Answer:
C. Stem Cell
Explanation:
Because a specialized tissue cell is a stem cell and cells that are already specialized cannot go back to being a stem cell.
Ice in the north pole have decresd in last few decaeds because of globle warming
Answer:
Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues.
Explanation:
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Lysozymes are under the enzymes-functional class of proteins. Enzymes are the ones responsible for the acceleration of chemical reactions. These are the macromolecular biological catalysts. <span> When we say enzymes, these are proteins which are directly related to the facilitation of the biochemical reactions. These include lactase and pepsin. You can usually hear these when learning about specialty diets or digestive medical conditions. Some of the examples of this protein’s presence are found in tears, human milk, saliva, and mucus. It is because of their ability to break down bacterial cell walls in order to protein improvement and nucleic extraction of efficiency make these lysozymes important </span>proteins<span> in living organisms. The gene responsible for the encoding of the lyzozome enzyme is called the LYZ gene.</span>
Answer:
The main function of the RB protein is to inhibit the transition from the G1 to S phase. Its activity depends on its phosphorylation state: if RB is not phosphorylated (active state), it is bound to the transcription factor E2F, preventing its translocation to the nucleus and the activation of genes necessary for DNA synthesis; and if it is phosphorylated, by cyclin-CDK complexes, E2F is released and cell proliferation occurs.
Explanation:
Retinoblastoma (Rb) was the first tumor suppressor described and, as we know today, mutations in its structure determine a large number of cancers. Structurally, we speak of a large and multifunctional protein; which is organized in different domains. The activity of this protein is regulated, mainly, by phosphorylation at multiple sites described over the years and is involved in control mechanisms of the cell cycle, apoptosis and senescence.
