Investigations (Grade 11 NSC Matric Life Sciences): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
How long must a plant be kept in darkness to destarch it before a photosynthesis experiment?
How long must a plant be kept in darkness to destarch it before a photosynthesis experiment?
48 hours
What colour indicates a positive result in the iodine starch test?
What colour indicates a positive result in the iodine starch test?
Blue-black
Why is ethanol heated in a water bath rather than directly during the starch test?
Why is ethanol heated in a water bath rather than directly during the starch test?
Ethanol is highly flammable
In the light investigation, what is the purpose of covering part of a leaf with aluminium foil?
In the light investigation, what is the purpose of covering part of a leaf with aluminium foil?
To block light from reaching that area
What does sodium hydroxide do in the carbon dioxide investigation?
What does sodium hydroxide do in the carbon dioxide investigation?
Absorbs from the air
In a variegated leaf test, which areas turn blue-black with iodine?
In a variegated leaf test, which areas turn blue-black with iodine?
Green areas only
What test is used to prove that oxygen gas is produced during photosynthesis?
What test is used to prove that oxygen gas is produced during photosynthesis?
Glowing splint test
What happens to a leaf during step 2 of the starch test when placed in ethanol?
What happens to a leaf during step 2 of the starch test when placed in ethanol?
Chlorophyll is dissolved
What role does carbon dioxide play in photosynthesis?
What role does carbon dioxide play in photosynthesis?
Raw material for building glucose
In the light investigation, which section is the control?
In the light investigation, which section is the control?
The uncovered section