Which statement about energy is true for all living things? One characteristic that living things share is metabolism. Which statement best describes metabolism? Metabolism is the sum of all of the chemical processes required for an organism to stay alive.
Which of the following is the best description for metabolism?
Metabolism, the sum of the chemical reactions that take place within each cell of a living organism and that provide energy for vital processes and for synthesizing new organic material.
Which of the statements best describes the overall role of enzymes in metabolism?
Anabolic pathways are synthesis pathways, whereas catabolic pathways are degradation pathways. Which of the following best describes the overall role of enzymes in metabolism? Enzymes increase the speed of reactions. … An enzyme catalyzes a reaction in a way that results in a lower activation energy.
Which of the following best describes metabolism in its entirety in all organisms?
Which of the following is true of metabolism in its entirety in all organisms? Metabolism consists of all the energy transformation reactions in an organism. … Energy cannot be created or destroyed.
Which of the following statements best describes a primary mechanism by which the energy released in ATP hydrolysis is used directly to drive Endergonic chemical reactions in a cell?
What best describes a primary mechanism by which the energy released in ATP hydrolysis is used directly to drive endergonic chemical reactions in a cell? The released phosphate is used to form phosphorylated intermediates that are more reactive than the original unphosphorylated substrate.
What are the five metabolic processes?
In humans, the most important metabolic pathways are: glycolysis – glucose oxidation in order to obtain ATP. citric acid cycle (Krebs’ cycle) – acetyl-CoA oxidation in order to obtain GTP and valuable intermediates. oxidative phosphorylation – disposal of the electrons released by glycolysis and citric acid cycle.
What does high metabolism mean?
The faster your metabolism, the more calories your body needs. Metabolism is the reason some people can eat a lot without gaining weight, while others seem to need less to accumulate fat. The speed of your metabolism is commonly known as metabolic rate.
What are the roles of enzymes in metabolism?
Some enzymes help to break down large nutrient molecules, such as proteins, fats, and carbohydrates, into smaller molecules. Each enzyme is able to promote only one type of chemical reaction. … The compounds on which the enzyme acts are called substrates.
What is metabolism process?
Metabolism (pronounced: meh-TAB-uh-liz-um) is the chemical reactions in the body’s cells that change food into energy. … Specific proteins in the body control the chemical reactions of metabolism. Thousands of metabolic reactions happen at the same time — all regulated by the body — to keep our cells healthy and working.
What is the role of metabolism?
Metabolism is the process by which your body converts what you eat and drink into energy. … Even when you’re at rest, your body needs energy for all its “hidden” functions, such as breathing, circulating blood, adjusting hormone levels, and growing and repairing cells.
What is a Nonprotein helper of an enzyme molecule called?
Enzyme activity may be turned “up” or “down” by activator and inhibitor molecules that bind specifically to the enzyme. Cofactors. Many enzymes are only active when bound to non-protein helper molecules known as cofactors. Compartmentalization.
How does a noncompetitive inhibitor decreases the rate of an enzyme catalyzed reaction?
Noncompetitive inhibition of an enzyme can occur when an inhibitor binds to an enzyme at a site other than the active site. The noncompetitive inhibitor slows down the reaction rate, i.e. the rate of the product formation is less with inhibitor present than with inhibitor absent.
Where is energy stored in ATP?
Energy is stored in the bonds joining the phosphate groups (yellow). The covalent bond holding the third phosphate group carries about 7,300 calories of energy.
What is the chemical structure of ATP?
What are the three parts of an ATP molecule?
ATP is a nucleotide that consists of three main structures: the nitrogenous base, adenine; the sugar, ribose; and a chain of three phosphate groups bound to ribose.