#Question id: 11752
#Unit 7. System Physiology – Animal
Which of the following substances enhances the sensitivity of pain receptors but does not directly excite them?
#Question id: 11543
#Unit 7. System Physiology – Animal
Hormone X activates the cAMP second messenger system in its target cells. The greatest response by a target cell would come from ________.
#Question id: 8776
#Unit 9. Diversity of Life Forms
What kind of evidence has recently made it necessary to assign the prokaryotes to either of two different domains, rather than assigning all prokaryotes to the same kingdom?
#Question id: 224
#Unit 1. Molecules and their Interaction Relevant to Biology
Which type of atom is involved in the reactive center of lipoamide?
#Question id: 3687
#Unit 3. Fundamental Processes
As the two strands of the double helix are separated, the positive supercoiling interferes with the further unwinding of DNA. Which of the following enzyme makes a break in a strand of DNA to release the supercoiling and facilitate the replication to occur?