D) | Some plants release compounds that attract enemies of their attackers. |
| | E) | All of the statements about plant defenses are correct. |
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| 19 | |
Most plant resistance genes encode |
| | A) | digestive enzymes that degrade pathogen elicitors. |
| | B) | hormones that are part of the hypersensitive response. |
| | C) | proteins that function as elicitor receptors. |
| | D) | structural proteins that block haustoria. |
| | E) | transcription factors localized to the nucleus, leading to a response. |
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| 20 | |
True or False: Hypersensitive response (HR) in plants occurs in response to elicitors released by pathogens and is capable of inducing systemic acquired resistance(SAR). |
| | A) | True |
| | B) | False |
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