Download presentation
Presentation is loading. Please wait.
1
1 The study of biochemistry is necessary to understand Microbiology Habitat Diet
2
2 Why Chemistry? Conflict between microbe and host. Vibrio cholera toxin inserting into intestinal cells.
3
3 Terms and Definitions to review and Remember: Atom, protons, neutrons, electrons, isotopes, elements, molecules, ions, anions, cations, compounds, covalent bonds, ionic bonds, hydrogen bonds, pH, acids, and bases. Solution Suspension And colloids
4
4 Chemical Reactions Synthesis or decomposition reactions –More when we cover metabolism. ReactantsProducts (general) Substrate(s)Products(enzymatic) C 12 H 22 O 11 + H 2 O 2 C 6 H 12 O 6 Hydrolysis (left to right) Dehydration (right to left) + H2O http://www.unisanet.unisa.e du.au/08365/timages/sucro se.jpg
5
5 Covalent and Hydrogen bonds Water Covalent Bonds: sharing of electrons between the oxygen and hydrogen atoms. Strong. Hydrogen bonds: electrical attraction between electronegative oxygen atom and nearly naked proton. Weak. mdp2.phys.ucl.ac.uk/ Talks/Ice/Ice.html
6
6 H-bonds hold large molecules together Example: A-T base pair in DNA http://www.mun.ca/biology/scarr/Fg10_16a.gif
7
7 Hydrophilic and hydrophobic Surfaces made of molecules without polar groups (e.g. CH 3 CH 2 CH 2 CH 2.) repel water.
8
8 Functional Groups
9
9 Small molecules (monomers) and macromolecules (polymers) Ethylene and polyethylene
10
10 Carbohydrates: CH 2 O Monosaccharides: glucose, fructose, many others Disaccharides: sucrose, lactose Oligosaccharides: found on glycoproteins, in cytoplasm (oligo- means “few”) Polysaccharides: starch, glycogen, agar, chitin, xanthan gum
11
11
12
12
13
13
14
14 A nucleotide: a monomer of DNA http://www.emc.maricopa.edu/faculty/farabee/BIOBK/nucleotide.gif
15
15 Nucleic acids are the polymers made from nucleotides. DNAtRNA http://www.biochem.uwo.ca/meds/medna/IMG/tRNA.GIF
16
16 The structure of DNA
17
17
18
18 Phospholipids are essential building blocks for membranes; sterol-type molecules are rarely found in bacteria.
19
19 A lipid polymer: a biodegradable plastic made by bacteria.
20
20 Inclusions of PHB in a bacterial cell
21
21
22
22
23
23
24
24
Similar presentations
© 2024 SlidePlayer.com Inc.
All rights reserved.