• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

The role of ATP in cells

Extracts from this document...


´╗┐The role of ATP ATP ? adenosine triphosphate ? provides an immediate source of energy for all cells in every living organism. The diagram shows that one ATP molecule is made up of an organic base (adenosine) which is attached to a pentose sugar known as ?ribose?. This sugar is then attached to three phosphate groups. A lot of energy is stored in the ATP molecule and this energy is generated by the repulsion between the phosphate group and the negatively charged oxygen atoms which are bonded to each other. ...read more.


Although some of this energy is lost as heat, most of it is used by cells in their various biochemical processes. ATP is a more reliable source of energy as it is constantly being resynthesized; it is also a quicker process because only one bond needs to be broken to release energy which is unlike molecules such as glucose. Methods of synthesizing ATP Energy can become available inside cells to aid the synthesis of ATP by two methods: Chemical potential energy can be transferred from glucose molecules to ATP molecules. This happens in a process known as glycolysis in the Krebs cycle stages of respiration. ...read more.


Synthesis of large molecules such as proteins or nucleic acids. Used to produce glucose in the light-independent stage of photosynthesis. The chemiosmotic theory of ATP production The main site of ATP synthesis is in the mitochondrion. The main reactions of respiration in the Krebs cycle takes place in the matrix while the electron transfer chain reactions (light-dependent stage) and ATP production occurs on the inner membrane of the mitochondria. The inner membrane of the mitochondria is impermeable to protons so in order for the protons to go back into the matrix, they have to go through special pores in the stalked particles where the electron transfer chain is found. This movement of protons along their electrical concentration and PH gradients drives the synthesis of ATP. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Molecules & Cells section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Molecules & Cells essays

  1. Marked by a teacher

    Investigating respiration of maggots

    5 star(s)

    The diagram below shows the Link reaction and the Krebs cycle. It is in the final stage of respiration that the bulk of ATP is produced, and it is this stage which requires oxygen. It is in this stage that the hydrogen atoms being carried by the reduced NAD and

  2. The Origin of the Mitochondrion.

    could ferment glucose to two- and three-carbon end products without the use of oxygen. In order to survive, the organism must have been able to cope with the growing level of atmospheric oxygen of the time (Margulis 1981). One problem with suggesting a prokaryotic host, however, is that no currently

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work