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1.2 What happens in cells (and what do cells need)?

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Question 70

Here are four key events in the synthesis, processing, and secretion of a glycoprotein in a eukaryotic cell:

  1. Transport vesicles containing the synthesized polypeptide bud off the rough endoplasmic reticulum.
  2. Secretory vesicles fuse with the plasma membrane to release the finished glycoprotein.
  3. Ribosomes dock on the rough endoplasmic reticulum to translate the mRNA into a polypeptide chain.
  4. The Golgi apparatus modifies the polypeptide by adding carbohydrate chains.

What is the correct chronological order of these events?

A

3→4→1→23 \rightarrow 4 \rightarrow 1 \rightarrow 23→4→1→2

B

1→3→4→21 \rightarrow 3 \rightarrow 4 \rightarrow 21→3→4→2

C

3→1→4→23 \rightarrow 1 \rightarrow 4 \rightarrow 23→1→4→2

D

3→1→2→43 \rightarrow 1 \rightarrow 2 \rightarrow 43→1→2→4

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1.2 What happens in cells (and what do cells need)? Questions

  1. GCSE
  2. /Biology
  3. /1.2 What happens in cells (and what do cells need)?

184 exam-style questions on OCR GCSE Biology 1.2 What happens in cells (and what do cells need)?, covering 1.2.1 Structure of DNA, 1.2.2 Nucleotides and complementary bases, 1.2.3 Protein synthesis, 1.2.4 DNA structure and the proteins made, 1.2.5 Investigating enzymatic reactions, and 1.2.6 Mechanism of enzyme action. Each one has a worked solution and a mark scheme showing where the marks go.

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