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Grade 12 entrance exam 2005 E.C. (2013), papers by subject

Every paper from the 2005 E.C. Grade 12 university entrance exam that Temari holds, by stream: 6 papers in 6 subjects and 454 questions with the answer, 445 of them with a worked explanation.

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  • 6

    Papers

  • 6

    Subjects

  • 454

    Questions with answers

  • 445

    With a worked explanation

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Question 1

Grade 12 Biology entrance exam, 2005 E.C. (2013)

Which one of the following is the main constituent of biological membranes?

  1. A.Phospholipids
  2. B.Glycoproteins
  3. C.Glycolipids
  4. D.Cholesterol
Show the answer and explanation

Answer: A Phospholipids

Why

Every biological membrane is built as a double sheet of phospholipids. Each phospholipid has a water loving head and two water hating tails, so in water the molecules line up automatically with the tails facing inward and the heads facing out. That bilayer is the sheet itself, and everything else sits inside it. Cholesterol is tempting because animal membranes really do contain it, but it is a small amount tucked between the phospholipids to control how stiff the membrane is, not the material the membrane is made from.
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Questions students ask

Which subjects of the 2005 E.C. entrance exam are here?
The 2005 E.C. papers listed here cover these subjects (6): Biology, Chemistry, Civics, English, Mathematics, Physics. A subject that is not in the list is not in the collection for 2005 E.C. yet.
Do the 2005 E.C. papers come with answers?
Yes. All 454 questions on these papers carry the correct answer, and 445 of them have a worked explanation that shows how to reach it.
Can I download the 2005 E.C. entrance exam papers as PDF?
Yes, and it is free. 6 papers here have two files each: the question paper, and the answer key with its explanations. The buttons beside each paper download them, and no account is needed.
How do I practice the 2005 E.C. exam with a timer?
Create a free Temari account with a phone number. Each paper here then opens as a timed exam that is scored the moment you hand it in, with the explanation for every question.

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