Biology Chapter 7 Practice Test (Questions & Answers)
Which of the following statements best describes cellular respiration?
Carbon-based molecules from food and oxygen are used to make ATP
Which process breaks down sugars to make ATP when oxygen is present?
Cellular Respiration
Which process is best represented by the following chemical equation? sugars + oxygen ---> carbon dioxide + water
Cellular Respiration
Which of the following types of organisms uses cellular respiration for their cellular energy needs?
Eukaryotes
In which process is lactic acid formed when there is not enough oxygen present for cellular respiration to take place?
Fermentation
Before cellular respiration, glucose must be broken down by the process of
Glycolysis
The part of cellular respiration in which glucose is broken down is called
Glycolysis
Which of the following is a reactant in photosynthesis?
CO2
Which of the following molecules found in the food we eat is most commonly broken down to make ATP?
Carbohydrates
Which end product of alcoholic fermentation is important in the baking industry?
Carbon Dioxide
Which of the following is a product of the Krebs Cycle?
Carbon Dioxide
Which of the following is best shown by Figure 4.2 below?
Electron Transport Chain
What provides the electron transport chain in cellular respiration with the energy it needs to function?
Krebs Cycle
Which end product of fermentation causes the burning feeling muscles that are working hard?
Lactic Acid
The water molecules labeled A in Figure 4.1 are going to the thylakoids to take part in which process?
Light-dependent reactions
The part of cellular respiration that needs oxygen takes place inside the
Mitochondria
An electron transport chain that produces ATP is part of both the cellular respiration processes and
Photosynthesis
What is the main function of the Krebs Cycle?
Producing molecules that carry high-energy electrons to the electron transport chain
Which of the following are end products of glycolysis?
Pyruvate, NADH, and ATP
Chemosynthesis is a process through which some organisms use energy from chemicals in their environment to build sugars in the absence of
Sunlight
Which phrase about fermentation is correct?
Takes place without oxygen
Why does a runner breathe hard for a few minutes after finishing a race?
The runner's cells are making up for an oxygen deficit
What happens to the sugars that are made during photosynthesis?
They can be used for cellular respiration
Where in plant cells are the energy-absorbing molecules for photosynthesis located?
Thylakoids
What is the function of oxygen in cellular respiration?
To pick up electrons at the end of the electron transport chain
Two products of the Krebs Cycle are
ATP and CO2
Which of the following directly provides the energy needed for cell functions?
A phosphate group is removed from ATP
What molecule carries chemical energy that cells use for their functions?
ATP
In the electron transport chain, energy from the Krebs Cycle is used to pump hydrogen ions
Across the inner mitochondrial membrane
Which phrase best describes the main role of fermentation?
Allows glycolysis to continue making a small amount of ATP
