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Tutor profile: Crystal N.

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Crystal N.
Math Teacher
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Questions

Subject: Basic Chemistry

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Question:

What is an isotope?

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Crystal N.
Answer:

An isotope is one of two or more forms of an element that have the same number of protons but different numbers of neutrons. Isotopes of the same element have the same chemical properties because the number of protons are the same, but their atomic masses differ because of the difference in neutrons.

Subject: Biology

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Question:

What are the basic structural units of DNA? Name all the types of this unit.

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Crystal N.
Answer:

Nucleotides are the basic structural units of DNA. There are four types of nucleotides: adenine, thymine, guanine, and cytosine.

Subject: Algebra

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Question:

When solving the equation 12x + 5 = 3 - 6(x-1), Bob wrote 12x + 5 = 3 - 6x + 1. What algebraic property justifies this step?

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Crystal N.
Answer:

The distributive property

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