CYCLE PHASES rep and tissue repair. The dividing cells proceed through three pha
ID: 201319 • Letter: C
Question
CYCLE PHASES rep and tissue repair. The dividing cells proceed through three phases of a cut, the cell cycle as shown in the figure. When a person cells secrete a protein called epidermal growth factor EGF. Epidermal (akin) cells in the vicinity of the injury possess proteins membranes called epidermal growth factor receptors in their cell (a) Identify the THREE major stages of interphase, and describe the sequence in which they b) Describe the most likely occur role of EGF and the role of EGFR in a onse to cell signaling pathway Describe how the cellular resp EGF results in tissue repair (c) In cases of skin cancer that are associated with overproduction of EGFR, treatment with antibodies against extracellular EGFR has been Propose a model to explain how the antibody therapy most likely interferes with the cell sign pathway, and give ONE reason the therapy is effective for treating cancerExplanation / Answer
a)G1, S, and G2 are the 3 stages of interphase.
G1 is the time between cell birth and DNA replication. during this tme cell growth happens cell and also synthesise the protein required for mitosis.Each chromosome contains only one DNA.
Sphase: synthesise phase,during which synthesis of DNA happens that is replication. aFter the completion of S phase there will be two chromatids.
G2 phase:After S phase cell enters the G2 phase,its another growth phase in which organels such as mitochondria grow and divide.Cell stock up energy for mitosis, it is the final stage before mitosis