Ricardo - Assignment 1 (21-30) BCS2085.docx

Ricardo - Assignment 1 (21-30) BCS2085.docx - 21 Explain...

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21. Explain the role of DNA and RNA in the process of protein synthesis. During the process of protein synthesis, the genetic code within DNA is used to help identify which proteins make within the cytoplasm of a cell. However, the DNA is too large to leave the nucleus of a cell so it must copy its genetic code through a process known as transcription into a messenger RNA. The messenger RNA will take this information from the nucleus to the cytoplasm. The next process is translation, where the genetic information will be translated to the language of amino acids which is the building blocks of protein. Transfer RNA now must bind a free amino acid to be added to a protein chain. 22. Provide a summary of the four primary tissues then select at least two of the 4 primary tissues and provide 2 differences and 2 similarities between them. The four primary tissues are epithelial, connective, nervous, and muscular. Epithelial tissue is composed of layers and tightly spaced cells. It provides covering and protection for organ surfaces and promotes secretion and absorption of materials. Connective tissue is the most abundant tissue in the body and it is comprised of more matrix then cell volume that binds and protect organs. It also provides support, movement, storage, and transportation. Nervous tissue consisted of excitable cells that communicate info to other cells. Muscular tissue is made of elongated muscle cells that allows for contractions. Even though the four primary tissues each serve a distinct purpose they also share some characteristics. During the early stages of human development, all tissues originated from three main layers known as the germ layers in an embryo. In the case of muscular and connective tissue, they both are derived from the middle layer known as the mesoderm. They both also contained blood vessels that provide the nutrients they need to carry out their daily functions. In fibrous connective tissue, the cells are called fibroblast because they produce protein fibers that binds organs. In contrast, muscular tissues contain elongated muscle cells known as myocytes that allows for contraction and movement. Connective tissue is very diverse and includes blood, bone, cartilage, fibrous and adipose tissue. Conversely, the three main muscle tissues are smooth, skeletal, and cardiac.
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