biology questions =0

Please answer those questions in English THANKS

1 Explain the job of the stroma

2 Explain the job of the thylakoid

3 Explain water movement( Where is it more concentrated and why) including the words osmosis and transpiration

also, i need a diagram of the chloroplast and its parts (you can just give me the website)

please give me the answers ASAP

THANKS

5 個解答

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  • 1 0 年前
    最佳解答

    Stroma: The connective tissue framework of an organ, a gland, or other structure, as distinguished from the tissues performing the special function of the organ or part. The spongy and colorless framework of a cell.

    Thylakoids (commonly referred to as Thylakoid membranes) are a phospholipid bilayer membrane-bound compartment internal to chloroplasts, and represent the majority of its internal structure. The word "thylakoid" is derived from the Greek thylakos, meaning "sac". Thylakoid membranes fold on top of each other into stacks of disks referred to singularly as a granum and in the plural as "grana". "Grana" is Latin for "stacks of coins". The term "thylakoid" also refers to the intergrana or stroma thylakoid, which joins granum stacks together as a single functional compartment known as the lumen. Thylakoids contain many integral membrane proteins which play an important role in the light-dependent stage of photosynthesis due to their abundance in chlorophyll. Thylakoids also play a key role in light harvesting due to photosystems which harvest light at different wavelengths, utilising accessory pigments such as carotenoids and phycobiliproteins to harvest light at a greater spectrum of wavelengths.

    These make use of Electron transport chains that function to generate a chemiosmotic potential across the membrane and NADPH, a product of the terminal redox reaction. In addition, the ATP synthase enzymes use the chemi-osmotic potential to make ATP during photophosphorylation.

    Wather movement: 進去下面的網站然後點 "[Begin manual download]"

    http://www.plantphysiol.org/cgi/reprint/35/6/783

    Chloroplast:

    圖片參考:http://upload.wikimedia.org/wikipedia/commons/1/11...

    參考資料: 自己
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  • 匿名使用者
    6 年前

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  • Hi^_^~
    Lv 4
    1 0 年前
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  • 1 0 年前

    yeah i know

    but the problem is i don't have one

    cuz we use bio text book during the class

    we can't take it home

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  • 1 0 年前

    all these should be in the entry level bio text book.

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