IGCSE Biology Paper-2: Specimen Questions with Answers 1 - 3 of 103

Question number: 1

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Question

What do you mean by DNA sequencing?

Choices

Choice (4) Response

a.

Technique, which is used to determine the base sequence in a DNA molecule

b.

Technique, which is used to determine the Phosphate sequence in a DNA molecule

c.

Technique, which is used to determine the sugar sequence in a DNA molecule

d.

Question does not provide sufficient data or is vague

Answer

a.

Explanation

DNA sequencing is the process of determining the precise order of nucleotides within a DNA molecule. It includes the technology that is used to determine the order of the four bases—adenine, guanine, cytosine, and thymine—in a strand of DNA.

Question number: 2

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Question

Diagram shows an influenza virus. Label the part A, B, and C in given picture

Figure shows an influenza virus

Figure Shows an Influenza Virus

Above figure shows the structure of influenza virus

Choices

Choice (4) Response

a.

A-Protein Coat, B-Tail, C-Membrane envelope

b.

A- Fiber, B- RNA, C-Nucleic acid

c.

A-Nucleic Acid, B-RNA, C-Protein Coat

d.

A- membrane envelope, B-Protein Coat, C- RNA

Answer

d.

Explanation

The genome of influenza A and B viruses consists of single stranded RNA of negative sense. Influenza virus are a small number of M2

Protein molecules, which function as ion channels and protein coat surrounded the nucleic acid

Passage

The diagram shows two solutions of strong glucose and weak glucose solution, which are separated by a partially permeable membrane. This membrane will allow the transfer of water molecules not glucose molecules.

Picture shows two different glucose solutions

Picture Shows Two Different Glucose Solutions

diagram shows two solutions of strong glucose solution and weak glucose solution, which are separated by a partially permeable membrane.

Question number: 3 (1 of 2 Based on Passage) Show Passage

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Question

The diagram shows two solutions of strong glucose and weak glucose solution, which are separated by a partially permeable membrane. This membrane will allow the transfer of water molecules not glucose molecules. As a result?

Choices

Choice (4) Response

a.

No change will occur in both solutions

b.

Water can move from the left to right

c.

Water can move from the right to the left

d.

From left to right against their concentration gradient

Answer

c.

Explanation

The diagram shows two glucose solutions of strong glucose and weak glucose solution, which are separated by a partially permeable membrane. This membrane will allow the transfer of water molecules not glucose molecules. As a result water can move from the right, where there is high concentration of water molecules is present, to the left, where water concentration is low.