AQA As-Level Biology Paper 1 Predicted Paper 2023 QUESTIONS AN ANSWERS

AQA

AS-Level Biology 

Paper 1

Predicted Paper 2023

Name ……………………………………………………………………

Date …………………

1 hour 30 minutes allowed.

You may use a scientific calculator and a ruler with millimetre measurements.

Grade boundaries

These are VERY rough guesses! Getting a B on this paper does not guarantee you the same mark in the exam.

• A 60%

• B 50%

• C 40%

• D 35%

• E 30%

The diagram below shows a molecule of glucose.

a) What disaccharide would two molecules of this monosaccharide form when joined together?

[1 mark]

b) Name the bond that forms between two monosaccharides?

[1 mark]

c) Describe how this bond is formed.

[2 marks]

d) These monosaccharides can join to make the polysaccharide amylopectin. Name and explain one feature that makes amylopectin a good storage molecule.

[2 marks]

The diagram below shows a micrograph of an E. coli bacterium taken using an electron microscope. The length of the bacterium is 8µm.

a) Calculate the magnification of the microscope used to take the image.

[2 marks]

Magnification =

b) What type of electron microscope was used to obtain the image shown in the diagram above?

Give one piece of evidence to support your answer.

[2 marks] Type of microscope: Evidence: