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ZRT Biochem
| Question | Answer |
|---|---|
| What 2 monosaccharides make up lactose? | Galactose and glucose |
| What 2 monosaccharides make up sucrose? | Glucose and fructose |
| Which polysaccharide is composed of glucose units linked by alpha-1,4-linkages? | amylose |
| What polysaccharide has glucose linked by alpha-1,4 and alpha,1-6 linkages | glycogen |
| What polysaccharide has long chains of alpha-1,4- linkages and every 25 molecules has an alpha-1,6- branch? | Amylopectin |
| What polysaccharide has glucose moleculesbound at beta 1-4 linkages | cellulose |
| Which disaccharide has 2 glucose units | Maltose |
| Salivary amylase breaks down what type of linkages | alpha-1,4 |
| Maltase cleaves which linkage? | Alpha-1,4 |
| The enzymes maltase, sucrase, dextrinase and lactase are found where? | In the brush borders of the mucosal cells |
| What is the rate limited enzyme in the reaction of fructose to glucose? | Fructokinase |
| What is the rate limiting enzyme in the reaction of galactose to glucose? | galactokinase |
| Dextrin is only released from the hydrolysis of which polysacchardie | Amylopectin |
| What hormone is released when glucose levels are high? | Insulin |
| Which organ keeps a constant level of glucose in teh blood by storing and producing it as needed? | Liver |
| Which tissues do not require insulin to take up glucose? | Brain, RBC, Liver |
| Which hormones are released when glucose levels are down? | Glucagon Epinephrine Cortisol |
| Which of the catecholamines stimulates gluconeogenesis? | Epinephrine |
| Glucokinase is only found in which organs? | Liver |
| In what part of the cell does glycolysis occur? | Cytosol |
| What enzyme allows the liver to trap glucose in the form of glucose-6-phosphate | Glucokinase |
| What are the 3 rate limiting enzymes of glycolysis? | Glukokinase/hexokinase Phosphofructokinase Pyruvate kinase |
| How many molecules of pyruvate do we get from one molecule of glucose? | 2 |
| What mineral is required for the phosphorylation reactions of glucokinase and phosphofructokinase? | Magnesium |
| What is the net "harvest" from aerobic glycolysis? | 8 ATP |
| Which Krebs cycle intermediate inhibits action of phosphofructokinase and therefore inhibits glycolysis | Citrate |
| What is the net harvest of anaerobic glycolysis? | 2 ATP |
| What is the aerobic fate of pyruvate? | Acetyl SCoA |
Created by:
Krys2287
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