Biochemistry

Fatty acid oxidation contributes significantly to the energy demands of the mammalian heart and liver, providing around 80% of the total energy.

In the urea cycle, carbamoyl phosphate reacts with ornithine to form citrulline. This is an important step in the detoxification of ammonia in the liver.

The human body can synthesize 13 non-essential amino acids, while the remaining 9 essential amino acids must be obtained from the diet.

Translation in the ribosome results in the formation of a polypeptide chain, which is composed of amino acids linked by peptide bonds.

During cellular respiration, each NADH molecule contributes to the production of 3 ATP molecules through the electron transport chain.

Disaccharides, such as sucrose, lactose, and maltose, are composed of two monosaccharide units. Fructose, however, is a monosaccharide and does not fall under the category of disaccharides.

rRNA makes up the majority of RNA in a cell, as it is a major component of ribosomes, which are essential for protein synthesis.

During intense exercise, when oxygen supply is limited, the body switches to anaerobic respiration. In this process, pyruvate accepts a hydrogen ion (H+) to form lactate. This process is known as lactic acid fermentation.

Saturated fatty acids consist of carbon chains where all the carbon atoms are connected by single bonds. This structure results in straight chains, making them solid at room temperature (e.g., butter).

The activation of an enzyme through its inactive site is a feature of allosteric regulation. In this mechanism, the inactive site binds with specific molecules (allosteric activators) in a ”perfect fit,” causing a conformational change in the enzyme. This change activates the enzyme, allowing the active site to bind to its substrate and catalyze the reaction efficiently. This process is crucial for regulating enzyme activity in response to cellular signals.

Proteins are macromolecules composed of amino acids, which contain carbon, hydrogen, oxygen, and nitrogen as their fundamental elements. These elements form the backbone of amino acid structures, which then link together to form protein chains. The unique inclusion of nitrogen distinguishes proteins from carbohydrates and fats.

- Albumin: Transports calcium, helps maintain osmotic pressure.
- Trans Thyretin: Transports Vitamin A.
- Trans Ferrin: Binds and transports iron in the bloodstream.
- Ceruloplasmin: Carries copper, playing a role in iron metabolism.

The correct sequence of glycolysis intermediates is: Glucose 6-Phosphate, Fructose 6-Phosphate, Glyceraldehyde 3-Phosphate, 3-Phosphoglycerate, and Pyruvate.

The smooth endoplasmic reticulum (SER) is responsible for the detoxification of drugs and other harmful substances in the cell.

The atomic symbol for Calcium is ”Ca,” derived from its Latin name ”Calcium.”