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9 Cards in this Set
- Front
- Back
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What does the majority of the DNA in the nucleus contain?
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repetitive sequences (which is used in DNA profiling)
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What is a purine? Which bases are are purines?
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purines are bases with 2 rings in their structure. Adenine and guanine are both purines
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What is a pyramidine? Which bases are pyramidines?
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Pyramidines are bases with 1 ring in their molecule structure.
Cytosine and Thymine are pyramidines |
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What are the three major components of DNA?
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Phosphate, sugar (deoxyribose), and base (C,T,G,A)
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Nucleosomes include DNA and ____________?
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8 histone proteins (DNA coils around the proteins)
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Only a small proportion of the DNA in the nucleus constitutes ____________ and the majority of DNA consists of repetitive sequences.
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genes
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what bonds hold purines and pyramidines together? (in other words, what type of bond holds the bases together?
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hydrogen bonds (which are easy to break open)
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The two strands have their 3' and 5' terminals at opposite ends- this means they are _________________
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anti-parallel
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Adjacent nucleotides are linked by a ond between the _______________ of one nucleotide and _______________________ of the other nucleotide
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1) phosphate group
2) carbon atom 3 |
