Which of the following statements concerning the D- and L- forms of a monosaccharide is incorrect? O They are enantiomers. All of the choices are correct O They must contain the same number of chiral centers. They have structures that are nonsuperimposable mirror images of each other.
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- In the following list, identify the carbohydrate, the fatty acid, the amino acid, and the polypeptide: a. NH2CHRCOOH b. C6H12O6 c. (methionine)20 d. CH3(CH2)16COOHAre the x and β forms of monosaccharides enantiomers of each other? Why or why not?Sphingolipids can contain of all of the following except O Glycerol O more than one choice O phosphate O a mono- or oligosaccharide O sphingosine.
- Which of these statements about the tertiary structure of a polypeptide is(are) untrue? You may select more than one answer. The tertiary structure will be maintained when the solvent is changed from pure water to aqueous acetic acid. O The tertiary structure is determined in part by the formation of disulfide bridges. Hydrogen bonding interactions are responsible for formation of secondary structure but not tertiary structure, O The tertiary structure is rigid and unchanging. O Charge-charge (electrostatic) interactions can be important in the tertiary structure.Amino acids are the building blocks for proteins in the cell. The structures of the amino acids glutamate (or glutamic acid), glycine, and leucine are provided below in the same order from left to right. Map any chiral centers with a 1.Identify the name of each of the structures of sugar and identify as reducing or nonreducing sugar. One of the structures may be not identified from the usual structures of disaccharides. Kindly answer a, b, c, and d.You only identify the name of each structure of sugars and identify as reducing or nonreducing sugar. No explanation needed.
- Can you please identify the name of each of the structures of sugar and identify as reducing or nonreducing sugar of a,b,c and d? The picture is posted. One of the structures may be not identified from the usual structures of disaccharides.In the following monosaccharide hemiacetal, identify the anomeric carbon atom. Identify the appropriate atom by selecting an atom and assigning it a map number of 1. To do this, rigl mark to enable the Map field before entering a value. H: 122 EXP" CONT. 0 0 H но OH S Br OH [1] ÓH P. -The structure of D-galactose differs from that of D-talose at which carbon atom? carbon #2 O carbon #3 carbon #4 carbon #5
- The ring structure of the carbohydrate glucose is provided below. Map any chiral centers with a 1.Consider the following statements: (1) The term sugar is a general designation for both monosaccharides and disaccharides. (2) The "penultimate carbon" in a monosaccharide is used to determine D- or L-configuration. (3) Sucrose is a reducing sugar and lactose is a nonreducing sugar. O Two of the three statements are true. All three statements are true. O Only one of the statements is true. None of the statements are true.H OH CH2OH D H ОН H الحزن ОН CH2OH ОН H ОН I Which of the following statements correctly describes this structure? (A) The monomer units are bonded by beta 1-2 glycosidic linkage. B The monomer units are bonded by alpha 1-2 glycosidic linkage. The monomer units are bonded by alpha 1-4 glycosidic linkage. The monomer units are bonded by beta 1-4 glycosidic linkage. H CH2OH H ОН H ОН H ОН