Can someone explain and collaborate the process of Cellular Respiration?

Hey. In Biology, we are going over cellular respiration. But, I don't entirely understand it.

Can someone please explain to me the steps and processes of cellular respiration and what happens and stuff like that?

3 Answers

  • 1 decade ago
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    Cellular respiration is the process your cells undertake to derive energy from carbohydrates. Carbohydrates are broken down by enzymes to the simplest sugar, glucose, a 6C sugar. There's a lot of stored energy in glucose, and in order to get it out, the cell has to convert glucose to a form of energy it can actually use.

    There are three primary steps: glycolysis, the Krebs cycle, and the electron transport chain. Together, these steps yield 30-32 ATP (a molecule that contains energy).

    In glycolysis, glucose is converted via several reactions to pyruvate (sometimes called pyruvic acid). This produces 2 ATP (4 ATP produced total - 2 ATP used to break down glucose)

    Pyruvate is then funneled to the Krebs cycle. The main point of the Krebs cycle is to convert pyruvate into the high energy intermediates ATP, NADH and FADH2. NADH and FADH2 are similar to ATP, but just energy in another form. However, the cell prefers to only use ATP, so these have to be further converted.

    NADH and FADH2 are funneled into the electron transport chain. They still contain a lot of energy. If all this is energy is released at once, it can't be harnessed. So, NADH and FADH2 slowly release their energy in the electron transport chain. The energy they release is used by the ETC to pump hydrogen ions (protons) against their gradient. These protons then go through the enzyme ATP synthase, which ultimately converts the energy that used to be NADH and FADH2 to ATP.

    Source(s): biology major
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  • Anonymous
    1 decade ago

    I just learned about this!

    In cellular respiration, you use a glucose molecule (c6h12o6) and o2 and it makes co2, h2o, and ATP.

    The first step in cellular respiration is glycolysis, or the breakdown of sugar. The glucose molecule enters a cell and in the cytosol turns into 2 pyruvates (c3h3o3). This process makes 4 ATPs but uses 2, so the net

    gain is 2. Using the carrier NAD, the pyruvate is transported to the mitochondria.

    Next in the cristae (folds in mitochondria) the pyruvate turns into acytol coA. This then goes thru the citric acid cycle. This cycle makes 2 ATPs, but it's main purpose is to free up the electrons from the carriers NAD and FAD.

    The next step is oxidative phosphorylation. In this the electron transport chain transports the electrons. This process does not make ATP and it has 4 sections. Soon, chemiosmosis will occur. This is when the ATPs leave the mitochondrial membrane. Oxidative phosphorylation makes 32-34 ATP depending on what living creature the process is going on in. The total process makes 36-38 ATPs.

    Hope this will help you.

    By the way I'm only 14

    Source(s): Ap biology book & mrs. labno
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  • 3 years ago

    Glycolysis: a million glucose+ oxygen= acetyl coA, no oxygen= alcohol or lactic acid in cytoplasm Kreb cycle: acetyl coA produce ATP, NADH, FADH in mitochondria matrix Electron delivery chain: use H+ to make ATP in mitochondria membrane.

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