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MAXImum [283]
3 years ago
14

What is involved in redox reactions

Biology
1 answer:
Ulleksa [173]3 years ago
6 0

any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron

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How does a bacterial cell protect its own DNA from restriction enzymes?
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Answer:

How does a bacterial cell protect its own DNA from restriction enzymes?

B. by adding methyl groups to adenines and cytosines

Explanation:

The restriction modification system is for the cells defense mechanism. This system is composed of a restriction endonuclease enzyme and a methylase enzyme and each bacterial species and strain has their own combination of restriction and methylating enzymes.

Bacteria have restriction enzymes, also called restriction endonucleases, which cut double stranded DNA at specific points into fragments. This restriction enzymes don’t cleave the bacteria's own DNA because restriction enzymes do not exist in the bacterial DNA  sequence.

But is if the recognition sequences exist but the enzyme is methylation specific. Bacteria prevent their own DNA from chop down by restriction enzyme through methylation of the restriction sites. Methylation of DNA is a very familiar way to modify DNA function and bacterial DNA is highly methylated.  

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4 years ago
Enzymes work only on a single substrate, in most cases. true or false.
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Each phospholipid molecule consists of two parts :
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What is the purpose of dissecting a flower? What does it help us investigate?
Andreyy89

Answer:

Flower Dissection A good way to learn about the reproductive parts of a plant is by dissecting a flower. Lilies, irises, or any flower with large parts work well for this project. Use flowers from your yard or check with a local florist for free discarded flowers.

Explanation:

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Yes this is correct well done
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