How many distinct tripeptides can be made from the two amino acids: leucine and histidine? Each amino acid may be used more than once. number of distinct tripeptides:

The correct answer is "8".

Explanation:

The formula to calculate the number of peptides that can be synthesized from a certain number of different amino acids is given as follows:

"n^r"

where "n" is the number of amino acids and "r" is the length of the peptide.

In this case,"n" is 2, since the peptides are synthesized with 2 different amino acids: leucine and histidine; and "r" is 3, since the length of tripeptides is 3 amino acids.

Therefore, the number of distinct tripeptides is given by the formula "2^3", which is "8".

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.