An enzyme is needed for the Krebs Cycle. It will be made following the directions contained in a gene of one of the __29__ found in the __30__ of the cell. A portion of the double strand of __31__ splits apart between the weak__32__bonds holding the bases together. This portion contains the code for building the enzyme. The code message begins with a triplet call a _33__ , followed by the code, then signals the end with a triplet called the _34__. The DNA is composed of groups of three molecules called __35__ . They are made up of ribose __36__, a __37___ for additional support, and a nitrogenous __38___. These match up with complementary ones on the opposite strand of DNA. A cytosine will pair up with __39___. An RNA uracil will pair up with __40___ on the DNA. When they line up and join, a __41__ RNA strand is formed. This process of copying the code into RNA is called __42__. The RNA will move out to the cytoplasm, to an organelle called a __43__. There, __44___ RNA molecules will each pick up their respective __45___ that are floating in the cytoplasm and bring them into line next to the first RNA binding them to codons on the RNA copy. As they join, a __46__ is formed. This part of the process is called __47__.
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