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Aerobic Respiration in Yeast Experiment

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Questions and Answers

What is the independent variable in the investigation of aerobic respiration in yeast?

pH level

Volume of yeast suspension

Concentration of glucose

Temperature (correct)

Why is it essential to maintain a constant concentration of dye in the experiment?

To allow for a consistent volume of substrate

To ensure the yeast cells are not exposed to toxins

To avoid interfering with the temperature measurement

To keep the respiration rates consistent across tests (correct)

What happens to the rate of aerobic respiration when the temperature exceeds 40°C?

It remains constant

It increases significantly

It fluctuates inconsistently

It decreases due to enzyme denaturation (correct)

How is the rate of aerobic respiration measured in this investigation?

By the time taken for the dye to change color Signup and view all the answers

What can be inferred about the relationship between temperature and the kinetic energy of molecules involved in respiration?

Increased temperature raises kinetic energy, facilitating more frequent collisions Signup and view all the answers

What does the discolouration of methylene blue indicate in the experiment involving yeast cells?

It measures the rate of aerobic respiration. Signup and view all the answers

Which method is NOT appropriate for investigating the respiration rate of yeast?

Adding a large quantity of oxygen to the mixture. Signup and view all the answers

What is the role of glucose solution in the respiration experiment with yeast?

It provides a source of energy for yeast respiration. Signup and view all the answers

In the context of the experiment, what happens when the temperature is increased?

The rate of respiration typically increases. Signup and view all the answers

What experimental equipment is NOT directly used to measure respiration rate?

Spectrophotometer Signup and view all the answers