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artcher [175]
3 years ago
15

Describe how nucleotides and hydrogen bonds affect the structure of DNA

Biology
1 answer:
marta [7]3 years ago
3 0
DNA is a group of nucleotides that are linked together. The hydrogen bonds are responsible in making the double helix structure stable. The two strands of DNA are linked and stays in a stable shape because of the hydrogen bonds located between adenosine and thymine base pairs. Three hydrogen bonds are between cytosine and guanine.
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Which of the following choices supports a circular economy?
mamaluj [8]

The answer is A.

Thrift-store donations choices supports a circular economy.

A thrift store receives donated items or sells goods on consignment. It is run by a not-for-profit group instead of a merchant. The reason for establishing a thrift store is to raise money for charities through the not-for-profit group.  The money realized in a thrift store is used to fund a non profit organization or other charity.

7 0
3 years ago
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The Various kinases can be activated by breaks in DNA.
Sonbull [250]

Answer:

The Various Kinases that is activated after the breaks in DNA is after the activation of ATM serine threonine kinase which helps in phosphorylation of other DNA replication check proteins, p53 protein (tumor suppressor protein) etc.

Explanation:

ATM activated by MRN complex at the site of DNA double stranded breaks by phosphorylation. MRN complex activity on ATM induces a conformational change in ATM kinase. So it can bind to its various substrate molecules that helps in DNA replication cycle arrest.

ATM phosphorylates CHK2 protein a product of CHEK2 gene, also known as effector kinases that phosphorylates and helps in deactivation of cyclin dependent kinases (CDKs) that helps in the prevention of progression of mitotic phase.

ATM also phosphorylates the inhibitors of p53 proteins which leads to the overexpression of p21, an inhibitor of (CDKs).

8 0
3 years ago
Which environmental change is not due to the overpopulation of humans?
BlackZzzverrR [31]
A an increase in global warming
8 0
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3. Which of the following is not an X-linked trait?
alexandr1967 [171]

Answer:

Cystic fibrosis

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Cystic fibrosis is an autosomal recessive disorder that affects the digestive system, lungs and liver. The homozygous recessive condition is responsible for the disease cystic fibrosis. Hence, cystic fibrosis is not an X-linked trait.

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Explanation:

6 0
3 years ago
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