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3 years ago

How did qualitative chemical and enzyme tests help avery identify dna as the transforming principle?

2 answers:

7 0

Qualitative chemical and enzyme tests helped Avery identify DNA as the transforming principle by conducting a series of tests to find out if the transforming principle was DNA or a protein and the result is that no protein was present but that DNA was present. Hope this answers your question.

kvv77 [185]3 years ago

5 0

Answer:

Qualitative chemical and enzyme tests help Avery to identify DNA as the transforming principle as they clarify the chemical nature of genes, that they are form of nucleic acids.

Explanation:

One of Avery’s qualitative chemical test result was that the transforming principle could precipitate with alcohol, so this demonstrate it was not a carbohydrate.

The enzyme test demonstrated that proteases (enzymes that digest protein) and lipases (enzymes that digest lipids) did not destroy the transforming principle, so the scientist concluded that it was neither a protein nor a lipid.

The bacteriologist found out that the transforming principle was formed of nucleic acids so they tested the sample with ribonuclease (enzyme that digest RNA) but it did not inactivate the substance. And finally he tested it with deoxyribonuclease and it was enzymatically destroyed. So he concluded that the isolated transforming principle was DNA.

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All of the alkali earth metals, Group 2, have two valence electrons. Which of these would represent the oxidation number of the

juin [17]

Your answer should be C.) +2. "All the elements in Group 2 have two electrons in their valence shells, giving them an oxidation state of +2."

Credits: https://chem.libretexts.org/Core/Inorganic_Chemistry/Descriptive_Chemistry/Elements_Organized_by_Blo...

Hopefully this has helped! :)

5 0

3 years ago

Explain atoms contain positively charge protons and negatively charge electrons. why does an ordinary atom have no charge?

tatiyna

An ordinary atom is balanced for instance, lithium has 3 protons and 3 electrons the positively charged proton cancels the negatively charged electron.

THINK math plus 3 and negative 3 = 0 neutral

3 0

3 years ago

Determine the molarity of 1.2 mol KCl in 1.1 L of a solution?

victus00 [196]

Answer:

1.1 M

General Formulas and Concepts:

Molarity = moles of solute / liters of solution

Explanation:

Step 1: Define variables

1.2 mol KCL

1.1 L of solution

M = unknown

Step 2: Solve for Molarity

Substitute: M = 1.2 mol/1.1 L
Evaluate: M = 1.09091

Step 3: Check

We are given 2 sig figs. Follow sig fig rules.

1.09091 M ≈ 1.1 M

7 0

3 years ago

Why is the chemistry of actinoids complicated?

gladu [14]

Answer:

Explanation:

Actinoids are the series have 15 element in the periodic table.

Chemistry of actinoids are complicated because of the following reasons.

Their outer most orbitals are 6d and 7s but most of the electrons resides in 5f orbitals. These orbitals are most exposed to environment and incoming electron picked up by 5f orbital instead of 6d or 7s orbitals.
They are radioactive elements that couldn't be handle in normal condition to study their properties.
Their f-orbital can accommodate 14 electrons and they have many variable oxidation state.
5d electron donot contribute in the formation of chemical bonds.
They have a very strong tendency to make complexes
Most of the actinoides are artificial and are in very minute in amount. they are in very less quantity that is amounts found in nano-grams so are more expensive too and
As they are radioactive so their half life is very short and in very less time the decay occur so couldn't be study as upon decay their actual properties changed.

Due to all the above reasons it make difficult for a chemist to study about the chemical properties of actinoids.

8 0

3 years ago

Someone pls help me I will make you brain

Andreyy89

c- i and iii

I hope this helps

6 0

3 years ago