Candidate Name Centre Number 0 Candidate Number GCSE 243/01 SCIENCE BIOLOGY FOUNDATION TIER BIOLOGY 3 P.M. WEDNESDAY, 20 May 2009 45 minutes For Examiner s use ADDITIONAL MATERIALS In addition to this paper you may require a calculator. Question Maximum Mark 1 7 2 6 3 7 4 8 5 7 6 7 7 6 8 2 Total 50 Mark Awarded INSTRUCTIONS TO CANDIDATES Write your name, centre number and candidate number in the spaces at the top of this page. Answer all questions. Write your answers in the spaces provided in this booklet. INFORMATION FOR CANDIDATES The number of marks is given in brackets at the end of each question or part-question. You are reminded of the necessity for good English and orderly presentation in your answers. VP*(S09-243-01)
2 Examiner Answer all questions. 1. (a) (i) Draw lines to join the names of the structures with the correct functions. [3] One has been done for you. Structure blood vessel white blood cell platelets plasma red blood cell Function carries oxygen blood clotting defence against disease carries blood around the body carries carbon dioxide (ii) Which part of the blood carries hormones? [1]............................................................................................... (b) (i) On the diagram below, label one white blood cell with the letter A and one red blood cell with the letter B. [2] (ii) State one difference between a red and a white blood cell which can be seen in the diagram. [1].................... 7
3 Examiner 2. Read the following information. Bakers use a microbe called yeast when they make bread. A sugar solution is stirred into the yeast, at 20-25 C. This activates the yeast cells, respiration begins and the cells grow. Active yeast is mixed with flour to make dough. The yeast produces gas bubbles which make the dough rise, ready for baking. Use the information to answer the questions. (a) (i) Name the microbe used in breadmaking. [1] (ii) What must be added to make this microbe active? [1] (iii) Between what temperatures does this microbe grow? [1] (b) (i) Which process produces the gas which makes dough rise? [1] (ii) Name the gas in the gas bubbles. [1] (c) Explain why dough doesn t rise if placed in a fridge at 3 C. [1]........................................................................ Turn over. 6
4 Examiner 3. (a) Some structures are labelled on the following diagram of the heart. D A B C Right Left (i) Complete the table using letters from the diagram. One has been done for you. [2] Structure Aorta Letter D Ventricle Valve (ii) What is the function of a heart valve? [1]....................
5 Examiner (b) The diagram below shows a small blood vessel found in the body. flow of blood blood vessel Y body cells (i) Name blood vessel Y. Underline the correct answer. [1] artery capillary vein (ii) Choose words from the list to complete the sentences below. [3] carbon dioxide, oxygen, diffusion, protein. As the blood flows through the body organs................................................................, which cells need, passes out of the blood and................................................................., which cells produce, passes into the blood. These substances enter and leave the body by.................................................................. Turn over. 7
6 Examiner 4. The diagram shows the structure inside a human kidney. nephron K L N M (a) Give the letters which show [3] cortex;.......................... medulla;.......................... pelvis........................... (b) Complete the following sentences about urine, the solution which leaves the kidney. Use some of the words from the list. [4] urea, ureter, urethra, bladder, protein. (i) Urine contains the waste product................................................................ (ii) Urine leaves the kidney in the................................................................ (iii) Urine is stored in the................................................................ (iv) Urine leaves the body through the................................................................
7 Examiner (c) From the table below, name the substance not removed from the blood by the kidney. [1] Substance Blood entering kidney / units Blood leaving kidney / units water 230 174 glucose 168 168 mineral salts 325 302............ Turn over. 8
8 Examiner 5. (a) There are three main types of microbes. Bacteria Fungi Viruses (i) Which microbe reproduces by dividing into two? [1] (ii) Which microbe can reproduce inside a host cell? [1] (iii) Name the types of microbes shown in the diagrams. (Not drawn to scale). [2] cytoplasm cell wall cell membrane loop of DNA protein coat small numbers of genes.................................................................. (iv) Underline the correct statement below: [1] bacteria are smaller than viruses bacteria are larger than viruses bacteria are the same size as viruses (b) Sangita placed bacteria onto agar, as shown in the diagram. wire loop with bacteria agar in Petri dish (i) How would she sterilise the loop before using it? [1].................... (ii) After adding the bacteria she sealed the dish with tape to keep the lid in place. Why? [1].................... 7
9 Examiner 6. (a) A student placed the root of a living plant in red dye for 24 hours. After 24 hours he cut a section through the region just behind the root tip. He viewed the root section under the low power of a microscope and drew a diagram which is shown below. root hair tissue stained red by the dye (i) Name the tissue stained red by the dye. [1] (ii) State (I) the function of the root hairs; [1]...... (II) how a root hair is adapted to carry out its function. [1]...... Turn over.
10 Examiner (b) The potometer shown below was set up to measure the rate of water uptake by a cut, leafy shoot. It was placed on a laboratory bench near an open window. cut, leafy shoot water graduated scale in mm glass tubing air bubble introduced into tube water beaker (i) Explain how the potometer can be used to measure the rate of water uptake by the cut, leafy shoot. [2].................. (ii) State one environmental factor that will increase the rate of water uptake of the cut, leafy shoot. [1] (iii) What name is given to the loss of water vapour from leaves? [1] 7
11 Examiner 7. Bacteria cause milk to go sour. During the souring of milk, the amount of oxygen in it decreases. (a) Explain how bacteria affect the concentration of oxygen in milk. [1].................................... (b) Cows milk can be treated in two main ways to increases the length of time that it can be stored safely. Pasteurisation milk is heated to 71.7 C for 15 seconds and cooled quickly. Ultra Heat Treated (UHT) milk is heated to 135 C for at least 1 second and cooled quickly. In an experiment to compare the freshness of different kinds of milk, tubes were set up as shown in the table. Equal volumes of milk were added to each tube. 1cm 3 of a blue dye was also added to each tube. The dye changes from blue to pink to white as oxygen decreases in the milk. All tubes were kept at 30 C. The colour of the dye was recorded every 30 minutes. Time/min UHT Type of milk in each tube 1 day old pasteurised milk 3 day old pasteurised milk untreated milk 0 blue blue blue blue 30 blue blue blue pink 60 blue blue pink white 90 blue pink white white 120 blue pink white white (i) Why were all the tubes treated in the same way? [1].................... (ii) Which tube had the greatest number of bacteria after 30 minutes? [1] (iii) (I) Which milk was the freshest after 120 minutes? [1] (II) Explain your choice and why it remained freshest. [2]............ (Questions continue over the page) Turn over. 6
12 Examiner 8. (a) What is meant by the term antibiotic resistance? [1]........................................................................ (b) Give one example of a bacterium that is antibiotic resistant. [1] 2