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Goshia [24]
3 years ago
7

Jenny is learning about the importance of the ozone layer. She was upset to know that there is a depletion of the ozone layer an

d human activities are adding to it. While she decides to spread awareness on the effects of pollution and reasons to curb it, she cannot do anything about the natural process of ozone depletion. What is the natural process that is causing the depletion of the ozone layer?A. one that ensures ecological balance. burning of fossil fuelC. UV rays reacting with the O2 molecules. carbon cycle. oxygen cycle
Biology
2 answers:
Marianna [84]3 years ago
8 0

UV rays reacting with the O2 molecules

I might be wrong a little but

Hope the helps :)

Gemiola [76]3 years ago
6 0

Answer: UV rays reacting with the O2 molecules (Option C)  

Explanation:

Ozone in the earth's stratosphere is created by UV light striking oxygen molecules containing two oxygen atoms, splitting them into individual oxygen atoms called atomic oxygen. then atomic oxygen combines with unbroken O2 to create ozone (O3)

There are other causes of ozone depletion  as well :

Human activity such as the release of various compounds containing CFC’s is a major cause of ozone damage. CFC is the most evident and the most destructive molecule.  Natural sources also contributes to the depletion of the ozone layer.



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Translation ends when
Y_Kistochka [10]

<span>Translation

</span>Remember that transcription happens in the nucleus as it changes from DNA to mRNA.  In translation,
    the mRNA first has to leave the nucleus and go into the cytoplasm of the cell.  The process of translation actually occurs in the cell’s ribosomes.

<span>
</span>The process of translation uses the genetic code on the mRNA strand to direct the construction (making) of a protein molecule. <span>
</span>1.  A ribosome attaches to an mRNA molecule in the cytoplasm.<span>
</span>2.  As each codon passes through the ribosome, tRNA molecules bring the matching amino acids into the ribosome.  Each tRNA has a set of 3 unpaired nitrogenous bases called an anticodon which matches up with the codon coming through the ribosome.  So one end of a tRNA has an anticodon and the other end carries the amino acid which is how the code is translated.<span>
</span>3.  The ribosome and the rRNA molecules it contains attach the amino acids together as they are being translated.  The protein chain will keep growing until the ribosome reaches the stop codon on the mRNA.  At that point, translation is done and the ribosome lets go.


Hope this helps!!! 

6 0
3 years ago
What is the function of red blood cells
horrorfan [7]
It carries oxygen throughout the body
5 0
3 years ago
Read 2 more answers
During a routine prenatal care visit, a pregnant woman in her last trimester of pregnancy reports that she has occasional shortn
Gala2k [10]
Shortness of breath is very common in the last trimester of pregnancy. This is because, the baby inside the uterus is growing and it starts to push the uterus that compresses the lungs above the diaphragm. This, leads to restricted expansion of the lungs while breathing and causes shortness of breath. Another reason for shortness of breath can be due to low iron content in the body.
If a pregnant woman in her last trimester reports occasional shortness of breath, the nurse should instruct her to:
1. take deep breath and start doing prenatal yoga
2. sleep on the left hand side
3. practicing good posture and standing straight
4. relax as much as possible
4 0
3 years ago
A gene on human chromosome 15 is expressed throughout the body. However, in the brain, only the maternal copy of the gene is exp
lord [1]

Answer:

C) Through genomic imprinting, methylation regulates expression of the paternal copy of the gene in the brain.

Explanation:

The pattern of gene expression wherein either paternal or maternal gene is expressed in specific cells while the other one is prevented from expression is known as genomic imprinting.

In the given example, the maternal copy of the gene on chromosome 15 is expressed in brain cells while its paternal copy is not expressed in these cells. Hence, the pattern of expression of this gene is regulated through genome imprinting. One of the mechanism is methylation of cytidine residues of CpG islands of the DNA that are more frequently present within promoters of the genes.

When the cytidine residues of these sequences are methylated into 5-methylcytidine, the transcription factors do not bind to these promoters preventing the expression of these genes.

Hence, methylation of cytidine residue in CpG islands of the promoters of the gene present on chromosome 15 could have silenced its expression in brain cells.

6 0
3 years ago
Hun1201 what is a leading cause of high blood pressure in children?​
nevsk [136]
E.obesity is the answer
4 0
3 years ago
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