When Chemical Transport Or Mechanical Work Is Done

When Chemical Transport Or Mechanical Work Is Done?

BIO Test 2
Question Answer
When chemical transport or mechanical work is done by an organism what happens to the heat generated? It is lost to the environment

Is a mechanism in which the end product of a metabolic pathway inhibits the activity of an enzyme that catalyzes an early step in the pathway?

Feedback inhibition: Metabolic pathways are a series of reactions catalyzed by multiple enzymes. Feedback inhibition where the end product of the pathway inhibits an earlier step is an important regulatory mechanism in cells.

Is a regulatory mechanism in which the end product of a metabolic pathway?

Feedback inhibition where the end product of the pathway inhibits an upstream process is an important regulatory mechanism in cells. The production of both amino acids and nucleotides is controlled through feedback inhibition.

When ATP releases some energy it also releases inorganic phosphate what happens to the inorganic phosphate in the cell quizlet?

In fermentation _____ is reduced and _____ is oxidized. stored in the NADH produced. used to phosphorylate fructose to form fructose 6-phosphate. transferred to ADP forming ATP.

When ATP releases some energy it also releases inorganic phosphate What purpose does this serve?

Question: Question 7 1 pts When ATP releases some energy it also releases inorganic phosphate. What purpose does this serve (if any) in the cell? The phosphate is released as an excretory waste. The phosphate can be added to water and excreted as a liquid.

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When a chemical transport or mechanical work is done by an organism what happens to the heat generated?

BIO Test 2
Question Answer
When chemical transport or mechanical work is done by an organism what happens to the heat generated? It is lost to the environment

How does the final product of the pathway inhibit the pathway?

In the example above how does the final product of the pathway inhibit the pathway? By binding to an allosteric site of the first enzyme in the pathway. … If the end product of the biochemical pathway in the animation increases it would eventually result in an increase in substrate 2.

What is the best way to control a metabolic pathway?

The best way to control a metabolic pathway is to control the fastest enzyme in the series. All organisms that are photosynthetic are oxygenic.

Does physical exercise involve anabolic and/or catabolic processes?

Physical exercise involves both anabolic and catabolic processes. Body cells break down sugars to provide ATP to do the work necessary for exercise such as muscle contractions. This is catabolism. Muscle cells also must repair muscle tissue damaged by exercise by building new muscle.

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Which of the following is a mechanism used to regulate enzyme activity?

Which of the following is a mechanism used to regulate enzyme activity? The only answer listed that regulates enzyme activity is feedback inhibition.

What purpose does inorganic phosphate serve in the cell?

Inorganic phosphate (Pi) has long been known to play an important role in biological systems. It is essential for structural integrity of cells for example as a constituent of membrane phospholipids. It is also involved in a host of anabolic and catabolic processes.

What event takes place in the electron transport chain?

In the electron transport chain electrons are passed from one molecule to another and energy released in these electron transfers is used to form an electrochemical gradient. In chemiosmosis the energy stored in the gradient is used to make ATP.

How does an enzyme work to catalyze a reaction?

To catalyze a reaction an enzyme will grab on (bind) to one or more reactant molecules. … This forms the enzyme-substrate complex. The reaction then occurs converting the substrate into products and forming an enzyme products complex. The products then leave the active site of the enzyme.

What happens to the inorganic phosphate in the cell quizlet?

What happens to the inorganic phosphate in the cell? It may be used to form a phosphorylated intermediate. When chemical transport or mechanical work is done by an organism what happens to the heat generated? It is lost to the environment.

What is often the fate of the inorganic phosphate that is released?

It is lost to the environment. When ATP is hydrolyzed to activate a target protein what is often the fate of the inorganic phosphate that is released? It may be use to form phosphorylated intermediate.

Where is energy stored and subsequently released from when ATP is used as an energy currency molecule quizlet?

ATP is a nucleotide that contains a large amount of chemical energy stored in its high-energy phosphate bonds. It releases energy when it is broken down (hydrolyzed) into ADP (or Adenosine Diphosphate). The energy is used for many metabolic processes.

When ATP is hydrolyzed to ADP what happens?

When one phosphate group is removed by breaking a phosphoanhydride bond in a process called hydrolysis energy is released and ATP is converted to adenosine diphosphate (ADP). Likewise energy is also released when a phosphate is removed from ADP to form adenosine monophosphate (AMP).

Which statement is true for the chemical reaction C6H12O6 6o2 → 6CO2 6H2O?

True. The carbon atoms in glucose are in a reduced state compared with those in CO2 in which they are fully oxidized. The oxidation of sugar molecules by the cell takes place according to the general reaction C6H12O6 (glucose) + 602 → 6CO2 + 6H2O + energy.

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Which of the following processes would be an example of catabolic pathway?

Examples of catabolic processes include glycolysis the citric acid cycle the breakdown of muscle protein in order to use amino acids as substrates for gluconeogenesis the breakdown of fat in adipose tissue to fatty acids and oxidative deamination of neurotransmitters by monoamine oxidase.

How does end product inhibition work?

Another way a metabolic pathway can be controlled is by feedback inhibition. This is when the end product in a metabolic pathway binds to an enzyme at the start of the pathway. This process stops the metabolic pathway and so prevents further synthesis of the end product until the end product concentration decreases.

What is an example of end product inhibition?

What happens during end product inhibition?

End-product inhibition is also termed feedback inhibition. … End-product inhibitors bind to the allosteric site on the enzyme that causes changes in the shape of the enzyme altering the active site. In feedback inhibition the end product binds to the allosteric site which causes changes in the enzyme.

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What are chemical pathways?

In biochemistry a metabolic pathway is a linked series of chemical reactions occurring within a cell. The reactants products and intermediates of an enzymatic reaction are known as metabolites which are modified by a sequence of chemical reactions catalyzed by enzymes.

How do enzymes speed up chemical reactions?

Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction the faster the rate. Thus enzymes speed up reactions by lowering activation energy.

How do cells keep chemical reactions in balance?

How Do Cells Keep Chemical Reactions in Balance? Cells are expert recyclers. They disassemble large molecules into simpler building blocks and then use those building blocks to create the new components they require. … In this process energy is either stored in energy molecules for later use or released as heat.

How do chemical reactions play a role in energy transfer?

How do chemical reactions play a role in energy transfer? Energy from the breakdown of glucose and other molecules in animals is released as ATP which transfer energy to other reactions. … The transition state of the reaction exists at a higher energy level than the reactants.

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Is respiration anabolic or catabolic?

The respiration is a catabolic process as it breaks the complex molecules into simple molecules and releases energy in the form of ATP.

Is digestion anabolic or catabolic?

Each metabolic reaction is either catabolic or anabolic. In a catabolic reaction molecules are broken down into smaller components and energy is released. The breakdown of food in digestion is a catabolic reaction (see digestive system).

Is phosphorylation allosteric regulation?

Regulation by phosphorylation is a particularly common mechanism in intracellular signalling. … The kinase that catalyses the phosphorylation of pyruvate decarboxylase is subject to allosteric regulation by a number of small molecules including acetyl CoA pyruvate and ADP as indicated in Figure 34 .

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What are two possible mechanisms for how enzymes are regulated?

Enzymes can be controlled or regulated in two ways: controlling the synthesis of the enzyme (genetic control) and controlling the activity of the enzyme (feedback inhibition).

Which of the following is an example of chemical work within a cell?

Your cells perform three main types of work: chemical work mechanical work and transport work (Figure 7-10). An example of chemical work is building large molecules such as proteins. ATP provides the energy for the dehydration synthesis reaction that links amino acids together.

What is the pH of inorganic phosphate?

6.2-7.4

The influence of 30 mM inorganic phosphate (Pi) and pH (6.2-7.4) on the rate of ATP utilization was determined in mechanically skinned bundles of myofibrils from the iliofibularis muscle of Xenopus laevis at approximately 5 °C.

What is the difference between organic and inorganic phosphate?

Phosphate compounds are in two types as organic phosphates and inorganic phosphates according to the chemical structure. The difference between organic and inorganic phosphate is that the organic phosphates are phosphates of esters whereas the inorganic phosphates are salts of phosphoric acid.

Does ATP release free energy?

ATP is a highly unstable molecule. Unless quickly used to perform work ATP spontaneously dissociates into ADP + Pi and the free energy released during this process is lost as heat. To harness the energy within the bonds of ATP cells use a strategy called energy coupling.

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