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frutty [35]
3 years ago
15

Securin is a cytoplasmic protein that binds to separase, an enzyme that degrades cohesin. when separase is bound to securin, sep

arase is inactive. when separase is released, it immediately becomes active. securin and separase remain attached to each other as long as securin is phosphorylated. based on the role of securin, it must become dephosphorylated just prior to
Biology
1 answer:
Anika [276]3 years ago
4 0
<span>Cohesin holds the sister chromatids together after DNA replication, and removal of cohesin leads to separation of the sister chromatids. Securin is part of the metaphase-anaphase transition and anaphase onset and is required to ensure that separase is folded properly. Since Securin must be degraded for anaphase and the subsequence degradation of cohesin to occur, it must be dephosphorylated just prior to anaphase.</span>
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Outline three examples of cycles of inorganic nutrients. For each, outline the uses of the nutrients in living organisms, its me
Serggg [28]

The three examples of cycles of inorganic nutrients are Nitrogen, carbon and sulphur cycle.

Nitrogen is required to make amino acids and DNA in organisms. Carbon is the main component of glucose through which organism make energy, about 18 per-cent of the human body comprises carbon. Sulphur is an important constituent of some proteins, amino acids and enzyme cofactors.

Explanation:

The biogeochemical cycles like the nitrogen cycle are responsible for converting nitrogen into many chemical forms as nitrates, nitrites, ammonia. This process involves degrade decomposing animal and plant matter and naturally cleaning the environment also nitrites and nitrates become biofertilizers. The plants take nitrogen through their roots and in turn primary consumer in food chain ie. organisms consume the plant and eventually releases nitrogen as a waste material, dead and decaying body to the soil and cycle goes on.

In the carbon cycle the carbon is exchanged from the atmosphere to the organisms and then again to the environment. Plants perform photosynthesis by using carbon dioxide, primary consumer eats it and gets nutrition to perform cellular respiration, in turn, gets energy which gets dissipated and stored as biomass eventually in the course consumer die and replenish the soil with carbon. The Carbon emitted will keep cycling through air, water and soil.

The sulphur cycle involves the movement of sulphur between rocks, water and living beings and plants. Plants ( producers) absorb sulphur dissolved in water and animal consume these plants to replenish their sulphur requirement. And when organism die, sulphur enter the cycle again.

There will be a transfer of these inorganic nutrients to the trophic level in food chain.

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3 years ago
During transcription, enzymes bind to a molecule of DNA. Then, the enzymes unwind and separate the DNA's double helical strands.
gayaneshka [121]
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4 years ago
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