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DNA Structure & Replication
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What is the first phase of Interphase and what is happening in the cell?
G1 - the cell is growing to maturity
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What is happening to a cell that goes into the G 0 phase?
Nothing. It is resting. It is not growing, preparing to divide, or dividing.
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Why does a cell have to duplicate its DNA?
So the new daughter cells will have the same amount of DNA as the parent cell.
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What is the small structural unit that makes up a strand of DNA?
Nucleotide
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What are the 3 parts of a nucleotide?
Phosphate, Deoxyribose Sugar, Nitrogen Base
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When does DNA replicate in the cell cycle?
S-phase of Interphase
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What are the 2 main phases of the cell cycle
Interphase and Mitosis
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How many different types of nucleotides make up DNA?
4
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Helicase "unzips" the DNA strand to start DNA replication. What type of biomolecule is helicase? (Be specific)
Protein (enzyme)
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True/False The Phosphate molecule in a nucleotide contains the element Phosphorus (P).
True
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What phase does the cell spend most of its time in?
Interphase
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Another term for cell division is ____.
Mitosis
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True/False The nitrogenous bases in nucleotides contain the element Nitrogen.
True
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What 2 parts of a nucleotide do ALL nucleotides have in common?
Phosphate and Sugar molecule
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What are the complementary base pairs?
A-T and C-G
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