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DNA Structure

DNA structure and replication

What is DNA made of, and what does its structure look like? Nucleotides, niitrogen bases, deoxyribose sugar, phosphate, and hydrogen bonds, sugar-phosphate backbone. It looks like a double helix.
What are the 4 nitrogen bases? Adenine, thymine, cytosine, and guanine
Which bases pair with each other? Adenine pairs with thymine. Cytosine pairs with guanine.
When/why do cells need to make more DNA? When cells are lost during injury/illness, during pregnancy, during puberty, during the production of gametes.
What does 'semiconservative' mean? Cells produce identical DNA molecules with with one old strand and one new strand. Semi=half, conservative=save to restore
What are the steps to DNA replication? 1. Unwind the DNA.2. Add on the complementary base pairs. 3. Seal the strands together and reseal the DNA.
Created by: zoewatkins
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