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chapter 6 chapter te
chapter six chapter quiz
| Question | Answer |
|---|---|
| In an experiment, mice were fed glucose (c6h12O6) containing a small amount of radioactive oxygen. The mice were closely monitored, and in a few minutes radio active oxygen atoms showed up in ________ | carbon dioxide |
| The function of cellular respiration is to _____. | extract usable energy from glucose |
| An electron carrier acts as an energy-storage molecule when it is _____(for example)_____. | reduced.... NADH |
| a molecule is oxidized when it _______. | loses an electron |
| Which one of the following best describes the electron transport chain? | Electrons pass from one carrier to another, releasing a little energy at each step. |
| During respiration in a eukaryotic cell, reactions of glycolysis occur _______. | in the cytosol |
| During respiration in a eukaryotic cell, reactions of the Citric Acid cycle occur in _______. | the fluid within the mitochondrion |
| In preparing pyruvic acid to enter the Citric Acid cycle, which of the following steps does not occur? | Lactic acid is formed |
| When pyruvic acid is converted to acetyl CoA _______. | carbon dioxide and Nadh are formed |
| Most of the NADH that delivers electrons to the electron transport chain comes from _____. | the Citric Acid Cycle |
| Why is the Citric Acid cycle called a cycle? | the two-carbon acetic acid binds to a four-carbon molecule that is restored at the end of the cycle to be used again in the Citric Acid Cycle. |
| In the Citric Acid Cycle, the energy production per glucose molecule is _____ | 2 ATP, 6NADH, 2FADHsqaured |
| The major(but not sole)energy accomplishment of the Citric Acid cycle is the ____. | formation of NADH and FADH squared. |
| The enrgy given up by electrons as t hey move through the electron transport chain is used to _________. | pump H+ through a membrane |
| The ATP synthase in a human cell gets energy for making ATP directly from _______. | the flow of H+ through a membrane |
| In respiration, which one of the following is not done directly by the electron transport chain (or its components)? | add a P to ADP, making ATP |
| Which part of the breakdown of glucose requires molecular oxygen? | the electron transport chain |
| During aerobic respiration, molecular oxygen is used to ________. | at the end of the electron transport chain to accept electrons and form H2O. |
| Which one of the following is the source of the energy that pumps hydrogen ions across the inner mitochondrial membrane? | electrons |
| Most of the ATP produced in cellular respiration comes from _______. | the flow of electrons across the inner mitochondrial membrane. |
| When a poison such as rotenone blocks the electron transport chain, glycolysis and the Citric acid cycle soon grind to a halt as well because, ______. | they run out of NAD+ and FAD+ |
| In cellular respiration,___is oxidized and ___, is reduced. | glucose... oxygen |
| Fermentation is essentially glycolysis plus an extra step in which pyruvic acid is reduced to form lactic acid or alcohol and carbon dioxide. This last step____. | enables the cell to recycle NAD+ |
| Sports physiologists at an Olympic training center wanted to monitor athletes to determine at what point their muscles were functioning anaerobically. They could do this by checking for a build up of _____. | lactic acid |
| How much ATP can a cell make from one glucose molecule in the presence of carbon Monoxide? | 2 ATP |
| In glycoloysis in the absence of oxygen, cells need a way to regenerate which compound? | NAD+ |