What is meant by the term metabolism?
Catabolism and anabolism are the two main types of metabolism - Leaving Cert Biology - Question a - 2017
Question a
What is meant by the term metabolism?
Catabolism and anabolism are the two main types of metabolism.
State whether each of the following processes is an example of... show full transcript
Worked Solution & Example Answer:What is meant by the term metabolism?
Catabolism and anabolism are the two main types of metabolism - Leaving Cert Biology - Question a - 2017
Step 1
What is meant by the term metabolism?
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Answer
Metabolism refers to all the chemical reactions that occur in a body or in a cell. It encompasses all processes that enable organisms to maintain life.
Step 2
State whether each of the following processes is an example of catabolism or anabolism:
1. Photosynthesis.
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Answer
Photosynthesis is an example of anabolism, as it involves the synthesis of complex molecules from simpler ones using energy.
Step 3
2. Respiration.
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Answer
Respiration is an example of catabolism, as it involves the breakdown of complex molecules to release energy.
Step 4
Give two reasons why living things need energy.
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Answer
Living things require energy for various reasons, including:
Movement: Energy is necessary for muscle contractions and locomotion.
Growth: Energy fuels cellular processes that promote growth and tissue repair.
Step 5
In stage 1 of respiration glucose is partly broken down. Where in the cell does this occur?
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Answer
Stage 1 of respiration occurs in the cytoplasm, where glucose is partially broken down.
Step 6
Name the cell structure shown below in which stage 2 of respiration takes place.
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Stage 2 of respiration takes place in the mitochondria.
Step 7
Which type of respiration results in the production of acid in our muscles?
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Answer
Anaerobic respiration results in the production of acid in muscles.
Step 8
What is the name of the acid produced in the muscles?
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Answer
The acid produced in the muscles is called lactic acid.
Step 9
Suggest what might happen to this acid in the muscles afterwards.
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Answer
The lactic acid may be broken down or transported away from the muscles to the liver where it can be converted back into glucose or processed further.
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