1 1 Red blood cells contain the protein haemoglobin. State the names of the four chemical elements that are found in all proteins. .................................................................................................................................................. .................................................................................................................................................. [2] [Total: 2] 2 Starch is a large molecule. The boxes on the left show the names of some other large molecules. The boxes on the right show some sentence endings. Draw five lines to make five correct sentences. large molecule sentence ending Cellulose is made from amino acids. DNA is made from fatty acids and glycerol. Glycogen is made from glucose. Oil is the genetic material. Protein [5] [Total: 5] 2 3 The diagram shows a section through an egg cell at the time of ovulation. jelly coat cytoplasm with stores of protein and fat nucleus Explain why the egg cell contains stores of protein and fat. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. [3] [Total: 3] 4 The main component of milk is a liquid that is an important solvent in the body. State the name of this solvent. .................................................................................................................................................. [1] [Total: 1] 5 The diagram is of DNA. 3 (a) (i) State the letter of the base that pairs with A. ................................................................................................................................ [1] (ii) State the letters of the other bases in DNA. ................................................................................................................................ [1] [Total: 2] 6 The diagram shows part of a DNA molecule from a chromosome of a cat. Complete the diagram by writing the letters for the base sequence of the other strand of the DNA molecule. [1] [Total: 1] 4 7 Phloem is used to transport sucrose and amino acids in plants. Sucrose is a carbohydrate. Describe the uses of carbohydrates and amino acids in plants. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. .................................................................................................................................................. [4] [Total: 4] 8 Substances that are absorbed from the alimentary canal may enter cells and become part of the cells. State the storage carbohydrate made from glucose in liver cells. .................................................................................................................................................. [1] [Total: 1]
