Number of possible anything (MCAT)

[dcamkl1]

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Hey guys,

In studying for the MCAT, I'm trying to organize a list of formulas that yield the number of possible anything (# of possible stereoisomers, # of amino acid combinations, etc.).

I know it's trivial and has a small chance of showing up as a discrete.

So far, I have:

1) Number of possible stereoisomers = 2^n, where n = # chiral carbons

2) Number of possible amino acid combinations = 20^n, where n = # a.a. in the sequence.

I feel like there's more, but I can't think of any at the moment.

Can you guys add or think of any more permutations and combinations?

 

[yoyohomieg5432]

Hey guys,

In studying for the MCAT, I'm trying to organize a list of formulas that yield the number of possible anything (# of possible stereoisomers, # of amino acid combinations, etc.).

I know it's trivial and has a small chance of showing up as a discrete.

So far, I have:

1) Number of possible stereoisomers = 2^n, where n = # chiral carbons

2) Number of possible amino acid combinations = 20^n, where n = # a.a. in the sequence.

I feel like there's more, but I can't think of any at the moment.

Can you guys add or think of any more permutations and combinations?

not quite a straightforward equation but you should be able to do the probabilities for stuff like punnet squares. and if you're given two genotypes like AaBBCc and aaBbcc find the probability of child having aaBbCc or something like that

 

[doctorswole]

4L + 2 electrons possible (s,p,d,etc.)

degree of unsaturation: (2C - H + 2 - X +N)/2