Biology Past Paper PDF

## Multiple choice (10 marks) Fill in the attached bubble sheet for the multiple choice. Make sure to fully colour in the bubble letter corresponding to the correct answer. 1. Which of these types of cells/tissues can differentiate into all types of specialized cells? - Adult stem cells -...

## Multiple choice (10 marks) Fill in the attached bubble sheet for the multiple choice. Make sure to fully colour in the bubble letter corresponding to the correct answer. 1. Which of these types of cells/tissues can differentiate into all types of specialized cells? - Adult stem cells - Connective tissue - Zygote/embryo stem cells - Epithelial tissue 2. Which of these processes should occur to prevent a cancerous cell from spreading? - Cell specialization - Diffusion - Cell respiration - Apoptosis 3. Based upon the image to the right, what type of tissue would it most likely be? - Fat - Muscle - Nerve - Epithelial 4. Which of these systems includes external skin and hair? - Reproductive - Integumentary - Endocrine - Skeletal 5. A person is experiencing low blood pressure going through most arteries in their body. Which part of the heart would be affected? - Right atrium - Septum - Left ventricle - Upper part 6. If the pancreas is affected in digestion, which one of these would be a likely outcome? - Not enough nutrients absorbed into bloodstream - Too much acid in the stomach - Food would be too large and chunky - Solid waste would be too dry ## Name: 7. A patient has food that isn't always being swallowed properly, and they sometimes choke on their food. Which two (2) organs/structures are affected? - Larynx and esophagus - Alveoli and capillaries - Bronchi and diaphragm - Epiglottis and trachea 8. This is an image of plant cells under medium power (20x) with a field of view (FOV) of 2mm. What is the approximate length of one of these plant cells? - 1 mm - 2 mm - 4 mm - 8 mm 9. Which objective lenses should you only use the fine adjustment knob on a light microscope? - Low power - High power - Medium power - Eye-piece 10. Which of these imaging technologies provides the most detail of internal organs, and is also one of the safest?  - MRI - X-rays - Ultrasound - CT scan ## Short answers and Extended response (30 marks) Answer the following questions in the spaces provided. 1. First label each cell as either plant or animal (2 marks). Then choose 4 organelles/structures within the diagram below, name the organelle/structure, and give a detailed description of what it does and contains. (10 marks) | Type of Cell: | Type of Cell: | | :----------- | :----------- | | Plant | Animal | | Letter | Name of Organelle/Structure: | Description of function | | :----- | :--------------------------- | :---------------------- | | E | Nucleus | The cells control centre | | A | Cell membrane | Allows for flow of particles from high-to-low concentration of substances in and out of the cell | | P | Central vacuole | Picks up waste | | F | Chloroplasts | Organelle that takes sunlight to produce ATP (chemical energy) in the process known as photosynthesis | ## Name: 2. Use the diagram below to answer the following questions. (14 marks total) a. Label the stages/phases beside each number in the diagram above (4 marks). | 1 | 2 | 3 | 4 | | :----------------- | :------------- | :---- | :---- | | PMAT | G1 | G2 | S | b. In this table, state the phase/stage/process number from part (a) (i.e. 1, 2, 3, or 4) that can be broken down into smaller phases, and name in order, and briefly describe one (1) thing occurs in each phase/step (10 marks): | Number | Phase/Step | Steps and Brief Descriptions | | :------ | :------------------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | 1 | Prophase | Spindle fibers are forming | | | Metaphase | The chromosomes are lined up in the middle | | | Anaphase | The sister chromosomes pull apart to opposite ends of the cell | | | Telophase | Two new nuclei form around the separated chromosomes | | 2 | G1 | The cell grows and carries out normal activities | | 3 | G2 | The cell grows and makes more organelles to prepare for cell division | | 4 | S | The DNA replicates, or makes a copy of itself, so that each new daughter cell will have a complete set of chromosomes | ## 4. Explain the importance of surface area:volume ratio within biological systems. State 2 examples that are affected by surface area:volume ratio. (4 marks) **Large cells** have a **smaller surface area to volume ratio**. This makes it harder for nutrients to enter the cell and waste to exit the cell. **Small cells** have a **larger surface area to volume ratio**. This makes it easier for nutrients to enter the cell and waste to exit the cell.  ## BONUS (2 marks) Describe how plants sexually reproduce to produce new plants. The female part of the flower, the pistil, contains the ovary which produces eggs. The male part of the flower, the stamen, produces pollen which contain sperm. When pollen from the stamen lands on the stigma of the pistil, fertilization occurs and a seed is formed.