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

Cellular Respiration

Extracts from this document...


Cellular Respiration - Set of the metabolic reactions and processes that take place in organisms' cells to convert biochemical energy from nutrients into ATP, and then release waste products. - The reactions involved in respiration are catabolic reactions that involve the oxidation of one molecule and the reduction of another. - It is the preferred method of pyruvate breakdown from glycolysis and requires that pyruvate enter the mitochondrion in order to be fully oxidized by the Krebs cycle. - Respiration --> provide energy. Chemical reaction needs energy - Energy is needed for respiration - No energy cant make more energy - Exothermic use up energy - Energy is locked in phosphate. - ATP-P-P --> ATP-P (xP): breaks off and releases energy The overall reaction of glycolysis is: D-Glucose Pyruvate + 2 NAD+ + 2 ADP + 2 ...read more.


THE ATP MOLECULES - ATP forms when chemical reaction release sufficient energy to bond a third phosphate group to ADP - ATP-P-P --> ATP-P (xP): breaks off and releases energy - adp + Pi + energy = ATP - ATP stores energy for the cell and releases it when energy is needed - ATP is the energy currency of the cell - The reaction if reversible and is catalysed by the enzyme ATPase - more energy is needed at higher temperature - THE FIRST PHASE IS CLALED GLYCOLYSIS AND TAKES PLACE IN THE CELL CYTOPLASM - Splitting 6C sugar to 2 x 3C sugars - THE SECOND PHASE IS CLALED THE LINK REACTION AND TAKES PLACE WITHIN THE FLUID MATRIX OF THE MITOCHONDRION. ...read more.


Cant leave them hanging around -hydrogen is picked up by NAD (H2) -NAD takes hydrogen to where it can produce ATP -PGAL takes a hydrogen...NAD takes a hydrogen becomes NADH2 -release phosphate -ADP picks up phosphate and become ATP -release water and phosphate Overview of aerobic respiration -One molecule of glucose is oxidised to TWO molecules of PYRUVIC ACID -(PYRUVATE0 in a process called GLYCOLYSIS -GLYCOLYSIS occurs in the cytoplasm -each pyruvic acid molecule diffuses into the fluid matrix of the mictocondrion Two pyruvic acid molecules are converted into two molecules of ACETYL COENZYME A in the LINK REACTION - acetyl CoA molecules are needed to drive the krebs cycle - krebs cycle involves the successive oxidation of acids and generates pairs of hydrogen atoms, CO2 and some ATP in the process - hydrogen pairs are carried to the critae of the mictononcdrion - ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Biology 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 International Baccalaureate Biology essays

  1. Marked by a teacher

    The Roles of ATP

    3 star(s)

    ATP is the immediate source of energy for muscle contractions, but a muscle fibre only contains enough ATP for a few twitches, so the ATP needs to be replenished almost constantly, a muscle fibre different for ATP. In the muscle fibre there is about 10 times more phosphate creatine then

  2. 8.1 - Cell Respiration

    This type of ATP formation is different, as it occurs at substrate level. Four molecules of ATP are produced when two molecules of pyruvate are formed. Coupled with the loss of two ATP molecules in phosphorylation, the net gain of ATP in glycolysis is two.

  1. Cellular Respiration. Explain aerobic respiration including the link reaction, the Krebs cycle, NADH ...

    The next step is turning it into isocitrate. From there one CO2 molecule is lost and the compound is oxidized, giving its electrons in the form of H+ to NAD+ forming NADH+H+.

  2. Overview of Cells & Energy (Revision)

    A virus is a non-cellular structure of DNA or RNA surrounded by a protein coat. Unicellular organisms carry out all the functions of life In multicellular organisms, all cells contain genes. By only expressing some of their genes, the cells in multicellular organisms differntiate to carry out specialized jobs.

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