Chapter 2 Flashcards
1
Q
Polypeptide
A
Number of amino acids join in this way
2
Q
Primary Structure
A
specific linear sequence of amino acids in the protein, determined by the genetic material in the nucleus
3
Q
Secondary Structure
A
H bonds form between segments of the folded chain that have come together and help stabilise 3 dimension.
- Alpha Helix
- Beta pleated
- Random coiling
4
Q
Tertiary structure
A
irregular folding held together by ionic or hydrogen bonds forming a complex shape. e.g. myoglobin
5
Q
Substances that can’t cross the plasma membrane
A
- large molecules
- mineral ions
- hydrophillic molecules
- against concentration gradient
6
Q
Channel proteins
A
charged particles, create hyrdophillic passage
7
Q
Carrier proteins
A
hydrophillic uncharged substances, binds to specific cargo molecule
8
Q
Active transport
A
Requires pumps, releases energy as a result of the breakdown of ATP.
