Cambridge IGCSE Biology 0970 (November 2023)
- Characteristics and classification of living organismsLecture 15 Topics|1 Quiz
- Lecture 23 Topics|1 Quiz
- classified questions – ch.12 Topics
- Organisation of the organismLecture 33 Topics|1 Quiz
- Classified questions – ch.22 Topics
- Movement into and out of cellsLecture 44 Topics|1 Quiz
- Classified questions – ch.32 Topics
- Biological moleculesLecture 55 Topics|1 Quiz
- Classified questions – ch.42 Topics
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- Question 1 of 6
1. Question
Small molecules are used as the basic units in the synthesis of large food molecules.
Which statement is correct?
CorrectIncorrect - Question 2 of 6
2. Question
The diagram represents a protein molecule
what do the small circles represent?
CorrectIncorrect - Question 3 of 6
3. Question
Which simple molecules are the basic units of protein?
CorrectIncorrect - Question 4 of 6
4. Question
Which food-testing reagent shows a positive result when it turns from blue to purple?
CorrectIncorrect - Question 5 of 6
5. Question
Which row correctly identifies the chemical elements found in proteins
Carbon
Hydrogen
Oxygen
Nitrogen
A
✔️
✔️
✔️
✔️
B
✔️
✔️
✔️
X
C
✔️
X
✔️
X
D
X
✔️
X
✔️
Key
- ✔️= present
X = absent
CorrectIncorrect - Question 6 of 6
6. Question
Nutrients are made up of smaller basic units. Nutrients can be identified by food tests.
Which nutrient is a protein?
Smaller basic units
Food test
A
Amino acids
Benedict’s test
B
Amino acids
Biuret test
C
Sugars
Benedict’s test
D
Sugars
Biuret test
CorrectIncorrect