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s344n2d4d5 [400]
4 years ago
12

Which one of the following statements is correct? View Available Hint(s) Which one of the following statements is correct? Adeni

ne forms two covalent bonds with thymine; guanine forms three covalent bonds with cytosine. Adenine forms three covalent bonds with thymine; guanine forms two covalent bonds with cytosine. Adenine forms three hydrogen bonds with thymine; guanine forms two hydrogen bonds with cytosine. Adenine forms two hydrogen bonds with thymine; guanine forms three hydrogen bonds with cytosine. Adenine forms two hydrogen bonds with guanine; thymine forms three hydrogen bonds with cytosine.
Chemistry
1 answer:
Dmitrij [34]4 years ago
4 0

Answer:

Adenine forms two hydrogen bonds with thymine;

guanine forms three hydrogen bonds with cytosine

Explanation:

There are three hydrogen bonds between guanine and cytosine. Between adenine and thymine, two hydrogen bonds form. Complementary pairs always include one base of purine and one base of pyrimidine.

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Unlike most chemical changes, most physical changes are easily reversed. When Adrian's teacher dissolves some sugar in a beaker
pochemuha

Answer:

By heating the solution

Explanation:

Physical changes and chemical changes are the two types of changes that a substance undergoes. Physical change does not alter the substance's chemical composition, hence, can be easily reversed. There is also no new product formed. This is contrary to the occurrences of a chemical change, which cannot be reversed after a new product has been formed.

A physical change is what occurs when Adrian's teacher dissolves some sugar in a beaker of water to form a sugar solution. This change does not involve any new product formation, hence, can be reversed. The sugar can be derived back from the solution by HEATING THE SOLUTION. The water (solvent) will evaporate and the sugar (solute) will precipitate.

8 0
3 years ago
I’m only having a problem with this number that’s all if anyone could help I would really appreciate it! Thank you!
Masja [62]

Answer:D.

Explanation:i used photo math. It is really helpful when I'm doing math homework etc...

7 0
3 years ago
Box 1
Alex73 [517]

10g

Explanation:

Box 1, Mass of A = 10g

Box 2, Mass of B = 5g

Box 3, = 1A + 1B

Unknown:

Mass of B that would combine with mass of 20g of A

Solution:

   Mass ratio of A to B:

   \frac{mass of A}{mass of B} = mass ratio

           \frac{10}{5} = mass ratio

        The mass ratio of A to B = 2: 1

Now, number of B that will combine with 20g of A;

       

           \frac{mass of A}{mass of B} = mass ratio

               \frac{20}{mass of B} = \frac{2}{1}

                     Mass of B = 10g

10g of B would combine with 20g of A

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ATP is synthesized in the mitochondria.
The mitochondria is known to be the powerhouse of a cell.


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