9700/13 Biology May Jun 2013 Online Test | Cambridge AS and A Level MCQ
Cambridge
AS & A Level
Biology (9700)
شهریور
2013
مشاهده نمونه سوال
شامل مباحث:
AS Level
تعداد سوالات: 39
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
60 دقیقه
پیش نمایش صفحه اول فایل
Cell surface receptors used in cell signalling are usually proteins that extend from one side of the membrane to the other side of the membrane.
What is the role of the extracellular part of the protein?