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Shalnov [3]
3 years ago
12

Why is it important that cells contain catalase?

Biology
1 answer:
Triss [41]3 years ago
7 0
<span>Catalase catalyzes the decomposition of hydrogen peroxide to water and oxygen. It is a very </span>important<span> enzyme in protecting the </span>cell<span> from oxidative damage by reactive oxygen species. Hope this answers the question. Have a nice day.</span>
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The cell spends most of it's time in:
guajiro [1.7K]

Answer:

d

Explanation:

During its life cycle, a typical cell spends most of its time in Interphase, where it grows and carries out its particular job. At some point in its life, it is triggered to divide into two daughter cells.

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3 years ago
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Reactant product
gogolik [260]

Answer:

4 grams

Explanation:

If in an experiment, we have 4g of reactants, the mass of the products will also be 4g.

This is in compliance with the law of conservation of mass in a chemical reaction.

According to this law,

  "in a chemical reaction, matter is neither created nor destroyed but changed from one form to another".

If:

      A + B →  C

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Earth is heated by global warming. How is the water cycle affected by global warming?
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https://www.climaterealityproject.org/blog/climate-change-impacting-water-cycle
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How the insects and earthworms acted during the heat
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3 years ago
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The role that p53 protein plays in suppressing inappropriate progression through the cell cycle depends on all of the following
irinina [24]

Answer:

a. p53 activates transcription of WAF1.

Explanation:

<u>WAF1 transcription occurs independent of p53 during oxidative stress so p53 does not play any role in cell cycle arrest in the signaling pathway which involves WAF1 . </u>

In rest of the mentioned options, p53 plays a role directly or indirectly. During double stranded lesion in DNA in G1 phase, a sensor protein known as ATM binds the DNA lesion site. ATM is a serine/threonine kinase which phosphorylates another kinase known as chk2. After phosphorylation,<u> chk2 stabilizes transcription factor p53.</u> p53 further acts as a transcription factor for the synthesis of a protein known as p21 which inhibits G1 phase specific CDK and ultimately cell is arrested in G1 phase. The cell remains in arrested state until the DNA lesion is fully repaired. <u>Hence, p53 indirectly blocks G1 to S transition with the help of p21. </u>

As such <u>WAF1 transcription factor involving pathway</u><u> </u><u>also requires p21 protein for causing cell cycle arrest but in this pathway p21 is not synthesized with the help of p53. </u>

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3 years ago
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