Question 29 Amino acids are represented by three-letter and _____________ abbrev

Question

Question 29

Amino acids are represented by three-letter and _____________ abbreviations.

two-letter

roman numeral

one-letter

four-letter

none of the above

1 points

Question 30

Molecules that influence protein activity by binding to sites that are distinct from the active site are called _____________________________.

hemoglobin effectors

allosteric effectors

stereoisomer effectors

enzyme catalysts

none of the above

1 points

Question 31

__________ chromatography uses electrostatic interactions between the protein and the solid matrix to fractionate proteins.

Ion-exchange

High performance liquid

Affinity

Reverse phase

Gel filtration

1 points

Question 32

Normal adult hemoglobin differs from sickle cell hemoglobin by ____________ amino acid(s).

four

five

three

One

two

two-letter

roman numeral

one-letter

four-letter

none of the above

Explanation / Answer

Question 29:
(c) One-letter.Amino acids are represented by a single upper case letter or a three-letter abbreviation. For example, valine is known by the letter V or the three-letter symbol val.

Question 30:
(b) Allosteric effectors.Molecules that influence protein activity by binding to sites that are distinct from the functional or active sites are called allosteric effectors.

Question 31:
(a)Ion exchange chromatography. Ion-exchange chromatography uses electrostatic interactions between the protein and the solid matrix to fractionate proteins.

Question 32:
(d)One.Sickle hemoglobin differs from normal hemoglobin by a single amino acid: valine replaces glutamate at position 6 on the surface of the beta chain. ... In a sickled red blood cell, valine 6 (beta chain) binds to a different hydrophobic patch.

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