Cellular Respiration and Enzymes

The hexose monophosphate shunt (HMP shunt) is alternatively known as the phosphogluconate pathway or pentose phosphate pathway. It's a metabolic pathway parallel to glycolysis that generates NADPH and pentose sugars.

Restriction enzymes like EcoRI are called 'molecular scissors' because they cut DNA at specific recognition sequences (EcoRI cuts at GAATTC). This ability to precisely cleave DNA makes them essential tools in genetic engineering for creating recombinant DNA. Glucose oxidase, isocitrate dehydrogenase, and homoserine dehydrogenase are metabolic enzymes, not nucleases.

Malate is oxidised to oxaloacetate using NAD⁺ in the cytosol. In the final reaction of gluconeogenesis, glucose-6-phosphate is hydrolysed by glucose-6-phosphatase to produce glucose. It occurs in the lumen of the endoplasmic reticulum.

According to this theory, the enzyme molecule undergoes configurational or geometric changes in the active site on contact with the substrate.

According to this model, the union between the substrate and the enzyme takes place at the active site more or less in a manner in which a key fits a lock and results in the formation of enzyme-substrate complex.

These enzymes break down large molecules into smaller ones by the introduction of water and breaking of specific covalent bonds. They are hydrolases.

No, this is incorrect. Lysososmes  are involved in the digestion of materials from within the cell. Mitochondria are the power house of the cell. They are not involved in digestion.

During anaerobic respiration in yeast (fermentation), only 2 ATP molecules are produced per glucose molecule via glycolysis. To produce 38 ATPs, we need 38/2 = 19 glucose molecules. This calculation highlights the inefficiency of anaerobic respiration compared to aerobic respiration, where one glucose yields approximately 38 ATPs. The huge difference explains why organisms prefer aerobic respiration when oxygen is available.

Ubiquinone, also known as Coenzyme Q10 (CoQ10), is a lipid-soluble coenzyme that plays a crucial role in the electron transport chain during cellular respiration. It functions as an electron carrier, shuttling electrons between Complex I/II and Complex III of the mitochondrial respiratory chain. It is not an enzyme, apoenzyme, or primary electron acceptor itself.

 Acetylcholinesterase is a hydrolase that hydrolyses the neurotransmitter acetylcholine. Alkaline phosphatase is a hydrolase enzyme responsible for removing phosphate groups from many types of molecules, including nucleotides, proteins, and alkaloids.