11. Examine these two monosaccharides and answer the following questions. Which monosaccharide is found in DNA, and which is found in RNA? Circle the key difference that distinguishes between the two monosaccharides. Use arrows to point to the areas where other groups bond to make them into nucleotides.

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 11. Examine these two monosaccharides and answer the following questions.

  1. Which monosaccharide is found in DNA, and which is found in RNA?
  2. Circle the key difference that distinguishes between the two monosaccharides.
  3. Use arrows to point to the areas where other groups bond to make them into nucleotides
answers: 

A. Which monosaccharide is found in DNA, and which is found in RNA?

Ribose is used in RNA and deoxyribose is used in DNA.

B. Circle the key difference that distinguishes between the two monosaccharides.

The difference between glucose and fructose is as follows:-

Glucose

Fructose

It is a six-membered ring.It is a five-membered ring
It is an aldohexose sugar.It is a type of sugar called ketohexose.
It is also referred to as grape sugar or blood sugar.It is also referred to as fruit sugar.
A pyranose ring structure is formed.A furan ring structure is formed.

The open structure of glucose is as follows:-

The open structure of fructose is as follows:-

Cyclic structure of glucose

Cyclic structure of fructose


C. Use arrows to point to the areas where other groups  bond to make them into nucleotides.

A nucleotide is the basic building block of nucleic acids (RNA and DNA). A nucleotide consists of a sugar molecule (either ribose in RNA or deoxyribose in DNA) attached to a phosphate group and a nitrogen-containing base. The bases used in DNA are adenine (A), cytosine (C), guanine (G) and thymine (T). In RNA, the base uracil (U) takes the place of thymine. DNA and RNA molecules are polymers made up of long chains of nucleotides.




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