Science Home Learning Task. Year 9. GCSE Cell structure and transport

Transcription

1 Science Home Learning Task Year 9 GCSE Cell structure and transport Name Tutor Group Teacher Given out: Monday 23 April Hand in: Monday 30 April Parent/Carer Comment Staff Comment GCSE level Target

2 Investigating science Welcome to your science homework booklet. This booklet is designed to give you some extra practise on the key areas in Biology Paper 1, the cell structure and transport section of the GCSE course. All sets need to carry out tasks 1, 2, 3, and 6. Sets 1 and 2 should choose either task 4 or 5. Each question has been given a GCSE level to show the level you are working at. Don t forget to fill in the last page and ask a parent/carer to sign the box on the front

3 TASK 1- Multiple choice quiz (level 3-5) Try the multiple choice quiz below. Tick the correct option from those below. 1. Some cells are specialised in order to carry out particular jobs. The following structures belong to particular specialised cells. Which of the options shows the correct functions of these structures? 2 What type of cell is shown in the diagram? Animal cell Plant cell Bacterial cell Yeast cell

4 3 Which of the following correctly defines active transport? Substances move from a region of high concentration to a region of low concentration Substances can move without the use of energy Substances move against a concentration gradient across a partially permeable membrane The movement of water molecules only 4 Which of the following structures is found in plant cells, and not in animal cells? Cytoplasm Ribosome Permanent vacuole Nucleus 5 Which of the following cells would contain a lot of mitochondria? Ovum (egg cell) Muscle cell Skin cell Leaf cell 6 Which of the following is a correct definition of diffusion? Diffusion is the spreading of particles resulting in a net movement from a region where they are in low concentration to a region of higher concentration. Diffusion is the spreading of particles resulting in a net movement from a region where they are in high concentration to a region of lower concentration. Diffusion is the net movement of particles against a concentration gradient. Diffusion is the net movement of water from an area of high concentration (of water) to an area of low concentration (of water) along a concentration gradient.

5 7 Where in a cell are proteins made? Nucleus Chloroplasts Ribosomes Mitochondria 8 What type of plant cell carries water around the plant? Root hair cell Xylem cell Phloem cell Photosynthetic cell 9 Which of the following diagrams shows a correctly labelled animal cell?

6 TASK 2 Animal and plant cells 1. In the boxes below, draw and label the general structure of a plant cell and an animal cell (level 3). Plant cell Animal cell

7 2. Complete the table below about plant and animal cells by filling in either the name of the organelle or its function (levels 4-5). Organelle Function A liquid gel in which the organelles are suspended. Chemical reactions happen here. Nucleus Controls the passage of substances in and out of the cell. Mitochondria Ribosomes Contain chlorophyll. Needed to absorb light so the plant can make food by photosynthesis. Made of cellulose. Strengthens the cell and gives it support. Permanent vacuole 3. Name 3 structures found in plant cells but not animal cells (level 4).

8 4. What is meant by a eukaryotic cell? Give an example (level 4). What is meant by a prokaryotic cell? Give an example (level 4). Describe the difference between the genetic material in a prokaryotic and a eukaryotic cell (levels 5-6). 5. What is a specialised cell? (level 4). Name 3 specialised animal cells (level 5).

9 Choose one of the specialised animal cells you have named. Make a sketch below of the cell you have chosen (levels 3-4). Write down the function of the specialised cell you have drawn above and state any adaptations it has to help it carry out this function (levels 5-6).

10 Plants also have specialised cells such as the root hair cell. Draw the structure of a root hair cell in the box below (levels 3-4). Write down the function of the root hair cell and state any adaptations it has to help it carry out this function (levels 5-6).

11 The phloem and xylem cells are two other examples of specialised cells in plants. Choose one of these two cells and write about its function in the plant as well as any adaptations it has to carry out its role in the plant. Include a diagram or picture of your chosen cell too (levels 4-6). TASK 3 Transport in plants and animals 1. What is the meaning of diffusion? (level 4)

12 Give an example of where diffusion happens in the body and describe how it happens (level 4-5). State one factor that can affect the rate of diffusion and explain how it causes the effect (level 6). 2. What is osmosis? (level 4).

13 What do the terms hypertonic, isotonic and hypotonic mean? (levels 4-5). Isotonic Hypertonic Hypotonic Which one or ones of the above terms can be harmful to cells in our bodies such as red blood cells? Describe the effect that can result in our cells. You can include diagrams to help your explanation (levels 5-6).

14 3. Active transport is another transport method carried out by plants and animals. Describe how a living organism (plant or animal) uses active transport to help it survive. Include the substance(s) that the plant or animal moves using this method (levels 5-7). Sets 1 and 2 should choose to do either task 4 or task 5 you do not have to do both Sets 3 and 4 try task 6

15 TASK 4 Sets 1 and 2 only - Comparing transport methods (levels 4-7). In TASK 3, you looked at the different methods that plants and animals use to move substances around. In this task, you need to compare the 3 different transport methods diffusion, osmosis and active transport. Include both similarities and differences between the methods. Show your answer as a table or bullet points in the space below.

16 TASK 5 Sets 1 and 2 only - Six-mark question (levels 4-8). The six-mark question is a long-answer question designed to test your knowledge about a topic and your writing skills. Answer the question below on the space underneath. In this question you will be assessed on using good English, organising information clearly and using specialist terms where appropriate What adaptations would you expect to see in an animal with effective exchange surfaces? List these adaptations and explain the importance of each adaptation. Plan your six-mark answer here.

17 TASK 5 continued Write your six-mark answer in the space below.

18 TASK 6 Revision crossword (levels 3-5). Solve the crossword below as a way of assessing what you do and don t yet know.

19 Across 1. Where protein synthesis happens in a cell. 10. The movement of water from an area of high concentration to an area of low concentration along a concentration gradient. 11. The membrane around the contents of a cell which controls what moves in and out of the cell. 12. A liquid in which some solids will dissolve. 13. The water-based gel in which the organelles of all living cells are suspended. 15. A group of different tissues working together to carry out a particular function. 16. Allowing only certain substances to pass through. 17. Adapted for a particular function. 18. The solid which dissolves in a solvent to form a solution. 19. The movement of substances against a concentration gradient and/or across a cell membrane, using energy. Down 2. An instrument used to magnify specimens using a beam of electrons. 3. Membrane-bound structures in the cytoplasm of a cell which carry out particular functions. 4. The site of aerobic cellular respiration in a cell. 5. A group of organs working together to carry out a particular function. 6. An instrument used to magnify specimens using lenses and light. 7. A group of specialised cells all carrying out the same function. 8. The gradient between an area where a substance is at a high concentration and an area where it is at a low concentration. 9. An organelle found in many living cells containing the genetic information. 14. The movement of particles of a gas or a solute from an area of high concentration to an area of low concentration (along a concentration gradient).

20 Self Evaluation of my Homework I am a R learner. I know this because: I believe that my effort and attitude to learning for this booklet is a: I know this because: