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What enzymes are used in the process of DNA replication and what are they used for?

The two enzymes used in DNA replication are DNA helicase and DNA polymerase.The DNA helicase is used to break the hydrogen bonds between the two DNA strands so that the strands can unzip. After fre...

Answered by Seraphima G. • Biology tutor

2827 Views

Describe how someone with breast cancer could go on to develop lung cancer (3 marks)

If the cancer is malignant, then the cancerous cells could spread via the bloodstream to the lung where a secondary tumor could develop. Lifestyle choices such as smoking that caused the breast cancer cou...

Answered by George K. • Biology tutor

2363 Views

Describe the process of Eutrophication?

Eutrophication occurs when heavy rains cause fertalizers from farmland to flow into rivers or lakes. These fertalizers lead to a reduction to the limiting factors of algal growth by providing phosphate an...

Answered by Jack G. • Biology tutor

2594 Views

Glycogen and amylose are used for energy storage. Glycogen is found in animals. Amylose is found in plants. Describe how the structure of glycogen allows it to perform its function and explain the advantage to animals of using glycogen as an energy

First of all I'd realise that the questions is asking you to make a comparison between glycogen and amylose and their suitability, so would advise the candidate to make two separate bullet point lists for...

Answered by Laura G. • Biology tutor

15305 Views

Describe the Benedict's test for reducing sugars and how this can be modified to test for non-reducing sugars

Take 1-2cm³ of the sample in a test tubeAdd a few drops of Benedict's reagent to the test tube Heat the test tube in a water bath Leave for 5 minutes Observe the colour of the precipitate forme...

Answered by Jennifer P. • Biology tutor

8417 Views