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Chapter 2

Prokaryotic DNA is circular, naked, and found in the nucleoid region, while eukaryotic DNA is linear, associated with proteins, and located within the nucleus. A double stranded DNA molecule consists of two polynucleotide strands bonded together by hydrogen bonds between complementary nucleotide base pairs, with two hydrogen bonds between adenine and thymine and three between cytosine and guanine. DNA and RNA are both nucleic acids but differ in that DNA contains deoxyribose, is double stranded, and has thymine, while RNA contains ribose, is single stranded, and has uracil instead of thymine.

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75 views1 page

Chapter 2

Prokaryotic DNA is circular, naked, and found in the nucleoid region, while eukaryotic DNA is linear, associated with proteins, and located within the nucleus. A double stranded DNA molecule consists of two polynucleotide strands bonded together by hydrogen bonds between complementary nucleotide base pairs, with two hydrogen bonds between adenine and thymine and three between cytosine and guanine. DNA and RNA are both nucleic acids but differ in that DNA contains deoxyribose, is double stranded, and has thymine, while RNA contains ribose, is single stranded, and has uracil instead of thymine.

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Compare the DNA found in prokaryotic cells and eukaryotic cells

Prokaryotic Eukaryotic

Circular Linear

In nuclei region In nucleus

Naked Associated with proteins

Plasmid No plasmid

Draw a simple labeled diagram to show the structure of a double


stranded DNA molecule
- Hydrogen bonds and covalent bonds indicated
- 2 H-bonds between A-T and 3 H-bonds between C-G

Compare the structure and composition of DNA and RNA


- DNA and RNA are both nucleic acid
- Sugar in DNA is deoxyribose and sugar in RNA is ribose
- DNA is double stranded and RNA is single stranded
- DNA has a double helix
- DNA has Thymine whereas RNA has Uracil
- Both contain four nitrogenous bases

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