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Andrews [41]
2 years ago
5

Describes hydrogen bonding in DNA?

Biology
1 answer:
Bas_tet [7]2 years ago
8 0

Answer: Hydrogen bonds are created between the base pairs in DNA. Adenine pairs with thymine and cytosine pairs with guanine. Adenine and thymine create 2 hydrogen bonds while cytosine and guanine create 3. These bonds are fairly weak so that they can be broken when DNA is replicated (by an enzyme called helicase which unwinds DNA). However despite them being weak they do stabilize DNA's double helix structure as well.

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3 years ago
Limestone is a rock formed from calcite. Calcite can be easily dissolved by acids. Marble is a rock formed from limestone. There
Umnica [9.8K]

Answer:

All of these are correct

Explanation:

According to the question, marble is a rock formed from limestone, which in turn is also formed from Calcite. This shows that marble is a kind of metamorphic rock because a metamorphic rock is any rock that is formed by the alteration of other rocks caused by heat, pressure or chemicals etc. These changes that occurs in the previously existing rocks are called METAMORPHOSIS.

Hence, since marble is formed from limestone, it concludes that marble is a metamorphosed rock formed from a previously existing limestone rock. Also, since Calcite, a precursor of limestone that marble is formed from can be degraded by acids, both limestone and marble which are formed from it will also be dissolvable by acids.

8 0
3 years ago
Can a person’s genotype be determined by their phenotype? Why or why not?
julsineya [31]

Answer:

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Explanation:

4 0
3 years ago
In cell membranes with aquaporins can water move across the membrane?
stiks02 [169]

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Explanation:

please always check over answers and hope this helps!!!

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Anyone got the answers for this worksheet?
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Answer:

78 is the answer

Explanation:

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