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Course: Igcse Biology
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Igcse Biology

14. Coordination and Response

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16. Reproduction

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17. Inheritance

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19. Organisms and their Environment

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Quiz

Biological Molecules – Check yourself

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Biological Molecules IGCSE Biology check yourself quiz: free practice for IGCSE Biology. Work through this Biological Molecules IGCSE Biology check yourself quiz and get instant feedback on every answer. If you get stuck, review the 4.1 Biological molecules — Notes lesson. More practice: IGCSE Biology — all units. Syllabus: Cambridge IGCSE Biology 0610 syllabus.

1.
Which reagent tests for protein?
Iodine
Benedict's
Biuret
DCPIP
2.
Which element is found in proteins but not in carbohydrates?
Carbon
Hydrogen
Oxygen
Nitrogen
3.
Which base pairs with cytosine in DNA?
Guanine
Adenine
Thymine
Uracil
4.
What is starch made from?
Amino acids
Glucose
Fatty acids
Glycerol
5.
Which test requires heating?
Iodine
Biuret
Benedict's
Ethanol emulsion
6.
A positive result for fat in the ethanol emulsion test is:
Purple colour
Blue-black colour
Brick-red precipitate
Cloudy white emulsion
7.
Which statement best describes Amino acid?
The small unit from which proteins are built.
The pairing of complementary bases in DNA: A with T, and C with G.
A carbohydrate made of glucose that forms plant cell walls.
A molecule made of carbon, hydrogen and oxygen, e.g. glucose, starch, glycogen, cellulose.
8.
Which statement best describes Solvent?
A carbohydrate made of glucose that forms plant cell walls.
A liquid in which substances dissolve; water is the main solvent in living organisms.
A carbohydrate made of glucose, used for energy storage in animals (liver and muscles).
The small unit from which proteins are built.
9.
Which statement best describes Cellulose?
A molecule made of carbon, hydrogen and oxygen, e.g. glucose, starch, glycogen, cellulose.
The pairing of complementary bases in DNA: A with T, and C with G.
A molecule made of amino acids joined in chains; contains C, H, O and N.
A carbohydrate made of glucose that forms plant cell walls.
10.
Which statement best describes Base pairing?
A carbohydrate made of glucose, used for energy storage in animals (liver and muscles).
A liquid in which substances dissolve; water is the main solvent in living organisms.
A molecule made of fatty acids and glycerol; contains C, H and O.
The pairing of complementary bases in DNA: A with T, and C with G.
11.
Plants store carbohydrate as:
Glycogen
Starch and sucrose
Fat only
Chitin
12.
Which nutrient is the main source of energy?
Carbohydrates
Minerals
Vitamins
Water
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