Q: Answer the following question given this paragraph: Solution The charges, as well as the atoms, must balance in reactions. The silver atom is being oxidized from the 0 oxidation state to the 1+ state. Whenever something loses electrons, something must also gain electrons (be reduced) to balance the equation. Oxygen is a good oxidizing agent for these reactions because it can gain electrons to go from the 0 oxidation state to the 2 state. Q: When something loses electrons, it must also? A:

OPTIONS:
- reduce protons
- slow down
- gain protons
- gain electrons

A: gain electrons

Q: Answer the following question given this paragraph: The only completely effective way to prevent infection with STIs is to avoid sexual contact and other risky behaviors. Using condoms can lower the risk of becoming infected with STIs during some types of sexual activity. However, condoms are not foolproof. Pathogens may be present on areas of the body not covered by condoms. Condoms can also break or be used incorrectly. Q: What is the only way to completely avoid stis? A:

OPTIONS:
- cover your mouth
- oral sex
- contraceptive use
- avoid sexual contact

A: avoid sexual contact

Q: Answer the following question given this paragraph: The amniotic egg is an important adaptation in fully terrestrial vertebrates. It first evolved in reptiles. The shells of reptile eggs are either hard or leathery. Q: What type of eggs do fully terrestrial vertebrates carry? A:

OPTIONS:
- epithelial
- amphibious
- aqueous
- amniotic

A: amniotic

Q: Answer the following question given this paragraph: The active site is specific for the reactants of the biochemical reaction the enzyme catalyzes. Similar to puzzle pieces fitting together, the active site can only bind certain substrates. Q: The active site can only bind certain what? A:

OPTIONS:
- electrons
- membranes
- proteins
- substrates

A:
substrates