Biology

Biology, 27.08.2019 14:30, doggielover36

Why might a dysfunctional gene affect one type of cell in the body, but not other types of cells?

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Biology, 29.06.2019 00:00, oglygbbjrapidd2851

The different types of cells in a body contain identical sets of dna molecules. however, the structures and functions of the cell types vary widely. gene expression describes the way in which genetic information is put into action in undifferentiated stem cells, making some cells, skin cells and others, muscle fibers. dna is first transcribed into mrna. the codons on the mrna specify the order in which amino acids are placed to form a protein. proteins, then play an important role in expressing an organism's physical traits. which of these factors does not play a significant role in cell differentiation? a) transcription factors bind to regulatory regions of a gene and affect their expression by turning genes off or on. b) certain segments of dna will be lost in the translation process, rendering certain genes obsolete in particular cells. c) certain genes can be turned on or off by the presence of concentration of transcription factors in the cytoplasm of the cell. d) the type and amount of rna may determine how a cell differentiates. the process of rna interference can even shut down targeted genes, affecting cell differentiation.

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Biology, 19.07.2019 00:10, Fauxfox

Determine if each description below applies to an oncogene, a proto-oncogene, or a tumor suppressor gene. some descriptions may apply to more than one of these gene types. drag the gene types on the left to the appropriate blanks on the right to match the descriptions. gene types can be used once, more than once, or not at all. - gene(s) that could code for a normal growth factor. - gene(s) whose presence can cause cancer. - type of gene(s) found in normal cells and cancer cells. - type of gene(s) found in cancer cells. - type of gene(s) found only in cancer cells. - gene(s) whose absence can cause cancer. - type of gene(s) found in normal cells.

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Biology, 31.07.2019 08:30, hayesgenniferozslxr

The different types of cells in a body contain identical sets of dna molecules. however, the structures and functions of the cell types vary widely. explain how the differences among various types of body cells arise from gene expression.

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Biology, 30.10.2019 15:31, brunovillarreal6576

Stem cells can form many kinds of cells. in contrast, most body cells cannot form different types of cells. for example, skin cells can only make skin cells and nerve cells can only make nerve cells. which statement best explains why skin cells will never become nerve cells? a.) each type of cell receives a different message from the central dna, which is stored in dna cells. b.) each type of cell has only the part of the dna necessary for making that type of cell. c.) each cell type is determined by messages sent from the brain, which directs development. d.) both types of cells have the same dna, bt the cells have different genes turned on resulting in a different type of cell.

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