Do the tests performed to identify DNA exclude the presence of RNA?

Chemistry

2 answers:

Umnica [9.8K]3 years ago

7 0

Answer:

so the answer is no

both DNA and RNA are together.

Explanation:

DNA and RNA can also be ISOLATED from the same. biological sample

Ratling [72]3 years ago

5 0

DNA and RNA can also be ISOLATED from the same biological sample.

So the answer is no, both DNA and RNA are together.

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Describe what conditions exist in water molecules to make them dipolar.

lesantik [10]

<span>The bent geometry of the water molecule gives a slight overall negative charge to the oxygen side of the molecule and a slight overall positive charge to the hydrogen side of the molecule. This slight separation of charges gives the entire molecule an electrical polarity, so water molecules are dipolar.</span>

4 0

3 years ago

1. Explain what is in a buffer. Discuss the function of a buffer. How will pH change when small amounts of acids or bases are ad

Nastasia [14]

Answer:

(1) See below, (2) About 8.4 pH, (3) About 3.981 * 10⁻⁶ mol dm⁻³

Explanation:

1. A buffer is a solution that resist pH when adding a basic or acidic compound. It's purpose is to neutralize added acids and bases.

2. Remember that the formula for pH is -log [H+]. We have a 0.1 M solution of baking soda in water with [H+] of about 4.0 × 10⁻⁹. Therefore we can calculate the pH as follows...

pH = -log (4.0 × 10⁻⁹)

pH = -(-8.39794...) = (About) 8.4 pH of 0.1 M of baking soda

3. This question has a similar set up...

pH = -log [H+]

[H+] = inverse of log^- pH

[H+] = 10^-5.4 = (About) 3.981 $*$ 10⁻⁶