#Question id: 9593
#Unit 6. System Physiology – Plant
The lower-energy orbital of the positively charged oxidized reaction centre chlorophyll has a vacancy and can accept an electron If the acceptor molecule donates its electron back to the reaction centre chlorophyll, What will happened?
#Question id: 5808
#Unit 8. Inheritance Biology
Mitochondrial DNA polymerase does not have an error checking mechanism such as that of nuclear DNA polymerase. This would be expected to lead to a higher rate of which type of mutation in mitochondrial DNA?
#Question id: 28885
#Unit 4. Cell Communication and Cell Signaling
Which of the following protein uses as a second TM protein in canonical Wnt signaling?
#Question id: 12718
#Unit 6. System Physiology – Plant
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COLUMN I
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COLUMN II |
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A) Physical sensing
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i) usually results from the
detection of by-products that accumulate in cells due to the uncoupling of
enzymatic or electron transfer reactions, such as the accumulation of ROS
during stress caused by too much light.
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B) Biophysical sensing
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ii) often involves the presence of
specialized proteins that have evolved to sense a particular stress; for
example, calcium channels that can sense changes in temperature and alter
Ca2+ homeostasis.
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C) Metabolic sensing
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iii) refers to modifications of
DNA or RNA structure that do not alter genetic sequences, such as the changes
in chromatin that occur during temperature stress.
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D) Biochemical sensing
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iv) refers to the mechanical
effects of stress on the plant or cell structure, for example, the
contraction of the plasma membrane from the cell wall during drought stress.
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E) Epigenetic sensing
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v) might involve changes in
protein structure or enzymatic activity, such as the inhibition of different
enzymes during heat stress.
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#Question id: 10520
#Unit 6. System Physiology – Plant
Which one of the following fungus causes infected rice shoots to grow much faster relative to uninfected plants and responsible for the “foolish seedling disease” of rice?