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Biochemistry

Biochemistry is the study of the structure, composition and chemical processes in all living organisms. It covers the structures and functions of various cellular components, including proteins, carbohydrates, nucleic acids, lipids, and other biomolecules.

8,065 Questions

What is the definition of negative feedback?

(Biology) Mechanism of the homeostatic response by which the out put of a system suppresses or inhibits activity of the system: Eg- when a certain blood concentration of a hormone is reached, the endocrine gland releasing the hormone is inhibited by the presence of the hormone.
feedback is often use in electronic ckt like amplifiers............

feedback is process of sampling a part of the output{apmlified} signaland applying it back tothe input via network by using capacitors inductors etc but mostly resistors.........called feedback loop..

it is of two types.....positive feedback and negative feedbach....

in positive feedback output gain is increases as output signal is in ssame phase with input signal whereas in negative feedback output gain decreases as output signal is in opposite phase with input signal........

In what process are carrier proteins important?

Carrier proteins is important in facilitated diffusion. Facilitated diffusion transports molecules from one area of higher concentration on one side of the membrane to an area of lower concentration on the other side .Because the molecules are moving down their concentration gradient , facilitated diffusion is passive transport.

What are three main parts of cell theory?

the three main ideas of cell theory is all organisms are made up of one or more cells, all cells come from existing cells, and the cell is the basic unit of all organisms.

What enzyme hydrolyzes sucrose?

Sucrose provides energy in living organisms. It is a simple sugar however, so it has drawbacks in the human diet. When eaten in excess it can lead to weight gain and subsequently other health problems.

What is required for glycolysis to take place?

Glycolysis is the metabolic pathway that converts glucose Glycolysis is a determined sequence of ten enzyme-catalyzed reactions. The intermediates provide entry points to glycolysis. In order for glycolysis to proceed it will need oxygen and energy.

What type of chemical bond holds together the backbone of a strand of DNA?

Covalent bonds between a sugar molecule (deoxyribose) and a phosphate group make up the backbone of DNA. These are very strong covalent bonds and are broken only with great expenditure of energy--x-rays, for example.

What is the relationship between nutrients and calories?

This is my guess, so correct me if I'm wrong. The food that is consumed contains nutrients, but in order to get those nutrients chemical reactions in the enzymes and proteins must break down the food. Once this happens, the body is able to make use of the nutrients. The nutrients then provide energy in the body.

Which hormone is responsible for acromegaly?

GH: growth hormone secreted by the pituitary gland located approximately behind the nose bridge which is prompted by the abnormal growth of a benign tumor which itself can also produce GH. The tumor can start growing anytime after puberty to the point of affecting eyesight by pushing against the optical nerve. The are many but very gradual visible signs of acromegaly. Most obvious are need for larger shoe size, outgrowing rings, bulging bones at the level of eyebrows, protruding jaw, etc Serious unseen effects are those on the cardiac system. According to available statistics, 98% of unchecked acromegaly sufferer do not live beyond 60 years old.

Since it is a relatively rare malady, it goes often unchecked by generalist.

Blood test can detect GH anomalies which can be confirmed by the tumor detected through MIR scanning.

Today's preferred treatment is surgical ablation of the tumor. Followed in some cases or proceeded or treated by a medical treatment: Sandostatin LAR, a monthly injection which may reduce the size of the tumor or hopefully when operating is not prescribed, keep the GH in check.

What form of tocopherol shows vitamin E activity in the human body?

Alpha-tocopherol is the form of tocopherol that exhibits vitamin E activity in the human body. It is the most biologically active form of vitamin E and is the form typically found in supplements and fortified foods.

How does a polysaccharide differ from a disaccharide?

A polysaccharide is a complex carbohydrate made up of multiple monosaccharide units linked together, while a disaccharide is made up of two monosaccharide units linked together. Polysaccharides are larger molecules and are used for energy storage and structural support, while disaccharides are smaller and are primarily used for energy transport.

What is the function of starch in animals?

Starch is a polysaccharide, thus it is made up of many molecules of monosaccharides (glucose). THis allows it to be consumed then reduced to glucose to provide energy for the organism. It is how plants store their energy.

How can acid rain affect the rate of photosynthesis?

Acid rain can affect the rate of photosynthesis by deceasing the pH of the soil. As acid rain contains weak sulfuric acid and many more different solvents therefore will decease the pH (8->6). Having the incorrect pH may kill some of the plants tissues therefore limits photosynthesis.

Which biological polymer consists of many simple monosaccharides joined together?

Polysaccharides are biological polymers that consist of many simple monosaccharides joined together. This process involves linking monosaccharide units via glycosidic bonds to form complex carbohydrates like starch, cellulose, and glycogen. These polysaccharides serve as energy storage molecules and structural components in living organisms.

Would glucose solution produce a positive Benedicts test?

No, Benedicts reagent will show positive results if the carbohydrate is a reducing sugar. You will know if it is positive if the sample will turn from blue to green then to orange when you are cooling the solution, which is the last step when you are performing the benedicts test for carbohydrates.

What is the difference between digestive enzymes and papaya enzymes?

Digestive enzymes are natural substances produced by the body to help break down food for absorption. Papaya enzymes specifically refer to a type of enzyme found in papaya fruit called papain, which can also aid in digestion by breaking down proteins. While both can support digestion, papaya enzymes are derived from papaya fruit, whereas digestive enzymes can come from various sources and assist in breaking down different types of nutrients.

Which vitamin is needed to synthesize nonessential amino acids from essential amino acids?

Vitamin C is needed to synthesize nonessentail amino acids from essential amino acids.

Do enzymes produce proteins?

Enzyme are not producing proteins but they catalyses the steps in proteins synthesis. Proteins are produced in ribosomes by amino acids and RNA molecules such as tRNA and mRNA. Enzyme such as peptidyl synthetase catalyse the prptide bond formation between amino acids.

What are complementary proteins?

Complementary proteins are two or more proteins that, when combined, provide all essential amino acids needed by the body. By combining different plant-based protein sources, such as rice and beans or hummus and whole grain pita, you can ensure you are getting a complete protein profile.

Are anabolic pathways spontaneous?

You would expect a catabolic reaction to be spontaneous because this type of reaction involves the release of energy. You would expect reactions that require energy (anabolic reactions) not to be spontaneous due to the need for an input of energy.

What is gnrh hormone?

GnRH (Gonadotropin-releasing hormone) is a hormone produced by the hypothalamus in the brain. It regulates the production and release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) from the pituitary gland, which in turn control the release of sex hormones from the ovaries and testes. GnRH plays a crucial role in the regulation of reproductive functions in both males and females.

What is HBlg?

I'm not sure what "HBlg" refers to. Could you please provide more context or clarify your question?

What kind of vitamin you get in eye?

Vitamin A helps protect the surface of the eye (cornea), it is essential for good vision.

Studies show vitamin A eye drops are effective for the treatment of dry eyes. In fact, one study found that over-the-counter lubricating eye drops containing vitamin A were as effective for the treatment of dry eye syndrome as more expensive prescription eye drops formulated for dry eye relief.

Vitamin A eye drops also have been shown effective for the treatment of a specific type of eye inflammation called superior limbic keratoconjunctivitis.

Vitamin A, at least when in combination with other antioxidant vitamins, also appears to play a role in decreasing the risk of macular degeneration (AMD). In the landmark Age-Related Eye Disease Study (AREDS) sponsored by the National Eye Institute, people at high risk for the disease who took a daily multiple vitamin that included vitamin A (as beta carotene), vitamin C, vitamin E, zinc and copper had a 25 percent reduced risk of advanced AMD during a six-year period.

It also appears that a combination of vitamin A and lutein may prolong vision in people suffering from retinitis pigmentosa (RP). A recent four-year study conducted by researchers from Harvard Medical School and other prominent universities found that individuals with retinitis pigmentosa who took daily supplements of vitamin A (15,000 IU) and lutein (12 mg) had a slower loss of peripheral vision than those who did not take the combined supplements.

Because beta carotene is converted into vitamin A in the body, it's likely beta carotene (provitamin A) offers similar eye benefits as the pre-formed retinol type of vitamin A, though more research is needed to confirm this.

What general type of reagent might the body use to regenerate vitamin C that was lost in a cooked vegetable?

The body might use reducing agents, such as glutathione or NADH, to regenerate vitamin C that was lost in a cooked vegetable. These compounds have the ability to convert the oxidized form of vitamin C (dehydroascorbic acid) back to its active reduced form (ascorbic acid).

Can children take maru-man enzyme?

It is not recommended for children to take maru-man enzyme without consulting a healthcare professional first. Children have different nutritional needs and sensitivities compared to adults, so it is important to get proper guidance before giving them any supplements.

The largest group of hormones?

The largest group of hormones is the peptide hormones, which include proteins, glycoproteins, and small peptides. These hormones are made up of chains of amino acids and are produced in various organs including the pituitary gland, pancreas, and adrenal glands. Peptide hormones act by binding to specific receptors on target cells to trigger a cellular response.