Cell Structure and Functions Part 3



Good morning boys!
In the last class you learnt that-
-A cell has three main parts -cell membrane ( an additional cell wall in plant cells) cytoplasm and nucleus.
-Cell organelles are present in the cytoplasm.
-The nucleus is the control centre of the cell .
-Chromosomes present in the nucleus are hereditary vehicles.

Today, we all will be learning more about cell organelles present in the cytoplasm and their functions.

 LEARNING OUTCOMES
By the end of the lesson, learner will be able to-

 -name the cell organelles and state their functions.
-distinguish between plant and animal cells.
-name the three kinds of plastids and state their functions.

 Important Instructions:
1. Write ups highlighted in RED should be copied in the science note book.
2. Diagrams should be drawn and well labelled.
3. Youtube links are provided for better understanding.

The different cell organelles and their functions are -
1. MITOCHONDRIA ( Power house of the cell )- produces energy from the food during respiration.
2. ENDOPLASMIC RETICULUM- helps to transport substances in the cell.
3. RIBOSOMES-  help in protein synthesis.

4. GOLGI BODIES - synthesise ,store and secrete many substances.
5. VACUOLES- are sac like structures  that store soluble food,wastes and secretions of the cell dissolved in water as cell sap.


6. LYSOSOMES ( suicidal bags ) - help in cellular digestion.( only in animal cells)
7. CENTROSOMES - play a role in the reproduction of cells ( only in animal cells )
8. PLASTIDS - are only present in plant cells.


https://www.bing.com/videos/search?


THERE ARE THREE TYPES OF PLASTIDS IN PLANTS-

(i) Chloroplast- These are green due to presence of chlorophyll. These help in synthesis of food by the process of photosynthesis.

 (ii) Chromoplasts- These are coloured (e.g. red, yellow, blue) plastids. These are responsible for the colour of flowers (eg. rose, marigold, petunia), fruits (eg. carrot, beet root, tomatoes) and leaves (eg. carotan).

 (iii) Leucoplasts- These are colourless plastids. Leucoplasts help in the storage of food.

https://www.bing.com/videos/search?


HOMEWORK

1. Read pages 131 and 132
2. Do question A ( very short-answer questions ) on page 134 in the reader itself.
3. Do question B (write one word for the following ) on page 135 in the reader itself.
4. Do question C (fill in the blanks type questions) on page 136 in the reader itself.
5. Do question C(long answer type questions) on Page 134 Q No 1,2,3.

Sustainable Development Goals (SDG) - LIFE UNDER WATER AND LIFE ON LAND

 REFLECT....(Intro aspect)
What activities of humans are adversely affecting life on earth and land?

Comments

  1. ManvendraApril 4, 2020 at 7:17 AM

    Good morning sir, Manvendra here.

    ReplyDelete
  2. Ayush jainApril 4, 2020 at 7:19 AM

    Good morning Sir I am Ayush Jain

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  3. Aryan PuriApril 4, 2020 at 7:20 AM

    Good Morning Sir,
    -Aryan Puri

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  4. Justin RussellApril 4, 2020 at 7:24 AM

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  5. Aditya SinghApril 4, 2020 at 7:25 AM

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    Aditya Singh

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  6. Pall anandApril 4, 2020 at 7:28 AM

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  7. ARSH NATH April 4, 2020 at 7:29 AM

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  8. MAULIKApril 4, 2020 at 7:29 AM

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  9. Falit MittalApril 4, 2020 at 7:29 AM

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  10. Aditya SagarApril 4, 2020 at 7:30 AM

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  11. Taksh SinghalApril 4, 2020 at 7:31 AM

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  12. Lovely SinghApril 4, 2020 at 7:31 AM

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  13. Aaryan SainiApril 4, 2020 at 7:32 AM

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    I am Aaryan Saini

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  14. Shaun steniApril 4, 2020 at 7:37 AM

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  15. Alan RoyApril 4, 2020 at 7:38 AM

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  16. N.RakaloApril 4, 2020 at 7:40 AM

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  17. J T MathewApril 4, 2020 at 7:42 AM

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    I am Jestin Thomas

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  18. ChristoApril 4, 2020 at 7:43 AM

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  19. Chetan chandelApril 4, 2020 at 7:44 AM

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    I am Lakshay chandel.

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  20. Alan RoyApril 4, 2020 at 7:44 AM

    Good morning sir I am Alan Roy

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  21. Samrath SinghApril 4, 2020 at 7:45 AM

    Good Morning Sir,
    I'm Samrath Singh

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  22. RemApril 4, 2020 at 7:46 AM

    Good morning sir I am Remthanglien Aomar Varte.

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  23. Keshav vermaApril 4, 2020 at 7:48 AM

    Good Morning sir,
    I am Keshav Verma

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  24. Rudra sethiApril 4, 2020 at 7:50 AM

    good morning sir I am Rudra Sethi

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  25. Aman ShekharApril 4, 2020 at 7:53 AM

    Good morning mam I am Aman Shekhar

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  26. AnonymousApril 4, 2020 at 7:54 AM

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  27. Vedant KumarApril 4, 2020 at 7:57 AM

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  28. Aaryan SainiApril 4, 2020 at 8:03 AM

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  29. Shreyansh AgarwalApril 4, 2020 at 8:03 AM

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  30. NavyeApril 4, 2020 at 8:09 AM

    Good Morning sir
    I am Navye Malhotra

    ReplyDelete
  31. Aaryan SainiApril 4, 2020 at 8:11 AM

    Sir,
    The HW you have given us is to be done in the book itself.
    But I think you are forgetting the fact that many of us (majority of students in 8E) don't even have our books yet. So please tell us a way by which we can complete our HW. You can either send pdf of the books as we can't find it on google.
    thanks (aaryan saini 8E)

    ReplyDelete
    Replies
    1. SCS SCIENCE ASHISHApril 4, 2020 at 8:15 AM

      I have send you the photo(images) of the book for easy reference. I can understand the situation that you all must be facing right now. The easy way out can be you do the work in your respective science copy. You all can refer to your book-reader as and when required.

      Delete
  32. UnknownApril 4, 2020 at 8:18 AM

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    I am Uday Singh.

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  33. Evaan DayalApril 4, 2020 at 8:38 AM

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  34. Cyril MartinApril 4, 2020 at 9:06 AM

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  35. Amit DanielApril 4, 2020 at 9:07 AM

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  42. Naman KalraApril 8, 2020 at 10:47 AM

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