Q:

Are DNA and RNA polymers composed of monomers?

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Quick Answer

Both DNA and RNA polymers are composed of monomers. These monomers are called nucleotides. A nucleotide has four parts; however, the monomers of DNA and RNA differ slightly from each other, thus giving the molecules different structures and functions.

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Full Answer

A nucleotide comprises a phosphate group, a five-carbon sugar and a nitrogenous base. The five-carbon sugar in DNA is deoxyribose whereas the sugar in RNA is ribose. Four different nitrogenous bases make up DNA and RNA, but the bases differ slightly. In DNA, the bases are adenine, thymine, cytosine and guanine; in RNA, the bases are the same except that uracil replaces thymine. Adenine and guanine are called purines; thymine, cytosine and uracil are pyrimidines.

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Related Questions

  • Q:

    How are DNA and RNA similar?

    A:

    Both DNA and RNA are macromolecules that consist of long chains of nucleotides. Both contain the specific nucleotide bases adenine, guanine and cytosine, although the fourth base differs between DNA and RNA. Both molecules are found in the cell's nucleus, but RNA may also be found in the cytoplasm.

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  • Q:

    Why do we need DNA?

    A:

    Without DNA, life would not be able to perpetuate itself. DNA is needed as it is the blueprint of life. Every species of plants and animals contains a genetic substance called DNA that passes on the physical characteristics of an organism from one generation to the next.

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  • Q:

    How is RNA different from DNA?

    A:

    RNA, or ribonucleic acid, is responsible for the transfer of genetic information to cell components called ribosomes. DNA, or deoxyribonucleic acid, is responsible for the transfer and duplication of long-term genetic information during cell reproduction. They are both essential to the process of creating new organisms and the biological functions of organisms.

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  • Q:

    What is RNA made of?

    A:

    Ribonucleic acid, known as RNA, is composed of a combination of four different nucleotides: adenine, uracil, guanine and cytosine. Each nucleotide primarily consists of a ribose sugar (five-carbon ring) and a phosphate group.

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