DNA lab notes and worksheet Q&A’s
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why is DNA so important in biology?
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DNA holds our genetic information
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what is the function of DNA?
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to pass on its instructions to their offspring for reproduction
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what is one reason why humans and other animals need to have protein-cutting enzymes?
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to unwind and separate the DNA from the protein to begin the DNA replication process
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what are the 3 components of a nucleotide?
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phosphate group sugar base
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which component of each nucleotide accounts for the \"deoxyribo\" part of the name?
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the sugar accounts for this part
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the sugar of one nucleotide is bonded to the __ in the next nucleotide
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phosphate group
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the __ of the nucleotides in each strand of DNA extend toward each other in the center of the DNA double helix molecule
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bases
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what are the base-pairing rules
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A is always paired to T G is always paired to C
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why is DNA replication necessary before each cell division?
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to make two new molecules that will replace the old cells before cell division
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each new nucleotide added by the enzyme DNA __ matches the corresponding nucleotide in the old strand of DNA, in accord with the __ rules
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molecules base pairing
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which cells in your body contain DNA?
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somatic cells gametes
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why do these cells need DNA?
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so cells can function correctly and reproduce
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explain why you think meat spinach strawberries contain DNA Why does a fossil not contain DNA
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Fossil- it has been washed out by minerals meat- came from a living organism spinach- a plant and plants have cells that contain DNA strawberries- a living plant
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describe the function of DNA polymerase
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it helps make new strand of DNA by adding nucleotides one at a time
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explain why each part of the name DNA polymerase (DNA, polymer, -ase) makes sense
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-ase: an enzyme - so it catalyzes a chemical reaction polymer- means it catalyzes the formation of a polymer DNA- means the polymer whose formation it catalyzes is DNA - DNA is a polynucleotide
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the product of mitosis are
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2 genetically identical diploid daughter cells
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the product of meiosis are
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4 genetically different haploid cells
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which of the following functions is not properly method with the stage of mitosis where the function occur?
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DNA synthesis- prophase
