Pearson Edexcel IGCSE · Biology

Cloning: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Cloning.

10 questions23 marksFree, no account

Question 1

1 mark

What is a characteristic of plants produced through the process of micropropagation?

Question 2

1 mark

During the process of micropropagation, explants are grown in a nutrient medium. Why is it essential that this medium contains magnesium ions?

Question 3

1 mark

The diagram illustrates the stages involved in cloning a mammal, such as Dolly the sheep. Which of the following steps is necessary to ensure the offspring is genetically identical to the donor animal?

Question 4

1 mark

In the process of micropropagation, small pieces of plant tissue are grown in vitro to produce commercial quantities of plants. What is the correct term for these pieces of tissue?

Question 5

1 mark

In the production of cloned mammals, a diploid nucleus is inserted into an enucleated egg cell. What is the biological reason for using a diploid nucleus rather than a haploid one?

Question 6

2 marks

Why is it essential that the nutrient medium used in micropropagation is kept sterile?

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Question 7

3 marks

What is the function of a surrogate mother in the process of cloning a mammal like Dolly the sheep?

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Question 8

5 marks

During the cloning of a mammal, why is a small electric shock applied to the egg cell after the donor nucleus has been introduced?

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Question 9

4 marks

Micropropagation is a technique used to produce large numbers of plants.
a) Define the term explant.
b) State two conditions that must be maintained in the agar medium to ensure successful growth of the explants.

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Question 10

4 marks

The production of cloned mammals involves complex cellular manipulations.
a) Explain the difference between a haploid egg cell and the diploid nucleus used in cloning.
b) Describe the role of a surrogate mother in the process of cloning a mammal like Dolly the sheep.

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