Patho Mid term Chamberlain nr507| 257 Questions| With Complete Solutions

Housekeeping genes are vital to the function and maintenance of all the body's cells. What characteristic is associated with these genes? correct answer: D. They are transcriptionally active. Mutations in the encoding of histones modifying proteins have been shown to influence the development of what congenial condition correct answer: Heart disease Signals to change or modify epigenetic tags are ... from where? correct answer: Signals come from inside the cell, from neighboring cells or the environment During which stage of human development does the role of epigenetics have the greatest impact on the development of epigenetic abnormalities correct answer: A. In utero The difference between DNA sequence mutations and epigenetic modifications is? correct answer: Epigenetic modifications are REVERSIBLE Explain the characteristics of totipotent stem cells and the sources of it correct answer: Totipotent cells are cells that can mature into any type of body cell in an organism including the cells that make up the placenta in mammals. Totipotent cells are only present in mammals in the first few cell divisions of an embryo. Give 2 examples of totipotent cells correct answer: A zygote Cells in the early embyro up to 5 days