5 Written questions
5 Matching questions
- precursors from the environment
- Protein Properties
- Nucleic Acids
- a Mostly single stranded; uracil in place of thymidine; mRNA; rRNA, tRNA
- b DNA and RNA; Basic Unit- nucleotide; Building Blocks- a cyclic pentose sugar; phosphate; nitrogenous base. DNA lacks a hydroxyl group making it more flexible.
- c m. wt. 10^3- 10^9; nucleic acids, proteins, lipids, polysaccharides. 4 most important to study.
- d Allosteric proteins- dual affinity (hemoglobin); denaturation and re-naturation of proteins; enzymatic activity (catalysts)- apo enzyme and holo enzyme; lowering of activation energy; E+S <-> [ES]-> Product + Enzyme
- e CO2, H2O, NH3, N2, etc.
5 Multiple choice questions
- m. wt. = 10^6-10^9; ribosomes, enzyme complexes, contractile systems, microtubules.
- proteins and RNA
- Made up of repeating units of amino acids (about 20 types); Subunits linked by peptide bonds forming polymers; Function: structural support, antibodies, contractile fibers, toxins, transport.
- The inhibitor binds to ES complex so that further reaction does not take place - either forward or backward.
- glucose and galactose
5 True/False questions
Competitive Inhibition → occupy the active site
Enzymes → Biological catalysts- specific for a chemical reaction; not used up in that reaction; Apoenzyme: protein.
Co-factor: non-protein component; Coenzyme- organic cofactor (NAD, FAD); Holoenzyme-Apoenzyme + cofactor.
Activation Energy → The overall 3D structure of the polypeptide chain. Held together by different bonds: peptide, ionic, hydrogen, covalent, sulfhydryl, etc. Prions are proteins that don't take their correct 3D shape and are harmful; mad cow disease.
Oligosaccharides → +NH3-CHR-COO-; dipolar charges neutralize each other; side chain determines the charge. Carboxylic group and amino group form the peptide bond (H2O leaves). Peptide glycosidic bonds most important; 150 in our body only 20 make proteins. you have 3AA that make a tripeptide 3^3= 27 different combinations. more than 200 AA in a protein on average.
Sucrose → glucose and fructose; bad for teeth