Prescribed Experiments (LC 2026) (Leaving Cert Biology): Flashcards
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Practise the cards
15 cards from this deck
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Practise the cards
15 cards from this deck
Number of prescribed experiments in LC Biology
Number of prescribed experiments in LC Biology
21
Questions to complete in Section B (out of 3)
Questions to complete in Section B (out of 3)
Two
Total marks for Section B experiments
Total marks for Section B experiments
60 marks
Purpose of a control in an experiment
Purpose of a control in an experiment
Provides a standard for comparison/measurement
Reagent for reducing sugar test
Reagent for reducing sugar test
Fehling's or Benedict's solution
Positive result for reducing sugar test
Positive result for reducing sugar test
Blue to brick red
Reagents for protein (biuret) test
Reagents for protein (biuret) test
Sodium hydroxide + copper sulphate
Positive result for protein test
Positive result for protein test
Blue to lilac
Reagent for starch test
Reagent for starch test
Iodine
Positive result for starch test
Positive result for starch test
Brown to blue/black
Test method for lipid/fat
Test method for lipid/fat
Brown paper - translucent spot appears
Positive result for CO₂ with limewater
Positive result for CO₂ with limewater
Milky appearance
Function of visking tubing in osmosis experiment
Function of visking tubing in osmosis experiment
Acts as selectively permeable membrane
Function of washing up liquid in DNA isolation
Function of washing up liquid in DNA isolation
Breaks down cell membrane
Function of ice cold ethanol in DNA isolation
Function of ice cold ethanol in DNA isolation
Causes DNA to separate (DNA is insoluble in it)