10. (a)
(i) What is digestion?
(ii) Name the product of starch digestion in plants - Leaving Cert Biology - Question 10 - 2021
Question 10
10.
(a)
(i) What is digestion?
(ii) Name the product of starch digestion in plants.
(b) The diagram shows the results of an investigation into the digestive ... show full transcript
Worked Solution & Example Answer:10. (a)
(i) What is digestion?
(ii) Name the product of starch digestion in plants - Leaving Cert Biology - Question 10 - 2021
Step 1
What is digestion?
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Answer
Digestion is the biochemical process by which food substances are broken down into smaller, absorbable components. It involves both mechanical and chemical processes that convert food into nutrient molecules.
Step 2
Name the product of starch digestion in plants.
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Answer
The product of starch digestion in plants is maltose or glucose.
Step 3
Name a seed you could use in the investigation.
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Answer
A suitable seed to use in the investigation would be a broad bean or any correctly named seed.
Step 4
Name a type of agar you could use in this investigation.
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Answer
You could use starch agar or milk agar for this investigation.
Step 5
Describe one step taken to minimise contamination during the investigation.
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Answer
One step to minimize contamination is to clean the workbench with a disinfectant or to use sterilized plates and aseptic techniques, such as wearing gloves or washing hands before handling the seeds.
Step 6
Why are there multiple seeds used in each dish?
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Multiple seeds are used in each dish to account for variability; some seeds may be non-viable or dead, ensuring more reliable results.
Step 7
What test reagent or chemical was added to determine if digestive activity had occurred?
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Answer
Iodine was added to test for digestive activity, indicating the presence of starch.
Step 8
Why are there no clear patches in dish B?
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Answer
In dish B, the boiled seeds are either dead or their enzymes have been denatured, meaning starch or protein has not been digested, resulting in no clear patches.
Step 9
What is the purpose of a control in a scientific investigation?
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Answer
The purpose of a control in a scientific investigation is to serve as a baseline, allowing for comparison against experimental groups to validate results.
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