Problem: OPTIONS:
- concentration of repressor protein
- binding of expressor protein
- the addition of water
- nonbinding of repressor protein
Q: Q: When lactose is present in the cell, what allows the lac genes to be expressed? A:
Answer: nonbinding of repressor protein

Problem:OPTIONS:
- spring waves
- spring floods
- spring storms
- spring tides

Q: What occurs during the new moon and full moon, due to gravitational pull? A:
****
A: spring tides

Q: Physical and chemical properties of geometric isomers are generally what? A:
OPTIONS:
- round
- difficult
- similar
- different
different

Q: Alkynes are what type of compound? A:
OPTIONS:
- reversible hydrocarbons
- proteins hydrocarbons
- Split Hydrocarbons
- unsaturated hydrocarbons

Answer: unsaturated hydrocarbons

Question: Q: What are two ways cnidarians are able to reproduce? A:
OPTIONS:
- mitosis and meiosis
- spawning and sexual
- internally and externally
- asexually and sexually
Answer: asexually and sexually

input: OPTIONS:
- helium
- nitrogen
- carbon
- oxygen Now, answer this question: Q: Boron only occurs naturally in compounds with what element? A:
A:
output:
oxygen