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7Sci Chapter 16 Sec1

Genes & DNA - What does DNA look like?

What letters represent the four bases? A, T, G, C
Using x-ray diffraction, what did Rosalind Franklin show the shape of DNA to be? a spiral
What did Watson & Crick's DNA model look like? a long, twisted ladder
What are the sides of the DNA "ladder" made of? sugar and phosphate
What are the "rungs" of the DNA ladder? a pair of bases
When DNA is copied, where does the DNA molecule split? down the middle
DNA is made of subunits called what? nucleotides
What are nucleotides made of? a sugar, a phosphate and a base
Who discovered the amount of adenine in DNA always equals the amount of thymine? Erwin Chargoff
What scientist made images of DNA by using x-ray diffraction? Rosalind Franklin
What is the complementary strand to the DNA sequence TAGTCA? ATCAGT
Along with a sugar and a phosphate, what is the third part of a nucleotide? a base
What is the first step of DNA replication? a strand of DNA splits down the middle
Whose research indicated that the bases in DNA must match with each other in some regular pattern? Erin Chagraff
Who stated that the amount of cytosine in DNA is always equal to the amount of guanine? Erin Chagraff
What are the subunits in DNA composed of? nucleotides
Why do the pairs of bases match up? because they are complimentary
What does the pairing of bases allow cells to do? replicate
What base fits together with adenine? thymine
What base fits together with cytosine? guanine
The sides of the DNA ladder are formed in part by what? phosphate
How often is DNA copied? every time a cell divides
What are the four types of nucleotides? adenine, thymine, guanine and cytosine
What is DNA? the material that makes up genes and is found in all cells.
What does the statement "DNA unites all organisms" mean? DNA is found in the cells of the entire variety of organisms on Earth.
What happens after a DNA strand splits down the middle for replication? New nucleotides attach to the exposed bases of both sides, and two identical strands of DNA are formed.
What is another name for deoxyribonucleic acid? DNA
Created by: ndmsteach