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A2 Biology Essays

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A-Level Biology


Question: Give an account of how poor diet and obesity can increase the chance of a person
developing coronary heart disease (CHD).

As biology, A grade, 38/40

Answer: Malnutrition is not limited to 3rd world countries, anyone who has a...


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Question: The Effects of Exercise on the Blood Pressure and Heart Rate of Smokers and Non-Smokers

Answer: Aim: I am going to investigate how aerobic exercise affects the heart...


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Question: Maintaining cultures of pathogenic micro organisms in public health laboratories is a risk worth taking. Do you agree or disagree?

Answer: The process of maintaining pathogenic cultures has conjured up a variety of...


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Question: How did the human species evolve?

Answer: The most logical and widely accepted scientific theory on human evolution today...


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Question: The importance of water to biological systems.

Answer: Water is essential to life itself, with out water life on earth...


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Question: What functions do the Kidney’s carry out?

Answer: The kidneys are central to homeostatic regulation. They excrete soluble waste, help...


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Question: The Effect of pH on the Rate of Catalase

Answer: Catalase is an enzyme. All enzymes are proteins, made up of a...


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Question: Give an account of the ways in which molecules and ions move into and out of cells.

Answer: One way molecules and ions move into a out of cells is...


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Question: Protein Haemoglobin

Answer: Haemoglobin is a water soluble globular protein that is similar to other...


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Question: The Central Dogma of Molecular Biology

Answer: DNA central dogma illustrates the flow of genetic information of “DNA to...


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  • Subject: Biology
  • Course: Biology
  • Level: A-Level
  • Year: 1st
  • Mark: 94%
  • Words: 1764
  • Date submitted: April 11, 2013
  • Date written: March, 2010
  • References: No
  • Document type: Essay*
  • Essay ID: 4653
  • Subject: Biology
  • Course: Biology
  • Level: A-Level
  • Year: Not applicable
  • Mark: 66%
  • Words: 2169
  • Date submitted: March 16, 2009
  • Date written: Not available
  • References: Yes
  • Document type: Essay*
  • Essay ID: 999
  • Subject: Biology
  • Course: Biology
  • Level: A-Level
  • Year: Not applicable
  • Mark: 63%
  • Words: 797
  • Date submitted: March 13, 2009
  • Date written: Not available
  • References: Yes
  • Document type: Essay*
  • Essay ID: 987
  • Subject: Biology
  • Course: Biology
  • Level: A-Level
  • Year: Not applicable
  • Mark: 61%
  • Words: 3122
  • Date submitted: March 16, 2009
  • Date written: Not available
  • References: Yes
  • Document type: Essay*
  • Essay ID: 1001
  • Subject: Biology
  • Course: Biology
  • Level: A-Level
  • Year: Not applicable
  • Mark: 60%
  • Words: 1400
  • Date submitted: March 16, 2009
  • Date written: Not available
  • References: No
  • Document type: Essay*
  • Essay ID: 1005
  • Subject: Biology
  • Course: Biology
  • Level: A-Level
  • Year: Not applicable
  • Mark: 60%
  • Words: 1161
  • Date submitted: March 16, 2009
  • Date written: Not available
  • References: No
  • Document type: Essay*
  • Essay ID: 1002
  • Subject: Biology
  • Course: Biology
  • Level: A-Level
  • Year: Not applicable
  • Mark: 60%
  • Words: 1407
  • Date submitted: March 16, 2009
  • Date written: Not available
  • References: Yes
  • Document type: Essay*
  • Essay ID: 998
  • Subject: Biology
  • Course: Biology
  • Level: A-Level
  • Year: Not applicable
  • Mark: Not available
  • Words: 702
  • Date submitted: November 27, 2017
  • Date written: Not available
  • References: No
  • Document type: Essay*
  • Essay ID: 8194
  • Subject: Biology
  • Course: Biology
  • Level: A-Level
  • Year: Not applicable
  • Mark: Not available
  • Words: 725
  • Date submitted: February 26, 2016
  • Date written: January, 2015
  • References: No
  • Document type: Essay*
  • Essay ID: 7149
  • Subject: Biology
  • Course: Biology
  • Level: A-Level
  • Year: Not applicable
  • Mark: Not available
  • Words: 1996
  • Date submitted: February 26, 2016
  • Date written: January, 2015
  • References: Yes
  • Document type: Essay*
  • Essay ID: 7148
 
  1. I'm struggling with the essay title 'cycles in Biology' (25 marks) and was wondering if anyone has an example of this?

    I know what I'm going to include in each of the paragraphs but I don't understand how to write it. I know it's all about breadth and not depth, which is where I'm struggling as I can't seem to stop writing in detail!

    If someone has done this essay title or another similar, do you mind posting it so I can get an idea of how to write it/how much to write?

    THANK YOUUU!

    Also, this is my first attempt at writing one.

  2. Hey, I have completed this essay and achieved 24/25 marks (I lost one mark due to grammar)

    My advice would be to structure a paragraph as a 5 mark question of the topic.

    My usual structure is;
    Introduction (basic GCSE, A-level knowledge)
    Ecological cycles
    Clavin Cycle
    Krebs Cycle
    Nitrogen Cycle
    Carbon/Phosphorous Cycle
    (You need 5 topics at least to get into the top mark band)
    + additional further reading for instance metamorphosis.

    In each paragraph I would use the structure;
    Name the cycle e.g. calvin cycle, explain where it occurs and why it occurs and then describe the processes involved and then link back to the essay title and why it is a cycle.

  3. Thank you this is very useful! My teacher said to write about 16 different topics. So I have 4 cycles for Biochemical, cellular, systems and ecosystems. I can write about each briefly but as a whole the essay ends up being about 4 or 5 pages, which I think is too much for this?
    (Original post by KingAuthor)
    Hey, I have completed this essay and achieved 24/25 marks (I lost one mark due to grammar)

    My advice would be to structure a paragraph as a 5 mark question of the topic.

    My usual structure is;
    Introduction (basic GCSE, A-level knowledge)
    Ecological cycles
    Clavin Cycle
    Krebs Cycle
    Nitrogen Cycle
    Carbon/Phosphorous Cycle
    (You need 5 topics at least to get into the top mark band)
    + additional further reading for instance metamorphosis.

    In each paragraph I would use the structure;
    Name the cycle e.g. calvin cycle, explain where it occurs and why it occurs and then describe the processes involved and then link back to the essay title and why it is a cycle.

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