O level Results Out

Photosynthesis

Home » Latest » Photosynthesis

Photosynthesis

A green plant. Image credit nipunscorp.com

A green plant. Image credit nipunscorp.com

ZIMSEC O Level Integrated Science: Photosynthesis

  • Green plants are the food and oxygen producers of the living world.
  • They manufacture organic molecules from inorganic raw materials.
  • Animals rely on green plants to make food that provides them with energy and oxygen.
  • Green plants are thus known as producers and animals are in turn known as consumers.
  • Only green plants can make food.
  • The process by which green plants make food from inorganic materials is known as photosynthesis.
  • Photosynthesis- is the process by which green plants use light energy to combine carbon dioxide and water into carbohydrates and releasing oxygen as a by product.
  • The word equation for photosynthesis is:
Carbon Dioxide+Water\xrightarrow[light]{chlorophyll}Carbohydrates+Oxygen
  • There are two types of carbohydrates made during the process of photosynthesis:
  • sugars and starch.
  • Testing for either of these molecules in plants will show whether plants are making food.
  • Most plants produce although others like cereals (e.g. maize) produce sugars first.
  • The simple sugar compound (glucose) is converted into starch for storage in the leaves.
  • Chlorophyll is the green pigment found in plants.
  • It is commonly found in plant leaves.
  • It absorbs light energy from the sun and converts it into chemical energy.
  • It absorbs light energy from the usn which can then be used to manufacture food.
  • To access more topics go to the Integrated Science Notes page.

    Advertisements
    By | 2017-01-17T11:18:26+00:00 August 9th, 2015|Notes, O Level Science Notes, Ordinary Level Notes|20 Comments

    About the Author:

    He holds an Honours in Accountancy degree from the University of Zimbabwe. He is passionate about technology and its practical application in today's world.

    20 Comments

    1. partmoredhliwayo September 1, 2015 at 10:32 pm - Reply

      Comment…helpful notes thank y
      ou so much

    2. Mutsa December 29, 2015 at 12:58 pm - Reply

      Keep up the good work. Zimbabwe needs people like you

    3. B.Chaora January 13, 2016 at 7:36 pm - Reply

      Comment…thank u so much mukoma u have really helped me keep up th good work

      • tanyaradzwa February 22, 2016 at 5:46 pm - Reply

        yes it was helpful

    4. mubariri January 14, 2016 at 6:56 pm - Reply

      can you correct the word equation for photosynthesis,
      the by-product is oxygen not water

      • Garikai Dzoma January 24, 2016 at 7:26 am - Reply

        Thank you we have made the correction. Please feel free to tell us of any errors you come across in the future.

    5. mudenda January 15, 2016 at 4:11 pm - Reply

      very gud and helpful information …………….can i have the information posted to me if possible

    6. Blessing January 17, 2016 at 8:22 pm - Reply

      Comment…wonderful, thank you for the great work

    7. fanuel admire January 21, 2016 at 11:38 am - Reply

      I like the rise and practice put in technology standards ………… thanks good work.

    8. pat January 26, 2016 at 3:41 pm - Reply

      may God bless u Dzoma u dont know how u are changing lives

    9. Sibanda Methuseli February 5, 2016 at 1:19 am - Reply

      Comment…Thats a wow!! Thnks a lot the notes ae jus clear & straight 4wrd keep t up!

    10. tanyaradzwa February 22, 2016 at 5:52 pm - Reply

      l also learned a lot

    11. strive chanakira April 6, 2016 at 5:03 pm - Reply

      keep up the good work MAY
      GOD BLESS YOU

    12. Bighton Chinembiri May 16, 2016 at 11:31 pm - Reply

      wish you came during our school days, was just checking stuff for my little sis and bumped into this, welld etailed and on point, do whatu gotta do to keep doing this coz you really changi lives…. we learnt the hardway, but this thing you doing,,,, its priceless

      • Garikai Dzoma May 17, 2016 at 3:14 am - Reply

        Lol. I went to school before the Google days and know exactly what you mean.

    13. Bighton Chinembiri May 16, 2016 at 11:33 pm - Reply

      wish you came during our school days, was just checking stuff for my little sis and bumped into this, well detailed and on point, do whatu gotta do to keep doing this coz you really changin lives…. we learnt the hardway, but this thing you doing,,,, its priceless

    14. Joel mambinge May 23, 2016 at 8:50 pm - Reply

      This thing is so helpful can’t imagine that all the topics were are doing at school are all here

    15. Celine January 17, 2017 at 11:13 am - Reply

      Thank you so much,this is absolutely amazing.keep up the great job .

    16. Gugulethu Makoni April 27, 2017 at 5:03 pm - Reply

      Thank you very much sir lm writing my o level this year n l found these notes very easy to study

    17. chenge May 11, 2017 at 9:04 am - Reply

      thank u so much so helpful and clear. Keep on doing good work

    Leave A Comment

    sixteen + seventeen =