Transport in Plants Quiz (3) Biology AS Level
Cambridge
AS & A Level
Biology (9700)
فروردین
2010
شامل مباحث:
UNIT 7: Transport in plants
تعداد سوالات: 20
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
25 دقیقه
پیش نمایش صفحه اول فایل
omer uner Sucrose is loaded into phloem sieve tubes from companion cells.
What is the correct order of statements that explains this mechanism?
1- Hydrogen ions diffuse into companion cells through co-transporter proteins.
2- Hydrogen ions are pumped out of companion cells by active transport.
3- Sucrose diffuses into phloem sieve tubes via plasmodesmata.
4- Sucrose is co-transported along with hydrogen ions.
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