Which of the following four general statements is TRUE regarding this tetrapeptide?

Q: Cellulose and Chitin are very similar linear homopolysaccharides that have (β1-->4) linkages.…

A: Homopolysaccharides are chemical compounds that are composed of single monomer units which are…

Q: How many chiral centers are there in the open-chain form of glucose? In the cyclic form?

A: Chiral carbons are asymmetric carbon atoms that are attached to four different atoms. Each chiral…

Q: Using the tree structures for the following monosaccharides and comparing to that for glucose, draw…

A: Carbohydrates are polyhydroxy aldehydes or ketones. They can be classified as monosaccharides,…

Q: What is the name of the non-reducing monosaccharide found in the disaccharide shown here?

A: The sugars (or carbohydrates) that can be oxidized by the action of mild oxidizing agents, are known…

Q: What sugar is produced by the epimerization of galactose?

A: Sugars are defined as the sweet-tasting compounds that are present in various food sources such as…

Q: Consider the structure of the tripeptide (in its fully protonated form) below. H O H I | || + O=C…

A: The amino acids contain ionizable groups. The ionizable groups are of the following types: the amino…

Q: Naturally occurring D-glucose is one of a pair of enantiomers. Its mirror image is L-glucose. Draw…

A: An enantiomer is one of the two stereoisomer. They are mirror images that are non-superposable which…

Q: Draw all the possible tripeptides of serine, methionine, and glycine and name them.

A: The peptides that are made up of three amino acid sequence are termed tripeptides. These amino acids…

Q: What is the pH at which the tripeptide Gly-Ala-Gly has a net charge of 0?

A: The net charge of a peptide is calculated by adding the charges of amino and carboxy terminal of the…

Q: How many different tetrapeptides can form from four different amino acids?

A: Number of arrangements selecting 'n' items form a distinct items at a time = n!

Q: What is the structural difference between thymine and uracil?

A: The DNA and RNA are made up of long strands of nucleotides which are attached to each other by…

Q: What is the predominant form of each of the following amino acids at pH = 11? What is the overall…

A: In all amino acids at pH 11, carboxyl groups will be ionized, because all amino acids have a pI…

Q: What is the pI value for the dipeptide Gly-Ala?

A: The pI or isoelectric point is the pH value at which the molecule or the peptide carries no electric…

Q: (b) Account for the observation that the trans-,2-dibenzoylethylene appears yellow in color, whereas…

A: 1,2-dibenzoylethylene can exist in two forms, trans and cis due to lack of rotation about it's C-C…

Q: How many charged functional groups will be found on serine at physiological pH?

A: The chemistry of amino acids is complicated because there is a -NH2 group, which is a base and a…

Q: How many possible epimers of Dglucose exist?

A: D-glucose : It is a short form of dextrorotatory glucose. It is one of the two stereoisomers of…

Q: What are the structural differences between (a) purines and pyrimidines, and (b) ribose and…

A: a) Structural differences: [purines & pyrimidines]         The purines structure comprises of…

Q: Which four different bases can be bound to deoxyribose?

A: Nucleosides are a combination of a nitrogen base with pentose sugar. The nitrogen base combines with…

Q: Which form of aspartic acid in Problem 18.54 is the zwitterion? What is the pI for the zwitterion?

A: Zwitterion = At a particular pH, an amino acid carries both positive and negative charges and is…

Q: How many possible epimers of d-glucose exist?

A: Epimers are stereoisomers which have same molecular formula but differ in single chiral carbon atom…

Q: The endorphins are a group of naturally occurring neurotransmitters that act in a manner like…

A:

Q: What special purpose methionine serves

A: Methionine is referred to as an amino acid comprises of the sulphur group responsible for forming…

Q: Considering the formation of glycosidic linkages between monosaccharides, how many possible…

A: A monosaccharide is the simplest unit that can be obtained from the complete breakdown of a…

Q: What is the structural difference between the monosaccharides glucose and galactose?

A: Monosaccharides are the simple sugar, that can not be hydrolyzed. Monosaccharides have the general…

Q: Which amino alcohol is used in the synthesis of sphingomyelin?

A: Amino alcohol: It is a compound that contains both an Alcohol group (OH) and an Amine group.  It is…

Q: What are examples of polyiodides? Include their structure

A: Polyiodides are a class of polyatomic halide anions that consists entirely of iodine atoms. It is…

Q: Which of the following is the correct systematic name of the disaccharide shown? OH OH но но но- он…

A: Carbohydrates are composed of carbon, hydrogen, and oxygen in the ratio of 1:2:1. Carbohydrates act…

Q: A disaccharide that is found in dairy products can be formed by the two monosaccharides. Please draw…

A: The organic molecules known as carbohydrates are made up of three elements: carbon, hydrogen, and…

Q: Why "cellulose is composed of a long, branced chain of B-glucose subunits" is false?

A: Introduction Polysaccharides, also known as polycarbohydrates, are the most common type of…

Q: Draw the skeletal structure of the products formed when the given triacylglycerol is hydrolyzed with…

A: Triacylglycerol is a type of lipid. Triacylglycerols are composed of a glycerol molecule and three…

Q: Write the structure of UDP-N-acetylglucosamine and UDP-galactosamine.

A: UDP-N-acetyl (UDP-GalNAc) glucosamine and UDP-(GalNAc) galactosamine are the amino sugar of…

Q: Serine is an uncharged, polar amino acid (below and left). Threonine (below and right) is another…

A: Amino acids are the building blocks of proteins which are composed of amino group (NH3+), carboxyl…

Q: What is the structural difference between glucose and (a) β-D-glucuronate,(b) β-D-glucosamine, (c)…

A: Glucose is an aldohexose, it is a six-carbon sugar with a terminal aldehyde group

Nitrogen metabolism

Nitrogen metabolism is the synthesis, utilization or uptake, breakdown, and excretion of nitrogenous compounds in the body. The nitrogen metabolism encompasses nitrogen fixation, biosynthesis, and the breakdown of amino acids, purines, and pyrimidine. Since nitrogen-containing compounds are required for various life processes, nitrogen is an important element of life.