Pearson Edexcel A Level · Biology A (Salters-Nuffield) (9BN0)

Eukaryotic and prokaryotic cell ultrastructure: Practice Questions

3 multiple-choice questions marked as you go, and 4 written questions with worked solutions. All on Eukaryotic and prokaryotic cell ultrastructure.

7 questions16 marksFree, no account

Question 1

1 mark

Which organelle is responsible for the modification and packaging of proteins into vesicles for transport to the cell surface membrane?

Question 2

1 mark

Epigenetic changes can modify gene activation. Which of the following is an example of an epigenetic modification?

Question 3

1 mark

What is meant by the term pluripotency in stem cell biology?

Question 4

2 marks

Explain the importance of the acrosome reaction in the process of mammalian fertilisation.

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Question 5

3 marks

Explain how DNA methylation can modify the activation of certain genes without altering the base sequence of the DNA.

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Question 6

2 marks

Distinguish between the terms pluripotency and totipotency in relation to stem cells.

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Question 7

6 marks

Topic 3: Voice of the Genome<\/b>
Stem cells have the potential to differentiate into various types of specialised cells.

(a) Distinguish between the terms pluripotency<\/i> and totipotency<\/i>.
(b) Describe how differential gene expression allows a stem cell to become a specialised muscle cell.
(c) Discuss one ethical issue associated with the use of embryonic stem cells in medical therapies.<\/p>

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