Ion-linked gated channels are receptor proteins through which ions pass. a cell biologist has blocked these channels in a lab rats liver tissue by using a chemical that:

Which of the following is an example of a tissue on the digestive system a.the stomach b.smooth muscle that lines the stomach c.nerve cells in the stomach d. enzyme molecules in the stomach

Genetic disorders can result when sister chromatids fail to seperate properly. during what phase is this problem most likely to occur?

What does polymerase chain reaction (pcr) do? o a. separates dna fragments by size o b. cuts a dna sample into fragments o c. provides an overall picture of a person's chromosomes o d. makes more copies of a sample of dna