Biochemistry 1

A 0.5 mol dm³ solution of sucrose was heated at 80 °C for 5 min with Benedict’s reagent. What was the resulting colour?

• blue

• blue-black

• purple

• brick red

A carbon compound extracted from living tissue was found to contain exactly twice as many hydrogen atoms as oxygen atoms.

To which of the following classes of biological molecule is it likely to belong?

• carbohydrate

• lipid

• nucleic acid

• protein

For the processes shown in questions 3-6, identify the reaction type A – D.

3 maltose → glucose

• reduction

• oxidation

• hydrolysis

• condensation

4 amino acids → polypeptide

• reduction

• oxidation

• hydrolysis

• condensation

5 cytochrome C Fe ²⁺ → cytochrome C Fe ³⁺

• reduction

• oxidation

• hydrolysis

• condensation

6 NADH → NAD⁺

• reduction

• oxidation

• hydrolysis

• condensation

identify the bonds found in the biological molecule: Haemoglobin

• glycosidic

• peptide

• ester

• phosphodiester

identify the bonds found in the biological molecule: Triglyceride

• glycosidic

• peptide

• ester

• phosphodiester

identify the bonds found in the biological molecule: Collagen

• glycosidic

• peptide

• ester

• phosphodiester

identify the bonds found in the biological molecule: RNA backbone

• glycosidic

• peptide

• ester

• phosphodiester