0
The main difference between the two is that one is hydrophilic and the other is hydrophobic. This means that amino acid (peptide) hormoes cannot travel across the cellular membrane to activate genes; they must bind to receptors on the surface and activate second messenger systems. Steroid hormones, on the other hand, can travel right across membranes and affect genes directly.
What else can I help you with?
Can amino acid models easily join to for protein molecule?
Yes, amino acid models can easily join together to form a protein molecule through peptide bond formation. Each amino acid has a carboxyl group and an amino group that can react together to form a peptide bond, linking one amino acid to the next in a protein chain. This process continues until a long chain of amino acids forms a complete protein molecule.
Why does albumin and pepsin test positive for protein?
Albumin and pepsin test positive for protein because they are proteins themselves. Proteins can be detected using various biochemical tests that target specific protein characteristics, such as their amino acid sequences or ability to react with certain reagents.
Do Major hormones circulate to virtually all tissues?
Yes, all hormones are released into the blood stream and then circulate to all tissues; only those target tissues that are designed to react to specific hormones will react to the presence of the hormone. Hormones are chemical messengers that are released into the blood stream, designed to cause changes in only certain tissues.
Why egg albumin and casein did not react ninhydrin reagent?
It should react to this reagent. However it must be HEATED before it will react.This is due to the fact that when Ninhydrin is heated it stabilizes and the reacts with the -NH2 groups on the amino acid.
Are all amino acids reactive with the Biuret reagent?
Not all amino acids react with the Biuret reagent. The Biuret test specifically detects the presence of peptide bonds, which are formed when amino acids link together in proteins. Therefore, free amino acids without peptide bonds do not produce a color change with the Biuret reagent. However, when amino acids are part of a polypeptide or protein, they will react positively with the Biuret test.
What is a target organ?
A target organ is an organ that is targeted by a drug or hormone. These drugs usually stimulate the organ to produce its own hormones or react positively and function in response to the drug, such as adrenaline to the heart.
How does bases react to proteins?
Bases can react with proteins by accepting hydrogen ions from amino acid side chains, which can lead to changes in the protein's structure and function. This can disrupt hydrogen bonding interactions within the protein and potentially affect its overall stability and activity.
Why ninhydrin shows positive test for amino acid and protein?
Ninhydrin reacts with ammonia, a primary amine, or a secondary amine (amino acids have a primary or alpha amino group, except for proline which has a secondary amino group). They all turn purple/blue right away upon heating with ninhydrin.Remember that a protein has a amino terminal and a -COOH terminal. The ninhydrin will react with the amino terminal giving a very light blue or violet color (more often than not you will see no color change). Upon further heating you may notice an increase in the intensity of the blue/violet. this is due to the heat denaturing the protein, thereby exposing more -NH2 groups for the ninhydrin reagent to react with
What are the component of amino acid?
The 20 amino acids vary in structure by the R-group, otherwise all amino acids are the same in structure. All amino acids have a carboxyl group, an amino group, an R-group, and a hydrogen which are all bonded to a central carbon. It is the R-groups that make the amino acids react in different ways and alter the structure of the protein.
What is the product of the dehydration synthesis of 2 amino acid molecules is a molecule that consists of two amino acids bonded together?
The product of the dehydration synthesis of 2 amino acids is a dipeptide. During dehydration synthesis, a water molecule is removed as the amino groups of two amino acids react, forming a peptide bond between them.
How do hormones send messages?
Hormones are chemical messengers produced by endocrine glands and released into the bloodstream. They travel through the body and bind to specific receptors on target cells, triggering a response. This can influence processes such as growth and development, metabolism, and stress response.
Why biuret regent react with single amino acid?
The biuret reagent should not react with a single amino acid. The reagent reacts when there is a peptide bond linking amino acids together. If you are seeing the biuret reagent react in the presence of a single amino acid, then there must be some amino acids that are still linked together.
