Chemistry, 06.11.2019 21:31 francisco2001

Adna molecule is said to "unzip" when it is involved with cell division, which means the two strands of the molecule separate in order to combine with new strands. which of the following statements is consistent with this process of "unzipping"?
(a) to "unzip", a dna molecule breaks the covalent bonds for its base pairs (the functional groups along the molecule).
(b) dipole forces between base pairs must be overcome in order to separate the strands.
(c) hydrogen bonding is involved with holding the strands together.
(d) none of the previous statements are correct.

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Answer from: austintules2005

The answer to your question is: letter C

Explanation:

Introduction:

In DNA double helix, each nucleotide attach to another nucleotide with hydrogen bonds because these kind of bonds are not the strongest of the bonds, but are strong enough to mantain the double helix attached and during the process of unzipping double helix can separate easily.

Then:

(a) To "unzip", a DNA molecule breaks the covalent bonds for its base pairs (the functional groups along the molecule). Base pairs are not attached by covalent bonds because these bonds are strong and difficult to break down. So this option is incorrect.

(b) Dipole forces between base pairs must be overcome in order to separate the strands. As it was describe above base pairs are attached by hydrogen bonds, dipole forces is not an option to this example.

(c) Hydrogen bonding is involved with holding the strands together. This i the right option, double helix is attahced by hydrogen bonding.

(d) None of the previous statements are correct. This is not possible because doulbe helix is attach by hydrogen bonding.

Answer from: Quest

explanation:

Answer from: Quest

definition

entropy is a measure of the randomness or the extent of disorder of a chemical process.

enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

entropy is measured in joule per kelvin (jk⁻¹) whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.

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Adna molecule is said to "unzip" when it is involved with cell division, which means the two strands...

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