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14 Cards in this Set
- Front
- Back
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DNA is short for ____________
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deoxyribonucleic acid
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Where in all organisms are DNA molecules found?
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in the cells mainly within the nucleus
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DNA contains ________ that determines the cell's _________ and __________and is formed into a _________ which can be described as a twisted ladder
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genetic information, structure, function, double helix
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Human nuclei contain how many DNA molecules?
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46
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What do DNA strands coil tightly around?
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histones
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In non dividing cells, the coiled DNA forms a tangled network called ______
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chromatin
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What are chromosomes?
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super coiled structures of DNA which divide during cell division
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What are genes and what do they contain?
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sections of DNA strand which contain the genetic code that stores information to determine the structure and activity of the cell
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Each DNA strand consists of two ______ of alternating ______ and ______. Pairs of ______ bases forming cross links between the two strands. _______ attached to _______ molecules and ________ link the _________ molecules
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backbones, sugars, phosphates, nitrogen, nitrogen, sugar, phosphate, sugar
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What is a nucleotide?
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sugar molecules and phosphate group bonded to a nitrogen base
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What are the four different nitrogen bases in a DNA molecule?
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Adenine (A)
Thymine (T) Cytosine (C) Guanine (G) |
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Which bases pair with each other?
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A - T
C - G |
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What replaces Thymine on an RNA strand? Does this pair with Adenine?
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Uracil (U), yes
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When cell is in interphase the 46 DNA molecules _______. Two linked chains of DNA _____, each separated section contains _______ the _______ information, each half acts as a template for the new ______ that will form. The new strand that forms is _________ to the first.
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replicate, unzip, half, genetic, nucleotides, identical
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