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Quiz Chapter 9
Cell Biology
| Question | Answer |
|---|---|
| Yeasts use fermentation to synthesize ATP | in the absence of oxygen |
| Substrate-level phosphorylation | occurs when a phosphate is transferred to an ADP from a specific phosphorylated substrate |
| Oxygen is toxic to | strict anaerobes |
| Glucose is transported in the bloodstream to cells in all parts of your body. In body cells, glucose has four main fates. Which of the following is NOT one of those fates? | Glucose is transformed into sucrose |
| Reduction in biological systems is usually accompanied by | hydrogenation |
| The breakdown of glucose to pyruvate by a cell is an example of a(n) _________reaction | catabolic |
| A phosphoanhydride bond | is a high-energy bond has a standard free energy of hydrolysis of -7.3kcal/mol is broken by hydrolysis |
| Within animal cells, glycolysis and gluconeogenesis must not occur at the same time. Therefore, regulation is important. Which of the following is LEAST important in the regulation of glycolysis and gluconeogenesis? | NADH |
| The glycolytic enzymes that are allosterically regulated __________. | are enzymes that catalyze irreversible reactions |
| Which is the correct net reaction for the conversion of glucose to lactate in muscle? (remember this includes glycolysis + fermentation) | glucose + 2ADP + 2Pi yields 2 lactate + 2ATP + 2 H2O |
| Compared to glucose, oxidation of which of the following is more important in humans as a source of ATP? | fats |
| In the first step of glycolysis, glucose can be phosphorylated because | a phosphoanhydride bond has higher energy of hydrolysis than a phosphoester bond the transfer of a phosphate from ATP to glucose is exergonic |
| The process by which animals synthesize glucose and other carbohydrates from 3- and 4-carbon precursors is known as _____________. | gluconeogenesis |
| Which of the following are mechanisms by which glycolysis is regulated to control intracellular ATP levels? | phosphofructose kinase-1 activation by AMP phosphofructose kinase-1 inhibition by ATP phosphofructose kinase-1 activation by AMP hexokinase inhibition by glucose 6-phosphate |
| During strenuous exercise, hypoxic muscle cells convert pyruvate to ____________ | lactate |
| An energy-requiring pathway is also known as | anabolic |
| Which of the following act(s) as an electron acceptor during glycolysis? | NAD+ |
| __________is the carbon-containing compound produced by glycolyis | Pyruvate |
Created by:
mjs021
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