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Ontario Secondary (Grade 9-12) Metabolism — practice questions

Explore 56 free Metabolism questions in Ontario Secondary (Grade 9-12) Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Metabolism questions and exercises with answers

Showing questions 1–30 of 56.

What term describes the study of energy flow through living systems?Read the answer and worked solution →What exactly does a cell's metabolism include?Read the answer and worked solution →Which equation describes the breakdown of glucose?Read the answer and worked solution →Under ideal conditions, how many molecules of ATP are required to synthesize one molecule of glucose in photosynthesis?Read the answer and worked solution →Twelve NADPH molecules are used to build one glucose. Since each is worth three ATP, what is the total molecule equivalent cost of that glucose?Read the answer and worked solution →What is a metabolic pathway?Read the answer and worked solution →Which description matches an anabolic pathway?Read the answer and worked solution →How much ATP can the breakdown of a single glucose molecule yield?Read the answer and worked solution →Which by-product of photosynthesis is required by some cells to carry out cellular respiration?Read the answer and worked solution →How is energy defined?Read the answer and worked solution →A wrecking ball hangs motionless two storeys above a car. What energy does it have?Read the answer and worked solution →Just before a falling wrecking ball hits the ground, what is its energy state?Read the answer and worked solution →Besides the location of matter, what else can potential energy be associated with?Read the answer and worked solution →What is chemical energy?Read the answer and worked solution →After whom is Gibbs free energy named?Read the answer and worked solution →How is absolute temperature in Kelvin obtained from a Celsius reading?Read the answer and worked solution →One kilojoule is equivalent to how many kilocalories?Read the answer and worked solution →A reaction has a negative change in free energy. What does that sign tell you?Read the answer and worked solution →Rusting iron is offered as an example of what important distinction?Read the answer and worked solution →Why does a living cell never reach chemical equilibrium?Read the answer and worked solution →Even an exergonic reaction needs a small energy input before it can proceed. What is that input called?Read the answer and worked solution →Why must a molecule be contorted before its bonds can break?Read the answer and worked solution →Where does the activation energy for a chemical reaction typically come from?Read the answer and worked solution →Besides heating, what other change to a system makes chemical reactants react more frequently?Read the answer and worked solution →In thermodynamics, what is meant by the surroundings?Read the answer and worked solution →In thermodynamic terms, how is heat energy defined?Read the answer and worked solution →What is entropy a measure of?Read the answer and worked solution →Rank solids, liquids and gases from lowest to highest entropy.Read the answer and worked solution →What is adenosine triphosphate made of?Read the answer and worked solution →Adenosine is a nucleoside. Which two parts make it up?Read the answer and worked solution →

Worked practice questions

What term describes the study of energy flow through living systems?

  1. Thermodynamics
  2. Bioenergetics
  3. Catabolism
  4. Osmoregulation
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Correct answer: B. Bioenergetics

1. Bioenergetics is the study of energy flowing through living systems, such as cells. 2. Thermodynamics is the broader study of energy and energy transfer involving physical matter, living or not. 3. Catabolism names one class of metabolic pathway rather than a field of study. 4. Osmoregulation concerns the control of water balance, which is a different problem entirely. _Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 6 "Metabolism", section 6.1 Energy and Metabolism_

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What exactly does a cell's metabolism include?

  1. Only the reactions that release energy
  2. Only the reactions that consume energy
  3. Only the reactions taking place in mitochondria
  4. All reactions inside cells, energy using and releasing
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Correct answer: D. All reactions inside cells, energy using and releasing

1. All of the chemical reactions that take place inside cells make up the cell's metabolism. 2. That total includes both the reactions that use energy and the reactions that release energy. 3. Metabolism is therefore composed of building, called anabolism, and degradation, called catabolism. 4. Restricting it to one direction, or to one organelle, leaves out half or more of what the word covers. _Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 6 "Metabolism", section 6.1 Energy and Metabolism_

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Which equation describes the breakdown of glucose?

  1. Glucose plus oxygen yields carbon dioxide, water and energy
  2. Carbon dioxide plus water plus energy yields glucose
  3. Glucose plus water yields carbon dioxide and oxygen
  4. Oxygen plus energy yields glucose and carbon dioxide
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Correct answer: A. Glucose plus oxygen yields carbon dioxide, water and energy

1. Living things consume sugar as a major energy source because sugar molecules store a great deal of energy in their bonds. 2. Breaking glucose down consumes six oxygen molecules and yields six carbon dioxide, six water and energy. 3. Energy appears on the product side, which marks this as a reaction that releases energy. 4. The second option is the reverse equation, the synthesis of glucose during photosynthesis, with energy as an input. _Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 6 "Metabolism", section 6.1 Energy and Metabolism_

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