Cell Energy Lab Review

In the Cell Energy Lab, the gas that your test subject was blowing into the flask was

• carbon dioxide

• carbon monoxide

• oxygen

• dihydrogen monoxide

Tags

NGSS.MS-LS2-3

In the Cell Energy Lab...

Which of the following describes what occurred?

• As carbon dioxide was blown into the flask the solution became yellow as the carbon dioxide reacted with water to become carbonic acid and reduce the pH of the water.

• As oxygen was blown into the flask the solution became yellow as the water reacted with carbon dioxide to increase the pH of the water.

• As the test subject blew into the solution the increased amount of glucose reacted with solution to produce carbon dioxide and cause the solution to indicate a neutral pH.

• As the test subject blew into the solution the water reacted with the nitrogen in the air creating an aerobic respiration event.

Suppose that there had been no bromothymol blue in the solution placed in each of the flasks (control, exercise, and no exercise) . Which of the following pieces of equipment would have best allowed the students to determine if the concentration of CO₂ dissolved in the solution caused a change?

• Balance

• Scoopula

• Secchi Disk

• pH meter

Bromothymol blue is an indicator solution. The solution in the Cell Energy Lab changed from blue to yellow because

• the solution became more acidic.

• the solution became more basic.

• the solution became neutral.

• the solution was indicating an equal amount of hydroxide and hydrogen ions were present.

Tags

NGSS.MS-PS1-2

Which flask caused the fastest color change to yellow?

• Exercise Flask

• No Exercise Flask

• Control Flask

Thinking about the Cell Energy Lab, which of the following organisms would have caused the solution in the flask to revert back from yellow to blue?

• snail

• aquatic plant

• prokaryote like bacteria

• continuing to blow carbon dioxide into the flask

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-7

In the Cell Energy Lab...

Which of the following best explains what would occur if you added a plant to the yellow solution?

• The plant would take in the carbon dioxide in the solution by undergoing photosynthesis, returning the color back to blue as oxygen and glucose are produced.

• The plant would take in the oxygen and glucose in the solution for cellular respiration and the solution would change back to blue.

• The plant would take in the carbon dioxide for cellular respiration to produce oxygen and glucose.

• The plant would perform a redox reaction with the carbonic acid to revert the solution from yellow to green and back to blue again as the number of hydrogen ions increased in the solution.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following explains why the 'Exercise' flask caused a faster color change?

• When you exercise and your muscles work harder, your body uses more oxygen to produce more ATP energy, which also produces more carbon dioxide. To cope with this extra demand, your breathing has to increase; hence the faster color change.

• When you exercise the thylakoids inside of the chloroplast pump harder to produce ATP energy and the pressure that is release from the pumping is expelled through breathing--causing the color change.

• Because it was the second time you had blown into one of the flasks and you were more effective at changing the color the second time around.

• When you exercise, you breathe out oxygen. The more oxygen you breathe out, the faster the color changes from blue to yellow. Exercising causes you to produce more oxygen, resulting in the indicator to change to yellow faster.

What is underlined in the chemical equation below?

Na + Cl ---> NaCl

• Products

• Reactants

In the chemical equation below, the product is....

Na + Cl ---> NaCl

• Na

• Cl

• NaCl