9700/13 Biology Oct Nov 2019 Online Test | Cambridge AS and A Level MCQ
Cambridge
AS & A Level
Biology (9700)
بهمن
2019
مشاهده نمونه سوال
شامل مباحث:
AS Level
تعداد سوالات: 40
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
60 دقیقه
پیش نمایش صفحه اول فایل
The diagram shows a protein molecule.
Two long polypeptides each form α-helices for much of their length and these twist together into a
fibre.
At one end, each of these polypeptides coils into a globular head.
Two short polypeptides bind to each globular head.
What describes the protein structure of this molecule?