1. protein phosphorylation is an example of "covalent modification" of proteins. however, it is not understood what enzymes catalyze phosphorylation nor is the importance of phosphorylation well understood. 2. the peptide "backbone" consists of repetitive "units" of amino group nitrogen-alpha carbon-carbonyl carbon, moving from the n-terminus to the c-terminus.

after making a punnet square using bv bv bv bv you will find that the ratio will be 9: 7 or a 128.6% probability.

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the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.

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