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Year 9 cover lesson Friday 2nd Feb
Year 9 cover lesson
Friday 2
nd
Feb
1 / 29
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Slide 1:
Slide
Science
Lower Secondary (Key Stage 3)
This lesson contains
29 slides
, with
interactive quizzes
and
text slides
.
Lesson duration is:
50 min
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Items in this lesson
Year 9 cover lesson
Friday 2
nd
Feb
Slide 1 - Slide
Slide 2 - Slide
What food test is used to detect the presence of starch?
A
Biuret test
B
Iodine test
C
Ethanol test
D
Benedict's test
Slide 3 - Quiz
What food test is used to detect the presence of reducing sugars?
A
Ethanol test
B
Biuret test
C
Iodine test
D
Benedict's test
Slide 4 - Quiz
What food test is used to detect the presence of protein?
A
Biuret test
B
Sudan III test
C
Iodine test
D
Benedict's test
Slide 5 - Quiz
What food test is used to detect the presence of lipids?
A
Iodine test
B
Benedict's test
C
Biuret test
D
Ethanol test
Slide 6 - Quiz
Slide 7 - Slide
Slide 8 - Slide
What is the main role of enzymes in digestion?
A
To break down food into smaller molecules
B
To transport nutrients to the cells
C
To provide energy for the body
D
To regulate body temperature
Slide 9 - Quiz
What is the role of the enzyme lipase?
A
To convert proteins into amino acids
B
To facilitate absorption of water
C
To break down carbohydrates
D
To break down fats
Slide 10 - Quiz
What is an enzyme?
A
A type of carbohydrate
B
A form of DNA
C
A protein that speeds up chemical reactions
D
A type of lipid
Slide 11 - Quiz
Where are enzymes found in the human body?
A
Only in the blood
B
Only in the liver
C
In various organs and tissues
D
Only in the brain
Slide 12 - Quiz
What is the function of enzymes in the body?
A
To regulate body temperature
B
To store energy in cells
C
To produce hormones in the body
D
To catalyze biochemical reactions
Slide 13 - Quiz
How do enzymes work?
A
By increasing the acidity of the environment
B
By decreasing the substrate concentration
C
By changing the temperature of the surroundings
D
By lowering the activation energy of reactions
Slide 14 - Quiz
What can affect the activity of enzymes?
A
Temperature and pH levels
B
Blood pressure and heart rate
C
Muscle strength and flexibility
D
Emotional state and mental concentration
Slide 15 - Quiz
Where are enzymes typically found?
A
In rocks.
B
In cells.
C
In the atmosphere.
D
In space.
Slide 16 - Quiz
Which part of the enzyme does the substrate bond to?
A
The peptide bond
B
The reactive site
C
The active site
D
The capsule
Slide 17 - Quiz
Slide 18 - Slide
Describe the role of lipase.
Slide 19 - Open question
Name three enzymes present in our digestive system. For each one state the large molecule it breaks down.
Slide 20 - Open question
Name the substrate of amylase and the products of the reaction it catalyses
Slide 21 - Open question
Bread contains carbohydrates. After chewing for a short time bread starts to taste sweet.
Explain why.
Slide 22 - Open question
Which monomers make up fats?
Slide 23 - Open question
Explain why pH affects enzyme activity.
Slide 24 - Open question
Slide 25 - Slide
Name the organ which produces bile.
Slide 26 - Open question
Explain the importance of stomach acid
Slide 27 - Open question
State two functions of bile.
Slide 28 - Open question
Describe the effects of bile on the surface area of fats.
Slide 29 - Open question
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