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26 Cards in this Set
- Front
- Back
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Chromosomes are made of what?
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proteins and DNA
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What is the name of the material that determines inherited characteristics
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deoxyribonulceic acid
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What are the subunits that make up DNA called?
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nucleotides
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What two things must DNA be able to do?
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make copies of itself / control cell functions
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why must DNA be able to be copied
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to make new cells
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Scientists were suprised about how much the DNA molecules could do because they thought only---------molecules could give instructions and be copied during cell division
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complex
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what three things is a nucleotide made of?
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sugar, phosphate and base
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What are the four bases of a nucleotide?
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adenine, thymine, guanine, and cytosine
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what four letters stand for the four types of bases?
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c, g, t, a
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According to Chargaff's rules, the amount of guanine always equals the amount of
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cytosine
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According to Chargaff's rules the amount of-----always equals the amount of thymine
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adnine
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Rolasind Franklin used a process known as ------ to make images of DNA molecules
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x- ray diffraction
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what shape did Franklin's images show?
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spiral
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What did James Watson and Francis
Crick's model of DNA look like? |
twisted ladder
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what two things did this model eventually help explain
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how it is copied and how it functions in the cell
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The twisted ladder of DNA is called a?
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double helix
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What moleculs form the sides of the ladder?
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sugar and phosphate
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What are the rungs of the DNA ladder made of?
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pair of bases
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pairs of adenine are what?
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thymine
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pairs of guanine are what?
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cytosine
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How did the double helix structure match Chargaff's observations?
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making bases were always present in equal amounts
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the pairing of bases allows the cell to --------- or make copies of DNA
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replicate
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Both sides of a DNA molecule are
------, binding only with their match |
complimentary
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where is a molecule split during relication?
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nucleotides are added to each which cause a new and old molecule
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how often is DNA copied?
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everytime the cell divides
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what in the cell that helps with unwinding, copying, and rewinding the DNA
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proteins
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