DNA Structure and Replication (Worksheet) – Flashcards
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What are the three parts of the nucleotide?
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Sugar, phosphate, base
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What kind of sugar is found in a nucleotide?
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Deoxyribose
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Which nucleotide component contains nitrogen?
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Bases
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Name the four nitrogen bases
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Guanine, Adenine, Thymine, and Cytosine
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What makes up the rungs of the "ladder"?
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Bases
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What makes up the backbone of the "ladder"?
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Sugar and phosphate
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What type of biological molecule is a DNA helicase?
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Enzyme
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What is the role of the DNA helicase in the replication of DNA?
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Unzips the DNA molecule
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What rule is used to join the free nucleotides to the exposed bases of the DNA?
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Complementary base pair rule
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Why is DNA replication called semi-ceonservative?
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Because half of it is original and half of it is new
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hydrogen bonds
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the two strands of dna that are held together with hydrogen bonds between the nitrogen bases
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double helix
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the strands of dna that form
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describe the replication of DNA
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1. hydrogen bonds between nucleotids break
2.strands of dna separate
3. free nucleotides are attracted to exposed bases on the loose strands of DNA
4. hydrogen bonds between nucleotides form
