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The statements about low temperature stress on plants are listed below.
A. Fatty acid composition of mitochondria isolated from chilling resistant and chilling sensitive plants differs significantly.
B. Ratio of unsaturated fatty acids to saturated fatty acids is lower in chilling resistant species
C. The cellular water does not freeze even at -40 °C because of the presence of solutes and other antifreeze proteins.
D. Heat shock proteins do not play any role during low temperature stress.
Which one of the following combinations of the above statement is correct?
- a)A and B
- b)A and C
- c)B and C
- d)B and D
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
The statements about low temperature stress on plants are listed below...
Concept:
- Plants can avoid freezing stress by surviving it in a dormant state or they can tolerate it by readjusting their metabolism.
- The former category of plants is described as freezing-avoiding, while the latter category is described as freezing-tolerant.
- Freezing-tolerant plants enhance the capacity of their freezing tolerance when they are exposed to gradually decreasing, but above zero, temperatures by a process known as cold acclimation.
- During cold acclimation, plants precisely control their physiology and get prepared for facing sub-zero temperatures by manipulating their gene expression.
- These freezing-tolerant plants are, therefore, good sources of genes and proteins involved in providing tolerance
Explanation:
Statement A:
Fatty acid composition of mitochondria isolated from chilling resistant and chilling sensitive plants differs significantly.- It is generally recognized that mitochondria play a particularly important role in the adaptive response of plants to low temperatures.
- Under these conditions, energy demands of a plant cell are in many ways met by the functional stability of mitochondria
- The process of low-temperature adaptation of plant cells is known to be accompanied by changes in the content of unsaturated fatty acids in bilayer lipids.
- As a result, cell membrane fluidity and permeability are altered.
- The synthesis of unsaturated fatty acids in membranes proceeds with the involvement of membrane-bound desaturases.
- In plant cell, these enzymes are present as acyl-ACP desaturases and acyl-lipid desaturases and are located in plastidic and extra-plastidic plant mem-branes, such as mitochondrial membranes and the endoplasmic reticulum.
- Several research studies back this statement the study of fatty acid composition of the mitochondrial membranes of plant species contrasting in their low-temperature tolerance has yielded significant differences.
- thus this statement is true.
Statement B:
Ratio of unsaturated fatty acids to saturated fatty acids is lower in chilling resistant species.- Chilling-resistant plants contain a large proportion of cis-unsaturated fatty acids at the sn-1 position of PG, and chilling-sensitive plants contain a low level
- thus this statement is not true
Statement C:
The cellular water does not freeze even at -40 °C because of the presence of solutes and other antifreeze proteins.- Overwintering plants secrete antifreeze proteins (AFPs) to provide freezing tolerance.
- These proteins bind to and inhibit the growth of ice crystals that are formed in the apoplast during subzero temperatures.
- Antifreeze activity has been detected in more than 60 plants and AFPs have been purified from 15 of these, including gymnosperms, dicots and monocots.
- thus this statement is not true
Statement D:
Heat shock proteins do not play any role during low temperature stress.- HSPs are also induced by other stresses such as cold, drought, or salinity.
- These HSPs are part of a group of proteins induced by environmental stress either to protect the plant from damage caused by the stress or to help repair the damage caused by the stress.
- There is very likely to be some overlap in function among the different stress proteins.
- thus this statement is not true
hence the correct answer is option 2 statements A and C
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The statements about low temperature stress on plants are listed below. A. Fatty acid composition of mitochondria isolated from chilling resistant and chilling sensitive plants differs significantly. B. Ratio of unsaturated fatty acids to saturated fatty acids is lower in chilling resistant species C. The cellular water does not freeze even at -40 °C because of the presence of solutes and other antifreeze proteins. D. Heat shock proteins do not play any role during low temperature stress. Which one of the following combinations of the above statement is correct?a)A and Bb)A and Cc)B and Cd)B and DCorrect answer is option 'B'. Can you explain this answer?
Question Description
The statements about low temperature stress on plants are listed below. A. Fatty acid composition of mitochondria isolated from chilling resistant and chilling sensitive plants differs significantly. B. Ratio of unsaturated fatty acids to saturated fatty acids is lower in chilling resistant species C. The cellular water does not freeze even at -40 °C because of the presence of solutes and other antifreeze proteins. D. Heat shock proteins do not play any role during low temperature stress. Which one of the following combinations of the above statement is correct?a)A and Bb)A and Cc)B and Cd)B and DCorrect answer is option 'B'. Can you explain this answer? for Software Development 2025 is part of Software Development preparation. The Question and answers have been prepared according to the Software Development exam syllabus. Information about The statements about low temperature stress on plants are listed below. A. Fatty acid composition of mitochondria isolated from chilling resistant and chilling sensitive plants differs significantly. B. Ratio of unsaturated fatty acids to saturated fatty acids is lower in chilling resistant species C. The cellular water does not freeze even at -40 °C because of the presence of solutes and other antifreeze proteins. D. Heat shock proteins do not play any role during low temperature stress. Which one of the following combinations of the above statement is correct?a)A and Bb)A and Cc)B and Cd)B and DCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Software Development 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The statements about low temperature stress on plants are listed below. A. Fatty acid composition of mitochondria isolated from chilling resistant and chilling sensitive plants differs significantly. B. Ratio of unsaturated fatty acids to saturated fatty acids is lower in chilling resistant species C. The cellular water does not freeze even at -40 °C because of the presence of solutes and other antifreeze proteins. D. Heat shock proteins do not play any role during low temperature stress. Which one of the following combinations of the above statement is correct?a)A and Bb)A and Cc)B and Cd)B and DCorrect answer is option 'B'. Can you explain this answer?.
The statements about low temperature stress on plants are listed below. A. Fatty acid composition of mitochondria isolated from chilling resistant and chilling sensitive plants differs significantly. B. Ratio of unsaturated fatty acids to saturated fatty acids is lower in chilling resistant species C. The cellular water does not freeze even at -40 °C because of the presence of solutes and other antifreeze proteins. D. Heat shock proteins do not play any role during low temperature stress. Which one of the following combinations of the above statement is correct?a)A and Bb)A and Cc)B and Cd)B and DCorrect answer is option 'B'. Can you explain this answer? for Software Development 2025 is part of Software Development preparation. The Question and answers have been prepared according to the Software Development exam syllabus. Information about The statements about low temperature stress on plants are listed below. A. Fatty acid composition of mitochondria isolated from chilling resistant and chilling sensitive plants differs significantly. B. Ratio of unsaturated fatty acids to saturated fatty acids is lower in chilling resistant species C. The cellular water does not freeze even at -40 °C because of the presence of solutes and other antifreeze proteins. D. Heat shock proteins do not play any role during low temperature stress. Which one of the following combinations of the above statement is correct?a)A and Bb)A and Cc)B and Cd)B and DCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Software Development 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The statements about low temperature stress on plants are listed below. A. Fatty acid composition of mitochondria isolated from chilling resistant and chilling sensitive plants differs significantly. B. Ratio of unsaturated fatty acids to saturated fatty acids is lower in chilling resistant species C. The cellular water does not freeze even at -40 °C because of the presence of solutes and other antifreeze proteins. D. Heat shock proteins do not play any role during low temperature stress. Which one of the following combinations of the above statement is correct?a)A and Bb)A and Cc)B and Cd)B and DCorrect answer is option 'B'. Can you explain this answer?.
Solutions for The statements about low temperature stress on plants are listed below. A. Fatty acid composition of mitochondria isolated from chilling resistant and chilling sensitive plants differs significantly. B. Ratio of unsaturated fatty acids to saturated fatty acids is lower in chilling resistant species C. The cellular water does not freeze even at -40 °C because of the presence of solutes and other antifreeze proteins. D. Heat shock proteins do not play any role during low temperature stress. Which one of the following combinations of the above statement is correct?a)A and Bb)A and Cc)B and Cd)B and DCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Software Development.
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ample number of questions to practice The statements about low temperature stress on plants are listed below. A. Fatty acid composition of mitochondria isolated from chilling resistant and chilling sensitive plants differs significantly. B. Ratio of unsaturated fatty acids to saturated fatty acids is lower in chilling resistant species C. The cellular water does not freeze even at -40 °C because of the presence of solutes and other antifreeze proteins. D. Heat shock proteins do not play any role during low temperature stress. Which one of the following combinations of the above statement is correct?a)A and Bb)A and Cc)B and Cd)B and DCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Software Development tests.
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