Exploring the Ways in Which Organisms Use ATP Essay

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Exploring the Ways in Which Organisms Use ATP

The major energy currency molecule of the cell, ATP, is evaluated in the context of creationism. This complex molecule is critical for all life from the simplest to the most complex. It is only one of millions of enormously intricate nanomachines that needs to have been designed in order for life to exist on earth. This molecule is an excellent example of irreducible complexity because it is necessary in its entirety in order for even the simplest form of life to survive.

The ATP is used for many cell functions including transport work moving substances across cell membranes. It is also used for mechanical work, supplying the energy needed for
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Subsequent removal of ATP causes the protein to return to its original shape, and thus it is again functional. The cycle can be repeated until the molecule is recycled, effectively serving as an on and off switch. Both adding a phosphorus (phosphorylation) and removing a phosphorus from a protein (dephosphorylation) can serve as either an on or an off switch.

Muscle cells contain many myofibrils that in turn are made out of thick and thin filaments. The sliding of the filaments is the result of interactions between myosin cross-bridges and the thin filaments. The cross-bridges reversibly bind to actin and produce a mechanical impulse which results in force transmission along the filaments, which either results in force production at the tendons, or results in shortening (or a combination of both). The energy for this process comes from the hydrolysis of ATP, resulting in the release ADP and P. The link between movement or force and the utilization of ATP is the fundamental aspect of muscle contraction, sometimes referred to as the energy transduction process.

Active transport requires energy to pump molecules across a membrane against a concentration gradient. It is estimated that cells use as much as 25% of their total ATP on active transport. Ion pumps directly couple ATP hydrolysis to transport. A well-studied example

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