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respiration exam questions questions and answers 2024
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respiration exam questions
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respiration exam questionsDefine respiration.(2) - answer-The process by which all living cells release energy from
glucose.
hat is the balanced chemical equation for aerobic respiration? (2) - answer-C6H12O6 +
6O2 ————> 6CO2 + 6H2O
Describe the process of anaerobic respiration in yeast cells and give one use in the food
and drinks industry.(3) - answer-When there is no oxygen, yeast cells break down
glucose into ethanol and carbon dioxide.
-Ethanol is used to make alcoholic drinks.
-Carbon dioxide makes bread rise.
Explain why heart rate increases when beginning exercise.(2) - answer-When
exercising, muscles contract more so will require more energy.
-So they will need more oxygen for more respiration to release more energy.
What are the consequences of lactic acid build up in muscle cells?(2) - answer-Prevents
efficient muscle contraction.
-Causes muscles to become fatigued.
Describe two ways the body removes lactic acid after exercise.(2) - answer-Oxidised to
carbon dioxide and water.
-Converted to glucose then glycogen in the liver.
Define metabolism.(1) - answer-Metabolism is all of the reactions the happen within a
cell or organism.
Name 2 large molecules that are formed from only glucose in plants.(2) - answer-Starch
- and Cellulose.
when will amino acids be broken down to be used for respiration in animals?(3) -
answerWhen there is a shortage of
-glucose,
- glycogen and
-lipids.
An increased cardiac output will provide more oxygen and more glucose to the
working muscles.
Explain how this helps the athlete during exercise.(4) - answer-increased aerobic
respiration
-decreased anaerobic respiration
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