4.7.2 Enzymes (Structured Question 1 & 2)

Question 1:Diagram I shows the organelles involved during the synthesis and secretion of an enzyme in an animal cell.(a) Name the organelles labelled J and L.(b)(i) State the function of organelle M.(b)(ii) Explain the role of organelle K in the synthesis of the enzyme.(c)Enzymes are widely used in our daily life and industries.Explain how enzymes … Read more4.7.2 Enzymes (Structured Question 1 & 2)

4.7.1 Proteins (Structured Question 1 & 2)

Question 1:Diagram I shows two levels of organization in protein structure.(a) In Diagram I, name the level of organization in the protein structures of P and Q.(b) Describe the structure of protein P.(c) Diagram II shows how protein P is broken down to form products.(d) Explain how the products in Diagram II are formed.(e) State … Read more4.7.1 Proteins (Structured Question 1 & 2)

4.2.2 Disaccharides

Disaccharides are formed when two monosaccharides combine together through a chemical process called the condensation.Disaccharides are known as complex sugar.Examples of disaccharides are,Maltose known as malt sugar. It is a reducing sugarIt is formed from condensation of two glucose molecules.Glucose + glucose → maltose + water Found in germinating cerealsProduced during digestion of starchSucroseIt is found in sugar cane, beet … Read more4.2.2 Disaccharides

4.2.1 Monosaccharides

Monosacharides are monomers of carbohydrates. Examples of monosacharides are:Glucose — found in plants and animals (It is the energy source for cellular respiration)Fructose — found in fruits and honeyGalactose — present in milkThey are reducing sugars, they can remove oxygen from other compounds..They can be detected by using Fehling’s or Benedict’s test. When monosaccharides are heated with … Read more4.2.1 Monosaccharides

4.1 Chemical Composition of the Cell

The elements found in the cell includecarbon, oxygen, hydrogen, nitrogen, sulphur, phosphorus, calcium,sodium,potassium, magnesium,iron chlorine, The chemical compounds in the cell can be classified into two groups, organic: compounds which contain the element carbon and originate from living things. Example: carbohydrates, lipids, proteins and nucleic acidsinorganic: compounds which do not originate from living things. Example: water and mineral salts..Organic compounds are synthesised by the cells themselves whereas … Read more4.1 Chemical Composition of the Cell