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22 Cards in this Set
- Front
- Back
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Proteins are made of ______ which are bonded together by _______ bonds. |
1. Amino Acids 2. Peptide |
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How many amino acids exist ? |
20 |
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DNA is a coiled _______ helix |
double helix |
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What contains instructions for making proteins . |
DNA |
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When the cell is not dividing DNA appears as |
Chromatin |
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Who discovered the DNA structure and was able to make a model ? |
Watson and Crick |
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Pentose is attached to the _______ groups by _______ bonds. |
1.Phosphate 2. Phosphodiester |
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Pentose sugar for DNA is called |
Deoxyribose |
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Purines |
Double carbon nitrogen rings which include adenine (A), and guanine (G) |
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Pyrimidines |
Single carbon nitrogen rings which include thymine (T) and cytosine (C) |
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Sub units of DNA |
Nucleotides |
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3 parts of a Nucleotide |
Phosphate , Deoxyribose sugar, a nitrogen base |
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Amount A=T and C=G in DNA |
Chargaff's rule |
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What is DNA Replication ? |
Process in which DNA makes a copy of itself |
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Where does DNA replication take place? |
in the S phase of interphase |
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DNA helicase |
unwinds DNA , also puts back in Helix shape |
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DNA polymerase |
Elongates DNA in 5' -> 3' direction Proofreads for base mistakes |
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DNA Ligase |
glues the okazaki fragments in overall 5' -. 3' direction |
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RNA Primer |
Initates DNA replication |
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What causes the leading and lagging strands ? |
Antiparallel sugar phosphate backbone |
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Leading strand |
completed in one piece _______ |
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Lagging strand |
made in sections called okazaki fragments ---------- |
