Biomolecules Flashcards
1
Q
Vilka är de olika kemiska bindningarna?
A
Covalent bonds - sharing electrons
Ionic bonds - stealing electrons (katjon & anjon)
Hydrogen bonds - “weak ionic bonds”
Van der Waals
2
Q
Proteins has … linkage
A
peptide
3
Q
Amino acids contain…?
A
One amino group, carboxyl group, r chain
4
Q
What is a disulphide group?
A
cysteine side group can react with another cysteine group: -SH + -SH, leads to covalent bond
5
Q
A protein has 4 different structures, which?
A
- Primary - amino acid monomers are joined, forming peptide bonds
- Secondary - polypeptide chains may form alfa helix or beta pleated sheets, hydrogen bonds
- Tertiary - polypeptides fold, forming specific shapes, hydrogen bonds, disulphide bonds, hydrophobic bonds
- Quaternary - two or more polypeptides assemble to form larger protein molecules, hydrogen bonds, disulphide bonds, hydrophobic bonds, ionic interactions
6
Q
Carbohydrates has … linkage
A
glycosidic
7
Q
What kind of linkage does cellulose (polysaccharide) contain?
A
beta
8
Q
What kind of linkage does starch & glycogen contain?
A
glucose monomers connected by alfa 1,4 and alfa 1,6 linkages
9
Q
Nucleic acids has … linkages
A
phosphodiester
10
Q
An amino acid sequence starts with … and ends with …
A
N- & -C
