Dna Double Helix Worksheet

was first found in the nucleus. We now know that DNA is also found in organelles, the mitochondria and chloroplasts, though it is the DNA in the nucleus that actually controls the cell’s workings. In 1953, James Watson and Francis Crick established the structure of DNA. The structure is a double helix, which is like a twisted ladder. The sides …

DNA – The Double Helix Recall that the nucleus is a small spherical, dense body in a cell. It is often called the "control center" because it controls all the activities of the cell including cell reproduction, and heredity. Chromosomes are microscopic, threadlike strands composed of the chemical DNA (short for deoxyribonucleic acid).

DNA – The Double Helix . The DNA helix is actually made of repeating units called nucleotides. Each nucleotide consists of three molecules: a sugar (deoxyribose), a phosphate which links the sugars together, and then one of the four bases. Two of the bases are purines – adenine and guanine. The pyrimidines are thymine and cytosine. Note that the pyrimidines are single ringed …

DNA – The Double Helix, Coloring Worksheet DNA – The Double Helix 1. Why is the nucleus called the "control center" of the cell?__________________________________________ 2. What is a gene? …

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Created Date: 12/23/2015 7:06:16 AM

It is the DNA in the nucleus that actually controls the cell’s workings. _____ on chromosomes code for specific _____ in a cell. DNA is also found in _____ and _____. In 1953, James Watson. and . Francis Crick. established the structure of DNA. The shape of DNA is a double helix, which is like a twisted ladder. The sides of the ladder are made …

The shape of DNA is a double helix, which is like a twisted ladder. The sides of the ladder are made of alternating sugar and phosphate molecules. The sugar is a pentose called deoxyribose. Color all the phosphates pink (one is labeled with a "p"). Color all the deoxyribose sugars blue (one is labeled with a "D"). !1

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