A runner's leg muscle cells are respiring aerobically at a high rate. Which pair of substances must the blood keep delivering to those cells?

A sealed jar of soaked, germinating peas turns limewater cloudy within two hours. An identical jar of dry, dormant peas does not. What does this result show?

Aerobic cellular respiration releases carbon dioxide and ATP. Which other substance does it release?

A kangaroo rat living in a desert almost never drinks, yet it does not dry out. Which product of cellular respiration in its own cells makes this possible?

A drug blocks a cell's glucose transporters so no glucose can enter, although oxygen is still plentiful. What happens to aerobic respiration in that cell?

Which statement correctly pairs photosynthesis and cellular respiration by their substances?

A mouse sits in a sealed chamber for 30 minutes. Oxygen falls from 21% to 17% and carbon dioxide rises from 0.04% to 3.8%. What do these measurements show about the mouse's cells?

Yeast is sealed in a bottle of sugar solution with no oxygen. Gas bubbles collect and the liquid comes to smell of alcohol. What are the yeast cells doing?

Which equation summarizes aerobic cellular respiration?

How many molecules of oxygen are used to break one molecule of glucose down completely in aerobic respiration?

How are the summary equations of photosynthesis and aerobic cellular respiration related?

One molecule of glucose contains six carbon atoms. When a cell breaks that glucose down aerobically, where do those carbon atoms end up?

In the balanced summary equation for aerobic cellular respiration, the number of carbon atoms on the reactant side equals the number on the product side.

Some textbooks add ATP to the summary equation for cellular respiration. Where does it belong, and why?

Which summary describes what yeast does to glucose when no oxygen is available?

A cell is treated so that its mitochondria no longer function. The rest of the cell is undamaged and glucose is still supplied. What can the cell still do?

In a eukaryotic cell, where is glucose first split during cellular respiration?

A biologist stains one type of organelle in a muscle cell. The stained structures are where oxygen is consumed and most of the cell's ATP is made. Which organelle was stained?

A leaf cell contains both chloroplasts and mitochondria. Which organelle carries out cellular respiration in that cell?

Which statement describes the order and the location of the two parts of aerobic cellular respiration?

Mature human red blood cells have no mitochondria. What does this mean for how they obtain ATP?

Cyanide blocks the reactions on the inner membrane of the mitochondrion. In a poisoned cell that still has plenty of glucose and oxygen, what happens?

In an animal cell, where is carbon dioxide first released during aerobic respiration?

A muscle cell breaks one molecule of glucose down completely using oxygen. Roughly how many ATP molecules does it gain?

Yeast breaking down glucose without oxygen gains about 2 ATP per glucose molecule. How does that compare with the aerobic yield?

Which statement best describes what a cell does during cellular respiration?

A wolf eats a deer, and the deer had eaten grass. Where did the energy stored in the glucose the wolf's cells break down originally come from?

What happens to an ATP molecule when a cell uses the energy it carries?

A yeast culture gains about 36 ATP per glucose with oxygen and about 2 without it. The culture is switched to anaerobic conditions while its ATP demand stays the same. What must happen?

Why do cells transfer the energy of glucose to ATP instead of powering their activities with glucose directly?

Only part of the energy stored in glucose ends up in ATP. What becomes of the rest?

A cell has plenty of ADP and phosphate available but no glucose or any other fuel molecule. What will happen to its ATP supply?

Kidney tubule cells, which constantly pump dissolved substances back into the blood, contain unusually large numbers of mitochondria. What does that suggest about these cells?

Why does a person's breathing rate rise during hard exercise?

During an all-out sprint, a muscle cell cannot get oxygen delivered fast enough. What does the cell do?

A healthy plant sits in a sealed clear box in bright light, and the oxygen in the box rises steadily. What is happening to respiration in that plant?

Why must an animal keep eating food even on a day it spends resting?

Plants carry out cellular respiration only at night, when they cannot photosynthesize.

Which human body system brings the oxygen used in cellular respiration into the blood?

A mouse and a lizard of equal mass are kept at 10 degrees Celsius. The mouse uses far more oxygen per hour than the lizard does. What does this difference indicate?