Respiration : Practice Questions

What is the primary function of the process of respiration that occurs within the cells of living organisms?

When a scientist measures the products of cellular respiration in a specific organism, they find that glucose is consumed to produce lactic acid and a small amount of energy, without the use of oxygen. In which of the following biological scenarios is this process most likely occurring?

Which of the following statements best explains the chemical relationship between the balanced equation for aerobic respiration and the balanced equation for photosynthesis?

According to the science of living things, in which part of an organism does the process of respiration occur to break down food and release energy?

Consider the process of aerobic respiration in a human body cell. Which of the following best describes the transformation of energy and the identity of the "usable form" of energy produced for the cell?

In an experiment, germinating seeds are placed in a sealed container. A gas sensor detects a decrease in oxygen levels and an increase in carbon dioxide. Explain the significance of the food stored in the seeds for this specific process.

An aquatic plant is kept in a sealed tank in total darkness. After 24 hours, the water becomes slightly more acidic due to the formation of carbonic acid. Explain this observation by relating respiration to the net gas exchange under these conditions.

Explain why a person's breathing rate remains high for a short period even after they have finished a very intense 100-meter sprint, referring to the metabolic byproducts involved.

The human respiratory system ensures that cells receive the gases they need for respiration and that waste products are removed.

a) Name the tiny structures in the lungs where the exchange of oxygen (\(O_{2}\)) and carbon dioxide (\(CO_{2}\)) takes place. (1 point)

b) Compared to the air we breathe in, does the air we breathe out contain more or less water vapour? (1 point)

c) State one specific disease of the respiratory system that can be caused by long-term smoking. (1 point)

d) Is the temperature of exhaled air generally higher or lower than the temperature of the surrounding air on a cold day? (1 point)

An experiment is conducted to compare the metabolic processes in different biological setups.
Setup A: Active yeast cells are placed in a glucose solution and the flask is sealed after removing all air.
Setup B: A grasshopper is placed in a sealed boiling tube containing a small amount of soda lime (to absorb \(CO_{2}\)).

(a) Identify the type of respiration occurring in Setup A. (1 point)
(b) Write the word equation for the respiration process in Setup A. (1 point)
(c) In Setup B, a student observes that the level of a colored water drop in an attached delivery tube moves towards the grasshopper. Explain this observation by referring to the gas exchange taking place. (2 points)
(d) State the energy transformation that occurs in both Setup A and Setup B. (1 point)