input with options: Answer the following question given this paragraph: The trp Operon: A Repressor Operon Bacteria such as E. coli need amino acids to survive. Tryptophan is one such amino acid that E. coli can ingest from the environment. coli can also synthesize tryptophan using enzymes that are encoded by five genes. These five genes are next to each other in what is called the tryptophan (trp) operon (Figure 16.3). If tryptophan is present in the environment, then E. coli does not need to synthesize it and the switch controlling the activation of the genes in the trp operon is switched off. However, when tryptophan availability is low, the switch controlling the operon is turned on, transcription is initiated, the genes are expressed, and tryptophan is synthesized. Q: E. coli need what kind of acids to survive? A:
OPTIONS:
- hydrochloric
- bacterial
- boric
- amino
output: amino

input with options: Answer the following question given this paragraph: The electric current is measured in coulombs per second. A flow of one coulomb per second is called one ampere, A, of current. Q: A flow of one coulomb per second is called one ampere, which is a measure of what? A:
OPTIONS:
- Direct current
- powered current
- performance current
- electric current
output: electric current

input with options: Answer the following question given this paragraph: An ionic bond is the force of attraction that holds together oppositely charged ions. Ionic bonds form crystals instead of molecules. Table salt contains ionic bonds. Q: What term means the force of attraction that holds together oppositely charged ions? A:
OPTIONS:
- electron bond
- magnetic bond
- solvent bond
- ionic bond
output: ionic bond

input with options: Answer the following question given this paragraph: CRITICAL THINKING QUESTIONS 19. How are neurons similar to other cells? How are they unique? 20. Multiple sclerosis causes demyelination of axons in the brain and spinal cord. Why is this problematic?. Q: The existence of (virtual) photons is possible only by virtue of the heisenberg uncertainty principle and can travel an unlimited distance, so the range ofthe electromagnetic for is what? A:
OPTIONS:
- finite
- simple
- generated
- infinite
output:
infinite