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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 kind of substance is chitin?

Chitin is a polysaccharide that is made up of many monosaccharides.

In this case, the monosaccharide subunits are N-acetyl-D-glucosamine.

What type of movement is due to pressure gradient?

Fluid movement, such as air or water, is primarily driven by pressure gradients. A higher pressure in one area will push fluid towards an area of lower pressure, creating movement in the process. This is known as flow from high pressure to low pressure.

Why do you think plants and animals carry out cellular respiration?

It tis the process in the mitochondrion of a cell where water and other other molecules react with oxygen to create ATP. ATP is like food for the cell and is essential for the life processes of the cell.

State one other factor apart from temperature that will affect the rate of reaction of amylase?

pH levels can also significantly impact the rate of reaction of amylase. Amylase functions optimally at specific pH levels, so a change in pH can alter the enzyme's activity and affect the rate of reaction.

What will happen to the black bass and blue gill as the floor of the ponds fills with organic debris?

The whole biological process will become disrupted, breaking the food chain. As the pond bottom fills, the fish have less room for their territory, so they go to take another fishies territory. it becomes a huge battle for survival. And after all that is done.....there is nothing but pond, and some micro-organisms.

Are glucose and fructose both monosaccharides?

Maltose and sucrose are examples of disaccharides. Glucose, galactose, and fructose are all examples of monosaccharides.

The energy contained in organic molecules is a form of what kind of energy?

The energy contained in organic molecules is a form of chemical energy. This energy is stored within the bonds of molecules and can be released through chemical reactions, such as cellular respiration, to fuel various biological processes.

Where does energy used to transport molecules across a membrane from?

The energy used to transport molecules across a membrane comes primarily from the hydrolysis of ATP (adenosine triphosphate) molecules. This process, often mediated by membrane proteins such as transporters and pumps, allows cells to regulate the movement of substances in and out of the cell against their concentration gradients.

Do proteins serve as enzymes?

Yes, many proteins function as enzymes that catalyze biochemical reactions in the body. Enzymes are specialized proteins that speed up chemical reactions by lowering the activation energy required for the reaction to occur.

Is it true cooking in a pressure cooker preserves vitamins and nutrients?

Scientists from Norway have proved that cooking with pressure slows the molecules that normally speed up during normal cooking. Since this slowing occurs it doesn't knock around the nutrients as much as normal cooking does and therefore locks in the nutrients and the freshness. It has also been shown that Palaeolithic Man sat on his food while cooking for this very reason. Though it is believed he would have "burned his biscuits", scientists believe contributed directly to our evolution.

How is sugar stored in your body?

When you consume sugar, your body converts it into glucose, which is then either used for immediate energy or stored as glycogen in the liver and muscles for later use. If there is excess glucose, it is converted into fat and stored in fat cells for long-term energy reserves.

Glycogen is made of?

Glycogen is made of glucose molecules linked together in branching chains through alpha-1,4-glycosidic bonds and alpha-1,6-glycosidic bonds. It is the primary form of stored carbohydrate in animals and is mainly found in the liver and muscles. Glycogen serves as a readily available energy source when glucose levels in the body are low.

Why distilled water can use to dilute acetic acid while the acetic acid is an organic acid?

Acetic Acid: CH3COOH tells us the strucuture.

http://z.about.com/d/chemistry/1/0/f/m/aceticacid.jpg

As CH3 is separate from the Carboxide polyatomic anion ( [COOH]- ) it is going to remain unchanged. As we know that COOH has disassociation of an H in water, to form [H3O]++[COO]-. H3O is an acid according to the Lewis, the Arrhenius, and the Bronsted Theories. Therefore, as an acid ionizes in water (to form a cation in aqueous solution and an anion in aqueous solution) it does not matter that acetic acid is organic, because it dilutes all the same.

Rule of thumb: ALL acids ionize in water to form (coefficient)[Cation]X1+(aq)+(coefficient)[Anion]X2-(aq).

Which is hotter moist heat or dry heat?

Moist heat is generally more effective at transferring heat to the body compared to dry heat. This is because water has a higher heat capacity than air, allowing it to retain more heat and transfer it to the body more efficiently. However, personal preferences for heat sensations may vary.

How do freshwater planarian react in salt water?

Freshwater planarians are sensitive to changes in salinity, and exposure to saltwater can be harmful to them. They would likely exhibit signs of stress, such as altered movement patterns, increased mucus production, and potential damage to their tissues. Prolonged exposure to saltwater can be detrimental to their survival.

When highly acidic chyme enters duodenum which hormone stimulates release of pancreatic secretion?

When highly acidic chyme enters the duodenum, the hormone secretin is released. Secretin stimulates the pancreas to release bicarbonate-rich fluids to neutralize the acidity of chyme coming from the stomach.

When water leaves a plant cell the osmotic pressure will increase of decrease?

When water leaves a plant cell, the osmotic pressure inside the cell will increase because there will be a higher concentration of solutes relative to water. This increase in osmotic pressure leads to plasmolysis, where the cell membrane shrinks away from the cell wall.

To test wether a sample contains proteins what reagent should be used?

The Bradford reagent (Coomassie) is commonly used to detect if a sample contains protein. Coomassie will react with aromatic amino acids (phenylalanine, tyrosine and tryptophan) to turn from a dull red color to a bright blue color. This assay is dependant on the amount of aromatic amino acids present, but works well as a "quick and dirty" indicator of the presence of a protein. The bicinchonic acid assay (BCA assay), while more expensive than the Bradford assay, more accurately detects the presence of the peptide bond present in proteins, so it can be used to not only detect proteins which lack aromatic amino acid residues, but also can be used to more accurately determine the concentration of protein in a sample as not all proteins have the same amount of aromatic amino acids.

What are the working principles of potentiometry?

Potentiometers work by having a resistive element inside. Both end terminals are attached to it, and do not move. The wiper travels along the strip when the knob is turned. The closer the wiper is to the end terminal it is wired in conjunction with, the less the resistance, because the path of the current will be shorter. The further away it moves from the terminal, the greater the resistance will be.

The symbol for a potentiometer is the same one as a resistor, save for an arrow in the middle. In a circuit where they are used strictly as variable resistors or rheostats, only two terminals are wired to the other components. All three terminals are wired separately when they function as voltage dividers. Light dimmers in houses and volume controls on electronics are two common applications. Others include switches and position sensors

Is stearic acid and stearoyl CoA the same thing?

Stearic acid is a saturated fatty acid 18 carbons long. Stearoyl CoA is a molecule of stearic acid bound to the molecule coenzyme A (CoA), which occurs during the metabolism of stearic acid to release energy, so they are not the same thing.

What is the term for maikng new glucose?

The term for making new glucose is gluconeogenesis. This process occurs mostly in the liver and kidneys when the body needs to produce glucose from non-carbohydrate sources like amino acids and glycerol.

What is used to test for presence of polysaccharide?

Most likely the sucrose test.

what biologist use is the iodine test. Iodine is used to test for the presence of starch( a polysaccharide) any material containing starch always turn blue-black when iodine is added.

Are maltose and fructose enzymes?

No. The ose suffix means that these are simply molecules. For the most part this ose suffix is reserved for sugars (e.g. sucrose, glucose, lactose, etc.). The correct suffix that designates an enzyme is the ase suffix. Such as in DNA-polymerase, proteinase, and sucrase.

What are the amino acids in leaves?

The most common amino acids found in leaves are alanine, serine, glutamate, glutamine, and aspartate. These amino acids play important roles in plant metabolism, growth, and response to environmental stress.

What are the characteristics of organic compound?

consists of carbon atoms, hydrogen atoms, and functional groups

The main three types of organic compounds are carbohydrates, lipids, and proteins. (per Memmler's stucture & function of the human body 9th edition.)