When living organisms are cooled below some critical body temperature, the metabolic reactions within their cells cease to function properly. This malfunction occurs because there is insufficient molecular motion for substrates to interact their enzymes lose the proper three-dimensional shape the activation energy for the reaction is raised enzyme active sites become permanently bound to substrates TRUE ANSWER : ? YOUR ANSWER : ?
Hexokinase activity in glycolysis is inhibited by fructose 6-phosphate phosphofructokinase fructose 1,6 biphosphate glucose 6- phosphate TRUE ANSWER : ? YOUR ANSWER : ?
An intermediate which inhibits the activity of fructose 1,6 diphos-phatase would inhibit none of these pyrolysis gluconeogenesis glycolysis TRUE ANSWER : ? YOUR ANSWER : ?
In lysozyme catalysis, which of the following does not contribute? The abnormally high pKa of Glu35 Formation of a covalent intermediate at Asp52 The strained conformation of the D sugar Formation of a covalent intermediate at Ser195 TRUE ANSWER : ? YOUR ANSWER : ?
The function of gluconeogenesis is recovery of lactate from fermentation and glycerol from fat breakdown maintenance of blood glucose levels during starvation or a low carbohydrate diet All of these a pathway for the utilization of amino acids TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following enzymes plays an important role in the Cori " cycle? Glucose isomerase Lactate dehydrogenase Glucose-6-phosphate dehydrogenase Glucokinase TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following does not occur during gluconeogenesis? The conversion of PEP to fructose bisphosphate The conversion of pyruvate to phosphoenolpyruvate (PEP) The carboxylation of pyruvate to oxaloacetate The decarboxylation of oxaloacetate to phosphoenolpyruvate TRUE ANSWER : ? YOUR ANSWER : ?
How many ATP equivalents per mole of glucose input are required for gluconeogenesis? 8 4 6 2 TRUE ANSWER : ? YOUR ANSWER : ?
The hormones, glucagon and epinephrine, stimulate glycogen breakdown to G-6-P using ATP as the phosphoryl donor directly, by binding to glycogen phosphorylase only in the liver indirectly, by first stimulating adenylate cyclase to make cAMP TRUE ANSWER : ? YOUR ANSWER : ?
What would be the molecular formula for a polymer made by linking ten glucose molecules together by dehydration synthesis, if molecular formula for glucose is C6H,206? C60H120O60 C60H100O50 (C6H12O6)10 C60H102O51 TRUE ANSWER : ? YOUR ANSWER : ?