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Chemical Messengers Animation

By: Administrator, Views: 11325

Three types of chemical messengers.

Calvin cycle (The light-independent reactions )

By: HWC, Views: 7493

The light-independent reactions of photosynthesis occur in the stroma of the chloroplast. Carbon dioxide enters the leaf through tiny pores or stomata and diffuses into the chloroplast. The first stage of the Calvin cycle is the attachment of a carbon dioxide molecule to a 5-carbon ribulose bi...

Miller's reaction chamber experiment Animation

By: HWC, Views: 1323

A simple diagram of Stanley Miller and Harold Urey's experimental apparatus. The lower portion of the apparatus was filled with water. The upper portion was filled with a mixture of gases that simulated the earth's early atmosphere. Examples are methane, ammonia, hydrogen and carbon dioxide. ...

Splitting of Sugar, Oxidation/ Reduction & ATP Generation

By: HWC, Views: 7504

The next reaction shows us the meaning of "glycolysis" or the splitting of glucose. The fructose bisphosphate molecule is split into two molecules each containing 3 carbons as the backbone. FBP is split into two 3-carbon molecules called G3P, or glyceraldehyde 3-phosphate. Notice that the phos...

Michaelis–Menten equation & Kinetic parameters

By: HWC, Views: 7518

The Michaelis–Menten equation is the rate equation for a one-substrate enzyme-catalyzed reaction. This equation relates the initial reaction rate (v0), the maximum reaction rate (Vmax), and the initial substrate concentration [S] through the Michaelis constant KM—a measure of the substrat...

Labor and Delivery - Postpartum Assessment

By: Administrator, Views: 475

The postpartum patient's emotional status plays a significant part in her recovery and her adjustment to her infant. Postpartum hospital stays are very brief, so nurses must make every encounter with the patient meaningful. Developing a systematic method of assessing the patient will save time an...

Glycolysis - Introduction to ATP and the burning of sugar

By: HWC, Views: 7870

Do you use sugar with your coffee or tea? Or do you occasionally drink a sport or soft drink? As millions of people do each day, they obtain energy from the sugar added or contained in these drinks. How can we understand this concept of energy within a sugar molecule? Let's take a tablespoon ...

Digestive chemicals - types & enzymes

By: HWC, Views: 7734

• Chemical digestion breaks down food as it moves through the digestive tract. • Using enzymes and other digestive chemicals, the process reduces food particles into nutrient molecules that can be absorbed. • Most chemical digestion is done by the actions of digestive enzymes. • O...

Enzyme structure - Properties of enzymes

By: HWC, Views: 7700

■ Enzymes are proteins that catalyze reactions. ■ Some enzymes have two parts: a protein or apoenzyme and a non-protein or cofactor. ■ Cofactor can be a metal ion or another organic molecule called a coenzyme. ■ Coenzymes often come from vitamins. ■ Cofactors affect the shape of...