Homework Sourse8 Which of the following statements does not identify a cont
8) Which of the following statements does not identify a contribution to genetic variation during reproduction?
11) Particluar receptor tyrosine kinases (RTKs) that promote excessive cell division are found at high levels on various cancer cells. A protein, Herceptin, has been found to bind to a RTK known as HER2. HER2 is sometimes excessive in cancer cells. This information can now be utilized in breast cancer treatment in breast cancer treatment if Which of the following is true?
12) Some cells have several nuclei per cell. How could such multinucleated cells be explained?
PLEASE LEAVE AN EXPLANATION FOR THE CORRECT ANSWER
Solution
7. After 5 divisons, the number of cells would be 16. As we start with one cell and end after 5 divisions mitotic divisions, we will have 1x2x2x2x2 = 16 cells. At the end of each division, we will have double the number of cells.
8. C, because there is not creation of new genes.
11. B, because then we can establish a correlation between HER2 and cancer and proceed to treatment using HER2 levels.
12. A. Mitosis has occured because there is a large number of nuclei. Cytokinesis failed to occur as the cell bodies failed to cleave. All the nuclei are thus in once cell.
