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3 years ago

Base-pairing in DNA involves _____. acid-base reaction ionic bonds hydrogen bonds covalent bonds

2 answers:

6 0

The answer is hydrogen bonds.

In the DNA double helix structure nitrogen atoms are chemically bonded to hydrogen atoms. Given that nitgrogen atoms are more electronegative than hydrogen atoms, hydrogen atoms in a base-pairing will bear a partial positive charge.

That partial positive charge is atracted to the oxygen atoms (which are also more electronegative than hydrogen atoms) in the same base pairing in DNA.

That atraction constitutes the hydrogen bond.

vladimir2022 [97]3 years ago

3 0

The answer is hydrogen bonds

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Answer:

<h2>0.36 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

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L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

$n = \frac{2.17 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{2.17}{6.02} \\ = 0.360465...$

We have the final answer as

<h3>0.36 moles</h3>

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