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biochem exam1 multch

multiple choice and short answer from exam one

QuestionAnswer
The aqueous solution with the lowest pH is? 0.1 M HCL
The aqueous solution with the highest pH is? 0.1 M NaOH
Which of the following amino acids contain hydrophobic side chain? Leucine
Two amino acids of the standard 20 contain sulfur atoms. They are? Methionine and cysteine
For amino acids with neutral R groups, at any pH below the pI of the amino acid, the population of amino acids in solution will have a net positive charge
A pentapeptide has four peptide bonds
The functional group present in the following molecule is called: CH3CONHCH2CH3 Amide
Which of the following solutions will be isotonic with 3M sucrose? 1 M Sodium Sulfate
Which of the following is a nonstandard amino acid? 5-Hydroxyproline
Which of the following is a heterocyclic amino acid Proline
Which of the following amino acids would be classified as a nonstandard amino acid? Cystine
How many standard amino acids are there 20
which of the following is a polar amino acid? Tyrosine
A compound has a pKa of 7.4. To 100 mL of a 1.0 M solution of this compound at pH 8.0 is added 30 mL of 1.0 M hydrochloric acid. The resulting solution is pH? 7.8
Of the 20 standard amino acids, only ... is not optically active. The reason is that its side chain... glycine; is a hydrogen atom
What is isoelectric point (pI)? Where the net charge of an amino acid in a solution is equal to zero (or neutral)
What is the difference between oligopeptide and polypeptide? Oligo has 10-20 AAs and Poly has 21-50 AAs
Give at least examples of 5 essential amino acids tryptophan, methionine, leucine, isoleucine, lysine, phenylalanine, arginine, threonine and valine
Metabolism the total of all chemical reactions in an organism
homeostasis the "equilibrium" that our body maintains in order to maintain a quality of life
Electrostatic interaction noncovalent attraction between oppositely charged atoms or groups.
Created by: rachchap8
 

 



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