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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

  1. (a) Draw the structural formula for the sugar β-D-ribose.
  2. (b) Draw the structural formula for the nucleoside adenosine (it consists of β-D-ribose and adenine).
  3. (c) Draw the structural formula for the nucleotide adenosine 5'-monophosphate.

(a)

Interpretation Introduction

Interpretation:

The structural formula for the sugar has to be drawn.

Concept introduction: Carbohydrates are defined as the polyhydroxy aldehyde or ketone or any compound that can be hydrolyzed to them. Ribose is an example of monosaccharide sugar and has a molecular formula C5H10O5. It is also called pentose sugar as it contains five carbon atoms and forms a five-membered ring structure - 4 carbon atoms and 1 oxygen atom.

There are five nitrogenous bases adenine, guanine, thymine, cytosine and uracil. A sugar unit attached to the base and a phosphate group together form a nucleotide unit. They are the main building block of nucleic acids DNA and RNA.

Explanation

Ribose is a monosaccharide sugar with formula C5H10O5. The open structure of ribose is,

The hydroxyl group on the lower most carbon (C-4) is present on right side of the chain thus named as D sugar. It undergoes ring formation such that the hydroxyl group present at C-4 is converted into ether linkage with C-1 forming a 5 membered ring. While ring formation the groups on the right side of the ring are placed below the plane and those on left are placed above the plane of the ring.

(b)

Interpretation Introduction

Interpretation:

The structural formula for nucleoside adenosine has to be drawn.

Concept introduction: Carbohydrates are defined as the polyhydroxy aldehyde or ketone or any compound that can be hydrolyzed to them. Ribose is an example of monosaccharide sugar and has a molecular formula C5H10O5. It is also called pentose sugar as it contains five carbon atoms and forms a five-membered ring structure - 4 carbon atoms and 1 oxygen atom.

There are five nitrogenous bases adenine, guanine, thymine, cytosine and uracil. A sugar unit attached to the base and a phosphate group together form a nucleotide unit. They are the main building block of nucleic acids DNA and RNA.

(c)

Interpretation Introduction

Interpretation:

The structural formula for nucleotide adenosine 5'-monophosphate has to be drawn.

Concept introduction: Carbohydrates are defined as the polyhydroxy aldehyde or ketone or any compound that can be hydrolyzed to them. Ribose is an example of monosaccharide sugar and has a molecular formula C5H10O5. It is also called pentose sugar as it contains five carbon atoms and forms a five-membered ring structure - 4 carbon atoms and 1 oxygen atom.

There are five nitrogenous bases adenine, guanine, thymine, cytosine and uracil. A sugar unit attached to the base and a phosphate group together form a nucleotide unit. They are the main building block of nucleic acids DNA and RNA.

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