Which of these is a mixture? A) air B) water C) hydrogen chloride D) carbon dioxide
2 answers:
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A chemical compound is substance that is made up of similar molecules made of atoms from different elements tied together with chemical bonds. A mixture is a combination of 2 or more substances. Water, Hydrogen Chloride, and Carbon Dioxide are chemical compounds while Air is a mixture.
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Answer:
Explanation:
In RNA (ribonucleic acids), the nitrogen bases are:
- Adenine
- Guanine
- Cytosine
- <em>Uracil</em> (there is thymine in DNA, but not in RNA)
The bases pair like:
- Adenine (A) with Uracil (U)
- Cytosine (C) with Guanine (G)
So, the base pairs for RNA are <u>A with U </u>and <u>C with G</u>