cell matatag .pptx

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1. Exploring the Microscopic World of Cells

2. Exploring the Microscopic World of Cells CONTENT Familiarity and proper use of a compound microscope are essential to observe cells. LEARNING STANDARD Use proper techniques in observing and identifying the parts of a cell with a microscope such as the cell membrane, nucleus, cytoplasm, mitochondria, chloroplasts, and ribosomes; LEARNING COMPETENCY

3. By the end of the lesson, the 80 percent of the learners will be able to: I dentify and describe the major organelles of a plant or animal cell, including the cell membrane, nucleus, cytoplasm, mitochondria, chloroplasts, and ribosomes. Demonstrate proper microscope handling and slide preparation techniques. Appreciate the complexity and diversity of cellular structures by answering the reflection of learning. OBJECTIVES

4. I. Activating Prior Knowledge Short Review Complete the words below by filling in the missing letters. I. Activating Prior Knowledge _UCL_US It controls all the activities of the cell .

5. I. Activating Prior Knowledge Short Review Complete the words below by filling in the missing letters. I. Activating Prior Knowledge CY_OPL_ _M It is where all the organelle is located.

6. I. Activating Prior Knowledge Short Review Complete the words below by filling in the missing letters. I. Activating Prior Knowledge V_CUOL_ It holds water, food and waste materials .

7. I. Activating Prior Knowledge Short Review Complete the words below by filling in the missing letters. I. Activating Prior Knowledge CH_ORO_LAS_ It is the site of photosynthesis in plant cells.

8. I. Activating Prior Knowledge Short Review Complete the words below by filling in the missing letters. I. Activating Prior Knowledge CELL WA_ _ It provides support, protection, and shape to the plant cell.

9. I. Activating Prior Knowledge Short Review Complete the words below by filling in the missing letters. I. Activating Prior Knowledge NUCLEUS It controls all the activities of the cell .

10. I. Activating Prior Knowledge Short Review Complete the words below by filling in the missing letters. I. Activating Prior Knowledge CYTOPLASM It is where all the organelle is located.

11. I. Activating Prior Knowledge Short Review Complete the words below by filling in the missing letters. I. Activating Prior Knowledge VACUOLE It holds water, food and waste materials .

12. I. Activating Prior Knowledge Short Review Complete the words below by filling in the missing letters. I. Activating Prior Knowledge CHLOROPLAST It is the site of photosynthesis in plant cells.

13. I. Activating Prior Knowledge Short Review Complete the words below by filling in the missing letters. I. Activating Prior Knowledge CELL WALL It provides support, protection, and shape to the plant cell.

14. Identify and describe the major organelles of a plant or animal cell, including the cell membrane, nucleus, cytoplasm, mitochondria, chloroplasts, and ribosomes. Demonstrate proper microscope handling and slide preparation techniques. Appreciate the complexity and diversity of cellular structures by answering the reflection of learning. B. Establishing Purpose of the Lesson 1. LESSON PURPOSE

15. B. Establishing Purpose of the Lesson 2. Unlocking Content Vocabulary: Match Type Activity Prokaryotes Eukaryote Nucleus C. Single-celled organisms that lack a true nucleus and membrane-bound organelles. Examples include bacteria and archaea. B. A type of cell that has a true nucleus and membrane-bound organelles. D. The membrane-bound organelle in eukaryotic cells that contains the genetic material and directs the cell's activities. Cells The basic unit of structure and function in living organisms.

16. B. Establishing Purpose of the Lesson 2. Unlocking Content Vocabulary: Match Type Activity Prokaryotes Eukaryote Nucleus C. Single-celled organisms that lack a true nucleus and membrane-bound organelles. Examples include bacteria and archaea. B. A type of cell that has a true nucleus and membrane-bound organelles. D. The membrane-bound organelle in eukaryotic cells that contains the genetic material and directs the cell's activities. Cells The basic unit of structure and function in living organisms.

17. C. Developing and Deepening Understanding Organelles, their description, function, and classification. Organelle Description Function Animal, Plant or Both 1. CELL WALL Rigid, tough, made of cellulose Protects and supports the cell Plant

18. C. Developing and Deepening Understanding Organelles, their description, function, and classification. Organelle Description Function Animal, Plant or Both 2. CYTOPLASM Jelly like substance that contains organelles Pads and supports organelles inside the cell. Both

19. C. Developing and Deepening Understanding Organelles, their description, function, and classification. Organelle Description Function Animal, Plant or Both 3. NUCLEUS Dense, ball shaped structure, contains DNA Controls all of the cell’s activities Both

20. C. Developing and Deepening Understanding Organelles, their description, function, and classification. Organelle Description Function Animal, Plant or Both 4. ENDOPLASMIC RETICULUM Clear, tubular system of tunnels throughout the cell Transports materials like proteins around the cell Both

21. C. Developing and Deepening Understanding Organelles, their description, function, and classification. Organelle Description Function Animal, Plant or Both 5. RIBOSOME Small specks made of RNA. Found in cytoplasm or on the endoplasmic reticulum Makes proteins Both

22. C. Developing and Deepening Understanding Organelles, their description, function, and classification. Organelle Description Function Animal, Plant or Both 6. MITOCHONDRIA Location in the cytoplasm, bean shaped. Supplies energy or ATP for the cell through cell respiration using glucose and oxygen. Both

23. C. Developing and Deepening Understanding Organelles, their description, function, and classification. Organelle Description Function Animal, Plant or Both 7. VACUOLE Large open storage area, smaller in animal cells Storage tank for food, water, wastes or enzymes Both

24. C. Developing and Deepening Understanding Organelles, their description, function, and classification. Organelle Description Function Animal, Plant or Both 8. CHLORO PLAST Green structures that contain chlorophyll. Captures sunlight and uses it to produce food through photosynthesis. Plant

25. C. Developing and Deepening Understanding Organelles, their description, function, and classification. Organelle Description Function Animal, Plant or Both 9. GOLGI BODY Small bags with tubes connecting them. Packages and secrets proteins for use in and out of the cell. Both

26. C. Developing and Deepening Understanding C. Developing and Deepening Understanding 1. Carrying the Microscope Grasp the microscope by the arm or base, not the eyepiece. Hold the microscope close to your body for stability. Avoid swinging or jerking the microscope as you carry it. Set the microscope down gently on a stable, level surface. Demonstrating Microscope Handling:

27. C. Developing and Deepening Understanding C. Developing and Deepening Understanding 2. Adjusting the Microscope Start with the lowest power objective lens (e.g., 4x or 10x). Use the coarse adjustment knob to quickly bring the stage into focus. Switch to the fine adjustment knob to refine the focus. Rotate the nosepiece to change objective lenses, being careful not to hit the slide. Adjust the interpupillary distance of the eyepieces to match your eyes. Demonstrating Microscope Handling:

28. C. Developing and Deepening Understanding C. Developing and Deepening Understanding 3. Focusing the Microscope Place the prepared slide on the stage and secure it with the stage clips. Start with the lowest power objective and bring the specimen into view. Use the coarse adjustment knob to get a rough focus. Switch to the fine adjustment knob to sharpen the image. Make small, incremental turns of the fine adjustment until the specimen is in clear focus. Demonstrating Microscope Handling:

29. C. Developing and Deepening Understanding Worked Example Picture Analysis: Plant and Animal Cells. The students collaboratively List down the difference between plant and animal cells.

30. C. Developing and Deepening Understanding Lesson Activity Laboratory Activity on the Observing Plant and Animal Cell: The students will perform the laboratory activity to view plant and animal cells using the microscope. Objectives: To prepare and observe slides of plant and animal cells. To identify the differences and similarities between plant and animal cells. To understand the basic cell structures.

31. C. Developing and Deepening Understanding Lesson Activity Laboratory Activity on the Observing Plant and Animal Cell: Materials: Microscopes Prepared slides of plant cells (onion epidermis) and animal cells (cheek cells) Glass slides Coverslips Iodine solution (for plant cells staining) Methylene blue solution (for animal cell staining) Toothpicks Dropper Tweezers Paper towels

32. C. Developing and Deepening Understanding Lesson Activity Laboratory Activity on the Observing Plant and Animal Cell: Procedure: Preparing Plant Cell (Onion Epidermis) Peel a thin layer of epidermis from the inner side of an onion using tweezers. Place the onion epidermis flat on a glass slide. Add a drop of iodine solution to the onion epidermis. Carefully place a coverslip over the specimen to avoid air bubbles. Use a paper towel to draw the stain under the coverslip if necessary. Observe the slide under the microscope, starting with the lowest magnification and moving to higher magnifications. Draw the observed structures and label the cell wall, cell membrane, nucleus, and cytoplasm.

33. C. Developing and Deepening Understanding Lesson Activity Laboratory Activity on the Observing Plant and Animal Cell: Procedure: B. Preparing Animal Cell (Cheek Cells) Gently scrape the inside of your cheek with a clean toothpick. Smear the collected cells onto a blank microscope slide. Add a drop of methylene blue solution to the cells to spread them thinly on the slide. Carefully place a coverslip over the specimen. Use a paper towel to draw the stain under the coverslip if necessary. Observe the slide under the microscope, starting with the lowest magnification and moving to higher magnifications. Draw the observed structures and label the cell membrane, nucleus, and cytoplasm.

34. C. Developing and Deepening Understanding Lesson Activity Laboratory Activity on the Observing Plant and Animal Cell: Discussion Questions: 1. What are the main structural differences between plant and animal cells observed under the microscope? 2. Why do plant cells have a cell wall, and what is its function? 3. What is the purpose of staining the cells with iodine solution and methylene blue? 4. How does the shape of the cells differ between plant and animal cells, and why? 5. What similarities did you observe between plant and animal cells?

35. C. Developing and Deepening Understanding Lesson Activity Venn Diagram: Students will use a Venn Diagram to differentiate plant and animal cells .

36. D. MAKING GENERALIZATION Reflection on Learning One Minute Paper: Using the graphic organizer, reflect on your learning by creating a one-minute paper by answering the questions.

37. E. EVALUATING LEARNING E. EVALUATING LEARNING E. EVALUATING LEARNING _________ 1. Which of the following is the control center of the cell? Cytoplasm Nucleus Cell membrane Mitochondria

38. E. EVALUATING LEARNING E. EVALUATING LEARNING E. EVALUATING LEARNING _________ 2. The organelle responsible for energy production in the cell is the: Chloroplast Ribosome Mitochondria Endoplasmic reticulum

39. E. EVALUATING LEARNING E. EVALUATING LEARNING E. EVALUATING LEARNING _________ 3. Which of these structures is found in both plant and animal cells? Cell wall Chloroplast Nucleus All of the above

40. E. EVALUATING LEARNING E. EVALUATING LEARNING E. EVALUATING LEARNING _________ 4. The thin, selective barrier that controls what enters and leaves the cell is the: Cell wall Cell membrane Cytoplasm Nucleus

41. E. EVALUATING LEARNING E. EVALUATING LEARNING E. EVALUATING LEARNING _________ 5. Structures that translate genetic information into proteins are called: a. Mitochondria b. Ribosomes c. Chloroplasts d. Endoplasmic reticulum

42. E. EVALUATING LEARNING E. EVALUATING LEARNING E. EVALUATING LEARNING _________ 6. Which organelle is responsible for photosynthesis in plant cells? Nucleus Chloroplast Mitochondria Endoplasmic reticulum

43. E. EVALUATING LEARNING E. EVALUATING LEARNING E. EVALUATING LEARNING _________ 7. The jelly-like substance that fills the cell and supports its structures is called: Cell wall Cell membrane Cytoplasm Nucleus

44. E. EVALUATING LEARNING E. EVALUATING LEARNING E. EVALUATING LEARNING _________ 8. Which of the following is the correct order for focusing a microscope? Coarse adjustment, fine adjustment, low power objective Low power objective, coarse adjustment, fine adjustment Fine adjustment, coarse adjustment, low power objective Low power objective, fine adjustment, coarse adjustment

45. E. EVALUATING LEARNING E. EVALUATING LEARNING E. EVALUATING LEARNING _________ 9. When preparing a wet mount slide, the purpose of the coverslip is to: Hold the specimen in place Provide additional magnification Prevent air bubbles from forming All of the above

46. E. EVALUATING LEARNING E. EVALUATING LEARNING E. EVALUATING LEARNING _________ 10. Which of these is an important step in caring for a microscope? Cleaning the lenses with water Storing the microscope in direct sunlight Gently wiping the lenses with a tissue Touching the lenses with your fingers

47. E. EVALUATING LEARNING E. EVALUATING LEARNING E. EVALUATING LEARNING Answer Key: b. Nucleus c. Mitochondria d. All of the above b. Cell membrane b. Ribosomes b. Chloroplast c. Cytoplasm b. Low power objective, coarse adjustment, fine adjustment d. All of the above c. Gently wiping the lenses with a tissue

48. Reference : SCIENCE 7 LESSON EXEMPLAR Textbooks:ience education websites (e.g., Khan Academy, Exploratorium, PBS Learning Media) Microscope manufacturer websites (e.g., Leica, Nikon, Olympus) University biology "Biology" by Campbell and Reece "Principles of Anatomy and Physiology" by Tortora and Derrickson "Molecular Biology of the Cell" by Alberts et al. Scientific Journals: "The American Biology Teacher" "Journal of Biological Education" "CBE—Life Sciences Education" Online Resources: Sc department websites and course materials