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3 years ago

How does the structure of amino acids allow them to form a polypeptide

1 answer:

7 0

Amino acids which are known to be linked by peptide bonds they form polypeptide chains.

Proteins are linear polymers are formed by way of linking an a-carboxy group of one amino acid to a-amino of different amino acids which have peptide bond. The formation which results from two amino acids which result in a loss of a water molecule. The best process of the reaction is hydrolysis.

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The image compares the arrangement of electrons in two different neutral atoms.

jekas [21]

Answer:

Option b. Atom P has an estimated Zeff of 7 and is therefore to the right of Atom Q, which has a Zeff of 6.

Explanation:

Please, find attached the figures of both atom Q and atom P corresponding to this question.

The features of atom Q are:

Each black sphere represents an electron

In total this atom has 8 electrons: 2 in the inner shell and 6 in the outermost shell.

Since it is assumed that the atom is neutral, it has 8 protons: one positive charge of a proton balances one negative charge of an electron. Thus, the atomic number of this atom is 8.

Since only two shells are ocuppied, you can assert that the atom belongs to the period 2 (which is confirmed looking into a periodic table with the atomic number 8).

Zeff is the effective nuclear charge of the atom. It accounts for the net positive charge the valence electrons experience. And may, in a very roughly way, be estimated as the number of protons less the number of electrons in the inner shells. Thus, for this atom, an estimated Z eff = 8 - 2 = 6.

The features of atom P are:

Again, each black sphere represents an electron

In total this atom has 9 electrons: 2 in the inner shell and 7 in the outermost shell.

Since it is assumed that the atom is neutral, it has 9 protons.

The atomic number of this atom is 9.

Using the same reasoning used for atom Q, this atom is also in the period 2.

Estimated Z eff = 9 - 2 = 7.

Then, since atom P has a greater Z eff than atom Q (an estimated Zeff of 7 for atom P against an estimated Z eff of 6 for atom Q), and both atoms are in the same period, you can affirm that atom P has a greater atomic number and is therefore to the right of atom Q.

8 0

2 years ago

What is the term for the amount of energy that is needed for a chemical reaction to occur?

cupoosta [38]

This would be the activation energy. This is usually in the form of heat, which allows the reaction to undergo some sort of transition. Many times, enzymes can be used as catalysts to lower the activation energy required for the reaction to take place.

3 0

3 years ago

In molecules, energy is stored in? Atoms Electrons The Nucleus Bonds

Nikolay [14]

Answer:

Atoms

Explanation:

Energy, potential energy, is stored in the covalent bonds holding atoms together in the form of molecules. This is often called chemical energy.

4 0

3 years ago

Please Explain. Why does salt water boil at a lower temperature than tap water?

nexus9112 [7]

We observe that heat capacity of salted water we will find that it is less than pure water. We now that it takes less energy to increase the temperature of the salt water 1°C than pure water. Which means that the salted water heats up faster and eventually reaches to its boiling point first.
hope it helps

5 0

2 years ago

Why does the same side of the moon always face earth? A. The rotational period of earth is the same as that of the moon B. The r

mixer [17]

Answer: A. the rotational period of the earth is the same as that of the moon

3 0

3 years ago

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