1.23 a) Protein Structure Flashcards
The distinguishing features of protein molecules are the __ nature and their ability to ___ to other molecules.
folded, bind
Proteins are made of ___ ___.
amino acids
The amino acid sequence determines the ___ ___ and is held together by ___ ___.
protein structure, peptide bonds
A peptide bond is a chemical bond that forms between two amino acids when the ___ group of one molecule and the ___ group of another react, releasing a ___ molecule.
amino, carboxyl, water
The _ groups of amino acids are responsible for the unique characteristics of ___ and often interact with other ___
R, proteins, molecules (eg integral/peripheral membrane proteins interacting with phospholipids, binding them to the membrane)
The R groups of amino acids vary in s__, s__, c__, c__ r__, and h__ b__ c__.
size, shape, charge, chemical reactivity, and hydrogen bonding capacity
There are four groups of amino acids, which are classified by their R groups. Name them please.
Acidic,
Basic,
Polar,
Hydrophobic.
Describe the four types of amino acids/R groups.
Acidic is ___.
Basic is ___.
Polar is ___.
Hydrophobic is ___.
acidic is negative,
basic is positive,
Polar is hydrophilic,
hydrophobic is non-polar.
The wide range of functions carried out by proteins is a result of the ___ of _-___.
Diversity, R-groups
The structure of a polypeptide has (how many?) ___ divisions, each combining to make a unique ___.
four, protein
The primary structure of a polypeptide is…
the order of amino acids in the polypeptide chain
The secondary structure of a polypeptide is…
The hydrogen bonding along the backbone
The hydrogen bonding of secondary structure can fold the polypeptide into ___ ___, ___ ___ or ___.
Alpha helices, beta sheets, turns
The alpha helices look like ___ stranded RNA.
The beta sheets can be ___ or __-___.
single.
parallel, anti-parallel
The tertiary structure of a polypeptide is when the ___ polypeptide is ___.
entire, folded
