Biochemical Molecules GCSE Biology Revision Questions and Answers

Biochemical Molecules GCSE Biology Revision Questions and Answers

Question 1 (1.1)

Using the diagram above, describe the structure of a typical monosaccharide.

Question 2 (1.2)

Explain, with the inclusion of images, glycosidic bonding in molecules of maltose, sucrose and lactose.

Question 3 (1.3)

Explain the classification of common carbohydrates.

Question 4 (1.4)

Using the diagram, with reference to starch and cellulose, describe how the function of polysaccharides is facilitated by their structure.

Question 5 (2.1)

Describe the molecular structure of a fatty acid molecule and a glycerol molecule.

Question 6 (2.2)

Explain the difference between saturated and unsaturated fatty acid molecules.

Question 7 (2.3)

Describe the molecular structure of a triglyceride and a phospholipid and relate these structures to their functions in living organisms.

Question 8 (3.1)

a) Describe the structure of an amino acid

b) How do individual amino acids differ from each other?

Question 9 (3.2)

Explain, using an image, how peptide bonds form.

Question 10 (3.3)

Explain the terms: primary structure, secondary structure, tertiary structure and quaternary structure of proteins. Include an image of each structure to support your explanation.

Question 11 (3.4)

Describe the role of hydrogen bonding in maintaining the shape of a protein molecule.

Assessment Criteria – you will address these criteria by completing the Assignment Tasks.

1.1

Describe the structure of a typical monosaccharide.

1.2

Explain glycosidic bonding.

1.3

Explain the classification of common carbohydrates.

1.4

With reference to starch and cellulose describe how the function of polysaccharides is facilitated by their structure.

2.1

Describe the molecular structure of a fatty acid molecule and a glycerol molecule.

2.2

Explain the difference between saturated and unsaturated fatty acid molecules.

2.3

Describe the molecular structure of a triglyceride and a phospholipid and relate these structures to their functions in living organisms.

3.1

Describe the structure of an amino acid explaining how individual amino acids differ.

3.2

Explain peptide bond formation.

3.3

Explain the terms: primary structure, secondary structure, tertiary structure and quaternary structure of proteins.

3.4

Describe the forces which hold the protein molecule in shape.

Word Count 2000