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Cellular Respiration Cellular Respiration I/ Introduction - Cellular respiration is the cellular process whereby carbon-containing compounds are broken down through
yeast respiration Biology-Respiration-Rate of Yeast Respiration Aim: An investigation to find out how temperature affects the rate of yeast respiration. Variables:
Cellular Respiration vs. Photosynthesis Cellular Respiration vs. Photosynthesis To obtain energy needed for life, organisms depend on the processes of cellular respiration
Glycolysis Cellular respiration is the process in which the chemical bonds of energy-rich molecules such as glucose are converted into energy usable for life processes.
What is Cell Respiration What is Cell Respiration? And what is Photosynthesis? And what, is there effect on our lives? In this paper I'll be discussing these topics
Submitted by murtazaziz on February 1, 2006
Category: Science
Words: 1066 | Pages: 5
Views: 142
Popularity Rank: 90,384
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The molecule known as ATP, short for adenosine triphosphate, it the key for cellular work. The cell taps this energy source, ATP, by using enzymes to transfer phosphate groups from ATP to other compounds, which is the process of phosphorylation. The price of most cellular work is the conversion of ATP to ADP and inorganic phosphate. To keep working, the cell must regenerate its supply of ATP from ADP and inorganic phosphate. Three processes which involve the usage or formation of ATP are cellular movement, active transport, and chemiosmosis.
All cell movements are a manifestation of mechanical work; they require a fuel (ATP) and proteins that convert the energy stored in ATP into motion through ATP hydrolysis. The cytoskeleton, a cytoplasmic system of fibers, is critical to cell motility. The cytoskeleton, which consists of three parts: microfilaments, intermediate filaments, and microtubules, plays a structural role by supporting the cell membrane and by forming tracks along which organelles and other elements move in the cytosol. Cells have evolved two basic mechanisms for generating movement. One mechanism involves a special class of enzymes called motor proteins. These proteins use energy from ATP to walk or slide along a microfilament or a microtubule. Some motor proteins carry membrane-bound organelles and vesicles along the cytoskeletal fiber tracks; other motor proteins cause the fibers to slide past each other. The other mechanism responsible for many of the changes in the shape of a cell implies assembly and disassembly of microfilaments and microtubules. A few movements involve both the action of motor proteins and cytoskeleton rearrangements.
The process of active transport also requires energy in the form of ATP. Active transport is the pumping of molecules or ions through a membrane against their concentration gradient. Active transport is limited by the number of protein transporters present. There are two types of active...
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