The molecular clock theory proposes that senescence occurs because _____.
a. telomeres capping the ends of chromosomes become shorter with each cell division and their loss eventually stops the chromosomes from replicating
b. mistakes in the replication of cells or buildup of damaging byproducts from biologic processes eventually destroy the organism
c. unstable oxygen, formed normally during metabolism, can damage cells by initiating reactions that break down cell membranes
d. fast-paced living shortens one's lifespan
e. the genetic code directs cells to divide a certain number of times during their life span
Question 2
A patient is newly diagnosed with diverticulosis and voices concern about future complications. What is the nurse's most appropriate response?
a. Follow a low-fiber diet.
b. Follow a high-fiber diet.
c. Avoid nuts, popcorn, and foods with seeds.
d. Drink plenty of fluids.
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Molecular model of homologous recombination in meiosis