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DNA Structure & Replication
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What are the 2 main phases of the cell cycle
Interphase and Mitosis
What phase does the cell spend most of its time in?
Interphase
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.
What is the first phase of Interphase and what is happening in the cell?
G1 - the cell is growing to maturity
When does DNA replicate in the cell cycle?
S-phase of Interphase
Helicase "unzips" the DNA strand to start DNA replication. What type of biomolecule is helicase? (Be specific)
Protein (enzyme)
What is the small structural unit that makes up a strand of DNA?
Nucleotide
What are the 3 parts of a nucleotide?
Phosphate, Deoxyribose Sugar, Nitrogen Base
How many different types of nucleotides make up DNA?
4
What are the complementary base pairs?
A-T and C-G
What 2 parts of a nucleotide do ALL nucleotides have in common?
Phosphate and Sugar molecule
True/False The Phosphate molecule in a nucleotide contains the element Phosphorus (P).
True
True/False The nitrogenous bases in nucleotides contain the element Nitrogen.
True
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.
Another term for cell division is ____.
Mitosis


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