About 4 times more ATP is generated during oxidative phosphorylation than substrate-level phosphorylation.
<h3>Oxidative phosphorylation:</h3>
In the metabolism process known as oxidative phosphorylation, also known as electron transport-linked phosphorylation or terminal oxidation, cells employ catalysts to oxidize carbohydrates, liberating chemical energy and producing adenosine triphosphate (ATP) as a consequence.
- According to some modern studies, the ATP output after aerobic respiration is only approximately 30-32 ATP molecules /molecule of glucose, rather than 36-38, because:
During oxidative phosphorylation,
- the ATP: NADH+H+ and ATP: FADH2 ratios appear to be 2.5 and 1.5 instead of 3 and 2, respectively.
<h3>Substrate level phosphorylation:</h3>
- Substrate-level phosphorylation is a metabolic activity that produces ATP or GTP by the direct transfer of a phosphoryl (PO3) group from another phosphorylated chemical to ADP or GDP.
- Substrate level phosphorylation happens via glycolysis and the Krebs cycle. It happens in two phases during glycolysis, and because 2 molecules are involved, it eventually creates 4 ATP from a glucose molecule.
- As a result, the total ATP molecules generated from substrate-level phosphorylation of a glucose molecule during aerobic respiration will be 4+2 = 6.
Therefore, it is concluded that ATP generated during oxidative phosphorylation is 30-6=24 or 32-6=26 i.e., about 4 times than substrate-level phosphorylation.
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Answer:
Ribosomes are found 'free' in the cytoplasm or bound to the endoplasmic reticulum (ER) to form rough ER.
Explanation:
In a mammalian cell there can be as many as 10 million ribosomes. Several ribosomes can be attached to the same mRNA strand, this structure is called a polysome.
Answer:
somatic motor neuron hyperexcitability; inhibition
The neuronal circuitry to skeletal muscles involves neurons that stimulate contractions and those that inhibit contractions. The muscle spindles and Golgi tendon organs are involved in maintaining the proper muscle tonus (resting muscle tension); they work by signaling the CNS. Since tetanus involves SOMATIC MOTOR NEURON HYPEREXCITABILITY, the neurons involved in muscle contraction INHIBITION are affected.
Explanation:
Tetanus is a infection that is caused by a bacteria called Clostridium tetani. It occurs when open wounds in the body are not properly treated and they get infected. This wound can be caused by stepping on a nail or sharp object like broken bottle.
When tetanus enters an open wound present on the body, it attacks the neurons in the body, specifically the somatic motor neurons. Tetanus hinders the release of neurotransmitters and blocks the inhibitory properties of the muscles. These causes the muscles of the body to contract unhindered and uncontrollably resulting in spasms. This can also be referred to as neuronal hyperexcitabilty.
Answer: In respiration, glucose is broken down to produce energy that can be used by the cell, a reaction that uses O 2 and produces CO 2 as a byproduct.
Explanation:
