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I'm doing a project with my friends for bio class. We have to make a book about photosynthesis and this is one of our topics; however, we can't figure out what organisms do glycolysis.

2006-12-26 02:51:00 · 5 answers · asked by lys 1 in Science & Mathematics Biology

5 answers

I think you may be asking what is the difference of Glycolysis in Plants compared to animals:or what organs in animals do glycolysis.
Glycolysis in Plants Compared with Animals Glycolysis uses the same basic set of reactions (with some variations) in plants and animals. However, there are some important differences between how the pathways are operated. This occurs because animals use glycolysis to generate pyruvate that can be oxidized in the mitochondria to make ATP (and make C-skeletons useful for biosynthesis). Plants, and leaves in particular, often use glycolysis (or a portion of the pathway) to synthesize sugars. Animal cells do this to, it’s referred to a gluconeogenesis, and it occurs primarily in the liver and kidneys. It supplies glucose for use by other organs, particularly the heart, brain, and nervous system. Because leaves can derive ATP from photosynthesis, glycolysis is very often not used for ATP production at all, but rather as a source of sugars for export to other organs. The major differences are outlined below.
1. A major difference between glycolysis in plants and other organisms is that the pathway is carried out in plastids as well as in the cytosol.
2. A second important difference is how materials enter glycolysis. In plants, materials enter as: starch, sucrose, triose-P (G3P or DHAP) 3PGA or PEP. In other words, there are many potential entry points. This is because these compounds are ones that can be transported back and forth between the plastid and the cytosol. Animals generally utilize glucose distributed by the blood stream as the primary entry point for carbon into glycolysis. When they have to carry out gluconeogenesis, lactate and pyruvate (and sometimes amino acids) are the major compounds that feed into the pathway (that is, at or near the bottom only).
3. A third major difference is the point in the pathway over which control is exerted. In plants, the pathway is described as being regulated from the bottom up rather than the top down.
4. Finally, anaerobiosis leads to alcoholic fermentation in plants and many microorganisms. In animals, pyruvate is converted into lactic acid when O2 levels are low (like when you’re exercising hard and your muscles begin to “burn”; this is a result of lactic acid build up in your muscles)

2006-12-26 04:39:47 · answer #1 · answered by amyth74 2 · 0 0

Glycolysis begins with a single molecule of glucose and concludes with the production of two molecules of pyruvic acid. The pathway is seen to be degradative, or catabolic, in that the six-carbon glucose is reduced to two molecules of the three-carbon pyruvic acid. Much of the energy that is liberated upon degradation of glucose is conserved by the simultaneous formation of the so-called high-energy molecule adenosine triphosphate (ATP). Two reactions of the glycolytic sequence proceed with the concomitant production of ATP, thus ATP synthesis is said to be coupled to glycolysis. Hundreds of cellular reactions, particularly those involved in the synthesis of cellular components and those that allow the cell to perform mechanical work, require the participation of ATP as a source of chemical energy. While glycolysis is the primary fuel process for some organisms that do not require oxygen, such as yeast, aerobic organisms can only gain a small portion of their needed energy from this process. Glycolysis occurs in two major stages, the first of which is the conversion of the various sugars to a common intermediate, glucose-6-phosphate. The second major phase is the conversion of glucose-6-phosphate to pyruvate. The products of glycolysis are further metabolized to complete the breakdown of glucose. Their ultimate fate varies depending upon the organism. In certain microorganisms lactic acid is the final product produced from pyruvic acid, and the process is referred to as homolactic fermentation. In certain bacteria and in brewer's yeast, lactic acid is not produced in large quantities. Instead pyruvic acid, which is also the precursor of lactic acid, is converted to ethanol and carbon dioxide by an enzyme-catalyzed two-step process, termed alcoholic fermentation. In the tissues of many organisms, including mammals, glycolysis is a prelude to the complex metabolic machinery that ultimately converts pyruvic acid to carbon dioxide and water with the concomitant production of much ATP and the consumption of oxygen

2006-12-26 02:56:58 · answer #2 · answered by Dinesh D 1 · 0 0

Glycolysis Plants

2016-12-13 04:51:18 · answer #3 · answered by ? 4 · 0 0

glycolysis, an ATP-generating metabolic process that occurs in nearly ALL LIVING CELLS in which glucose is converted in a series of steps to pyruvic acid.
The metabolic breakdown of glucose and other sugars that releases energy in the form of ATP.

2006-12-26 02:54:11 · answer #4 · answered by Som™ 6 · 0 0

look it up in the dictories, i don't know.

2006-12-26 02:58:18 · answer #5 · answered by Ugly George Bush 3 · 0 0

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