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Anabolism and catabolism are two subcategories of metabolism. Metabolism is a term that refers to the chemical reactions or rates at which the body consumes calories to maintain the cells' and organism's living state. Nutrition is necessary to sustain a healthy metabolic rate. The basic goal of nutrition is to always keep anabolism above catabolism. Anabolism refers to the process of growth, whereas catabolism refers to the process of breakdown.
| Table of Content |
Keyterms: Anabolism, Catabolism, Metabolism, Organism, Proteins, Polysaccharides, Fats, Amino acids, Monosaccharides, Fatty acids
Read More: Hormonal Imbalance
What is Catabolism?
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Catabolism is the breakdown of big or complex molecules like proteins, polysaccharides, and fats into smaller molecules like amino acids, monosaccharides, and fatty acids, which is a subdivision of metabolism. It is a metabolic condition that is destructive in nature. Glycolysis and the citric acid cycle are both involved in this process.
Catabolism
The metabolic process of converting glucose to pyruvic acid and a hydrogen ion is known as glycolysis. It is a ten-reaction chain catalyzed by enzymes. The energy released during this process is used to create NADH (nicotinamide adenine dinucleotide) and ATP (adenosine triphosphate) (adenosine triphosphate).
The citric acid cycle is a series of chemical events that aerobic organisms employ to convert stored energy from the oxidation of carbs, lipids, and proteins into usable energy. Catabolism is a breakdown feature of metabolism, whereas anabolism is a buildup feature.
Catabolism Process
The following are examples of catabolic processes:
- Citric acid cycle
- Glycolysis
- Lipolysis
- Oxidative deamination
- Muscle tissue breakdown
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| Chapter Related Topics | ||
|---|---|---|
| Microbodies | Amino Acids | Vitamin B |
| Mycology | diagram of mitochondria | Discovery of Cells |
What is Anabolism?
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Another subcategory of metabolism is anabolism, which aids in the formation of molecules from smaller units. It is a chemical process in which nutrients are used to produce relatively complex molecules in living cells with considerably simpler structures. This process requires energy in the form of ATP to produce cell components such as proteins, carbohydrates, and lipids.
Anabolism
Anabolism is a buildup feature of metabolism, whereas catabolism is a breakdown feature. Biosynthesis is another name for it. Proteins, nucleic acids, and polysaccharides are all made up of macromolecules, and anabolism aids in their construction.
These macromolecules are made from small molecules with the help of enzymes and non-protein chemical compounds essential for enzyme activity.
Catabolic Hormones
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The following are the list of Catabolic Hormones.
Adrenaline
The adrenal gland produces adrenaline or Epinephrine. It aids in heart rate acceleration and is a key component of the “fight-or-flight” response.
Cortisol
The adrenal gland also produces cortisol or stress hormones. Anxiety, uneasiness, and other emotions cause the release of this hormone. It raises blood sugar and blood pressure levels.
Catabolic Hormones
Glucagon
The pancreas is where glucagon is made. It aids the conversion of glycogen to glucose. When the body requires extra energy for activities such as combat, exercise, or a high degree of stress, it is stored in the liver and stimulates the liver to release glycogen.
Cytokines
When amino acids are repurposed for various purposes in the body, cytokines are generated and broken down. It's a tiny protein that aids in cell-to-cell communication.
Read Also: Cortisol Hormone Important Notes
Anabolic Hormones
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The following are the list of Anabolic Hormones.
Testosterone
The testes are where testosterone is produced. It can be found in both males and females. Some male sexual features, such as facial hair, muscle bulk, voice, and bone strength, are influenced by testosterone management.
Testosterone
Oestrogen
The ovaries are where oestrogen is produced. It can be found in both males and females. The menstrual cycle occurs as a result of oestrogen regulation, which results in breast enhancement, hip expansion, and increased bone strength in women.
Growth Hormones
Pituitary glands produce growth hormones. It accelerates and regulates growth during the early stages of life. It aids in the regulation of bone healing in adults.
Growth Hormone
Insulin
The pancreas is where insulin is produced. It aids in the control of blood sugar and blood pressure. Diabetes is caused by the body's inability to produce insulin. The body cannot use glucose if insulin is not present.
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| Important Topics | ||
|---|---|---|
| lipoproteins | Endomembrane System | Plastids |
| Eukaryotic Cells | Mitochondria | Cytoskeleton |
Differences Between Catabolism and Anabolism
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The key differences between Catabolism and Anabolism are tabulated below.
| Characteristic | Catabolism | Anabolism |
|---|---|---|
| Introduction | It is a metabolic chemical reaction that breaks down complicated compounds into smaller, simpler molecules. | It is a metabolic chemical process that creates the chemicals needed for the body's energy to perform various tasks. |
| Energy | In this state, the body expends energy in a variety of ways. | The body requires energy to maintain an anabolic state in this state. The primary source is nutrition. |
| Energy Conversion | Energy is transformed from potential to kinetic energy during catabolism. | Energy is transformed from kinetic to potential energy during anabolism. |
| Effect on Human Body | Catabolism is a metabolic process that aids in the burning of fats and calories. | Anabolism aids in the provisioning and preservation of tissues, as well as muscle growth. |
| Oxygen Usage | Catabolism is a metabolic process that makes use of oxygen. | When compared to catabolism, anabolism uses less oxygen. |
| Functionality | During activities, catabolism is active. | During rest or sleep, anabolism is active. |
| Role | In metabolism, the principal duty is destruction. | In metabolism, building is the most important duty. |
| Hormones | Adrenaline, cytokines, cortisol, and glucagon are the hormones that cause this condition. | Oestrogen, testosterone, growth hormone, and insulin are the hormones that cause this condition. |
| Exercise | Workouts that are catabolic are usually aerobic exercises. The body burns calories and fat in this way. | Most anabolic exercises are anaerobic in nature. The body builds muscular mass in this way. |
| Example | Proteins become amino acids, glycogen becomes glucose, and triglycerides form fatty acids as a result of this chemical reaction. | Amino acids produce proteins, glucose becomes glycogen, and fatty acids become triglycerides in this chemical reaction. |
Differences between Catabolism and Anabolism
Things to Remember
- Metabolism is a term that refers to the chemical reactions or rates at which the body consumes calories to maintain the cells' and organism's living state.
- Anabolism and catabolism are two subcategories of metabolism.
- Catabolism is the breakdown of big or complex molecules like proteins, polysaccharides, and fats into little molecules like amino acids, monosaccharides, and fatty acids, which is a subdivision of metabolism.
- Catabolism is a metabolic condition that is destructive in nature. Glycolysis and the citric acid cycle are both involved in this process.
- Another subcategory of metabolism is anabolism, which aids in the formation of molecules from smaller units. It is a chemical process in which nutrients are used to produce relatively complex molecules in living cells with considerably simpler structures. This process requires energy in the form of ATP to produce cell components such as proteins, carbohydrates, and lipids.
- Anabolism is a buildup feature of metabolism, whereas catabolism is a breakdown feature. It is also called Biosynthesis.
- Proteins, nucleic acids, and polysaccharides are all made up of macromolecules, and anabolism aids in their construction. These macromolecules are made from small molecules with the help of enzymes and non-protein chemical compounds essential for enzyme activity.
Previous Years Questions
- According to fluid mosaic model, plasma membrane is….[NEET 1998]
- Acetabularia used in Hammerling's nucleocytoplasmic...[NEET 1988]
- All types of plastids possess essentially….[NEET 1992]
- An outer covering membrane is absent over….[NEET 1992]
- Balbiani rings are the sites of...[NEET 1993]
- the Golgi apparatus is also concerned with the...[NEET 1994]
- Biological organisation starts with….[NEET 2007]
- A bivalent consists of...[NEET 1989]
- A cell organelle containing hydrolytic enzymes is...[NEET 2016]
- Water soluble pigments found in plant cell vacuoles….[NEET 2016]
- Which of the following are not membrane - bound?….[NEET 2015]
- Electron microscope has a high resolution power…. [NEET 1990]
- Flagella of prokaryotic and eukaryotic cells….[NEET 2004]
- A major site for synthesis of lipids is….[NEET 2013]
- which one of the following colours of light so as to….[NEET 2005]
Sample Questions
Ques. What Impact Do These Two Processes Have on the Human Body? (2 marks)
Ans. This technique has the exact opposite effect on the human body. Catabolism is the breakdown of calories and lipids. It also generates energy from the meals placed into a cell. Anabolism, on the other hand, preserves and furnishes tissues while also increasing muscular mass.
Ques. In the Krebs cycle, what is the catabolic and anabolic function? (2 marks)
Ans. The Krebs cycle has a variety of reversible processes. It consumes acetyl-CoA and generates NADH, co2, proton, and other compounds when cycling clockwise. It is called catabolism. Citrate can be collected and then fluxed out of mitochondria, resulting in the production of fatty acids. And oxaloacetate is a crucial step in the gluconeogenesis process. Anabolism is the term for those processes.
Ques. What happens when an organism's anabolism outnumbers its catabolism? (2 marks)
Ans. When an organism's anabolism outnumbers its catabolism, the organism grows in size overall. Humans up to the age of 30 show this type of growth. If the opposite occurs, the organism is said to be degrowth. Individuals above the age of 30 are more likely to have negative growth.
Ques. Is it true that all enzymes are catabolic? (3 marks)
Ans. Catabolic processes are typically energy-releasing, whereas anabolic reactions are typically energy-demanding. Both reactions necessitate the use of enzymes. Some enzymes are involved in catabolic activities, while others are involved in both catabolic and anabolic processes.
Many enzymatic reactions use energy even if they are part of the catabolic route, hence enzymes cannot be classed as catabolic or anabolic enzymes. Phosphofructokinase I, for example, is a glycolytic enzyme that transforms Fructose 6 Phosphate to Fructose 1,6 bisphosphate by transferring phosphate from ATP to Fructose 6 Phosphate and then using the energy obtained from ATP dephosphorylation.
Ques. What is a substrate's function in carbohydrate catabolism? (3 marks)
Ans. The goal of biochemical reactions is to maintain life by providing material to develop cells and enable the organism to operate. The energy from the oxidation of glucose to CO2 and H2O is used to do this. What is sometimes overlooked in this reaction is the significant amount of energy released. Biochemical responses, on the other hand, are aware of this energy. They collect this through a sequence of steps involving energy-rich molecules that culminate in ATP, which is needed by the organism to perform labor. Everything ends up as heat in the end, but the effort is extracted first. A substrate is a chemical molecule that is part of the reaction chain starting with glucose; it is used as a shortcut to follow the relevant reactants using a partially balanced equation. Along the chain, it is the main reactant that produces another main reactant. A substance that is acted upon by an enzyme is also referred to as an enzyme substrate. This isn't to say that equations don't have to be balanced; everything must be considered in every reaction.
Ques. Is photosynthesis a photochemical or a catabolic process? (3 marks)
Ans. It is an anabolic process, meaning it makes complex molecules out of simple ones. It is a photochemical process as well. The photosynthesis of carbohydrates in plants from CO2 and H2O, in which chlorophyll, the green colouring matter of plants, functions as a photosensitizer, is the most important photochemical reaction and the most striking example of PHOTOSENSITIZATION. In the visible zone, neither CO2 nor H2O absorbs any radiation, but chlorophyll does. It absorbs visible light with wavelengths ranging from 400 to 700 nm. Chlorophyll absorbs light energy, which is passed to CO2 and H2O molecules, which then react to produce glucose.
Ques. In terms of fitness, what is a catabolic state? (3 marks)
Ans. Our body is in a catabolic condition, which means it is breaking down its tissue. Our bodies tear down muscle in a catabolic condition, converting protein to amino acids and lipids to fatty acids. A catabolic state is a term used in fitness and bodybuilding to describe the state in which our bodies break down muscle into amino acids. This is not a good thing because those who compete in bodybuilding want to gain muscle, therefore breaking down muscle tissue is counterproductive to their goals. The anabolic state is the opposite of catabolism, in which your body builds complex organic compounds from simpler ones. Muscle, for example, is made up of amino acids.
Ques. Is it true that vitamin supplements are catabolic? (2 marks)
Ans. Many fat-soluble vitamins are only carried through the body by proteins that act as carriers. Food’s high in fat-soluble vitamins is consumed. Stomach acid breaks down the meal, which then passes to the small intestine, where it is further broken down. Bile is required for fat-soluble vitamin absorption.
Ques. What exactly is lipolysis? (3 marks)
Ans: The breakdown of triglycerides to provide energy is known as lipolysis. Triacylglycerol (TAG), which is contained in cellular lipid droplets, is hydrolyzed, resulting in non-esterified fatty acids. These non-esterified fatty acids are then used as a source of energy, as critical precursors for lipid and membrane formation, or as mediators in cell signalling pathways. Hydrolysis breaks down lipids or triglycerides into free fatty acids and glycerol. The resulting glycerol is then used in glycolysis, while the fatty acids are further broken down by beta-oxidation to release acetyl-CoA. The citric acid cycle relies on acetyl Co-A is a major component.
Ques. What is glycolysis? (3 marks)
Ans. Glycolysis is the catabolic process that all eukaryotic cells go through. In aerobic conditions, glucose is broken down or lysed to pyruvic acid, but in anaerobic situations, glucose is converted to lactic acid. The Embden-Meyerhof Pathway is another name for anaerobic glycolysis (EMP). The brain uses aerobic glycolysis, whereas RBCs use anaerobic glycolysis due to the lack of mitochondria. The Rapaport-Lumbering cycle is another name for this cycle in RBCs. In human muscles, glycolysis is started by the breakdown of glycogen.
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