1. How does sexual reproduction compare to DNA transfers inprokaryotes?
I. Both increase genetic diversity.
II. Sexual reproduction results in greater evolutionarychange.
III. DNA transfer in prokaryotes allows for fewer errors andmutations.
a. I only
b. I and II
c. I and III
d. I, II, and III
2. What type of receptor is described in the followingparagraph?
Binding of a signaling molecule to this type of receptor uses anenzyme to remove a phosphate group from an ATP molecule to activateanother receptor. The activated receptor can be recognized by relayproteins inside the cell, which bind to the receptor and changeshape. These activated proteins then trigger a transduction pathwaythat leads to some sort of cellular response.
a. intracellular receptor
b. ligand-gated ion channel
c. g protein-coupled receptor
d. receptor tyrosine kinase
3. Yeast cells, plant cells, and mammal cells all share manysimilarities in cell signaling. This provides evidence that
a. cell-signaling mechanisms are only found in organisms that usemethods of sexual reproduction
b. intercellular communication evolved as a way for multicellularorganisms to coordinate cell functions
c. eukaryotic cells use signal transduction pathways whileprokaryotic cells use a more primitive form of signaling
d. signal transduction pathways appeared in cells before theevolution of multicellular organisms