Demonstration of the digestion of starch during germination by a seed (LC 2026) (Leaving Cert Biology): Quizzes
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Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is germination?
What is germination?
Regrowth of embryo after dormancy
Which enzyme digests starch during seed germination?
Which enzyme digests starch during seed germination?
Amylase
Why are broad bean seeds soaked overnight in water?
Why are broad bean seeds soaked overnight in water?
To soften testa coat & activate enzymes
Why is one of the soaked seeds boiled in this experiment?
Why is one of the soaked seeds boiled in this experiment?
To denature enzymes & act as a control
At what temperature are the starch agar plates incubated?
At what temperature are the starch agar plates incubated?
27°C
How long are the agar plates incubated?
How long are the agar plates incubated?
48 hours
What happens when iodine is added to the experimental plate (germinated seed)?
What happens when iodine is added to the experimental plate (germinated seed)?
It stays brown
What happens when iodine is added to the control plate (boiled seed)?
What happens when iodine is added to the control plate (boiled seed)?
It turns from brown to blue/black
What does a clear ring around the bean indicate?
What does a clear ring around the bean indicate?
Where starch was digested
Why are seeds dipped in methylated spirits using flamed forceps?
Why are seeds dipped in methylated spirits using flamed forceps?
To prevent contamination by microorganisms
How should the cut seeds be placed on the starch agar plates?
How should the cut seeds be placed on the starch agar plates?
Cut side down
What does iodine solution test for?
What does iodine solution test for?
Starch