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How are nucleotides joined together to form the DNA chain?

Nucleotides are joined together by covalent bonds between the phosphate group of one nucleotide and the third carbon atom of the pentose sugar in the next nucleotide. This produces an alternating backbone of sugar – phosphate – sugar – phosphate all along the polynucleotide chain.

What type of Bonds holds the nucleotide chains of DNA together?

Each DNA molecule consists of two nucleotide chains wrapped around each other in a double helix and held together by hydrogen bonds. This hydrogen bonding involves only the nitrogenous bases.

Which linkage is proper for nucleotides?

phosphodiester bonds

How are nucleotides joined together in a strand of RNA?

Each strand is composed of nucleotides bonded together covalently between the phosphate group of one and the deoxyribose sugar of the next. The bonding causes the two strands to spiral around each other in a shape called a double helix. Ribonucleic acid (RNA) is a second nucleic acid found in cells.

What is a pentose?

: a monosaccharide C5H10O5 (such as ribose) that contains five carbon atoms in the molecule.

Is DNA a pentose?

Two types of pentose are found in nucleotides, deoxyribose (found in DNA) and ribose (found in RNA).

Is arabinose a pentose sugar?

Arabinose is an aldopentose – a monosaccharide containing five carbon atoms, and including an aldehyde (CHO) functional group. However, L-arabinose is in fact more common than D-arabinose in nature and is found in nature as a component of biopolymers such as hemicellulose and pectin.

What sugar is the C 3 Epimer of D Psicose?

Abstract. D-Psicose (D-ribo-2-hexulose), a C-3 epimer of D-fructose, is present in small quantities in commercial carbohydrate complexes or agricultural products.

Are L and D Epimers?

Glucose and galactose sugars are epimers. These two molecules are epimers, but because they are not mirrors, they are not enantiomers (the enantiomers have the same name but differ in D and L). They are also not anomer of sugar, because the wrong carbon is involved in stereochemistry.

What is the relationship between galactose and mannose?

Mannose and galactose are, like glucose, aldohexoses and can form six-membered rings. Mannose is an important part of the complex sugars, or oligosaccharides, that attach to proteins in the formation of glycoproteins. Galactose combines with glucose to form lactose or milk sugar.

What is the relationship between glucose and mannose?

Source: Pfanstiehl, Inc. Mannose is a C-2 epimer of glucose and a sugar monomer of the aldohexose series of carbohydrates. Mannose is important in human metabolism, particularly in the proper glycosylation of native proteins.

What is the difference between glucose and mannose?

As nouns the difference between glucose and mannose is that glucose is (carbohydrate) a simple monosaccharide (sugar) with a molecular formula of c6h12o6; it is a principle source of energy for cellular metabolism while mannose is (organic chemistry) a monosaccharide aldohexose found in manna and other legumes.