Question: Q: What are the proteins called that speed up biochemical reactions in cells? Choices: - peptides - hormones - carbohydrates - enzymes A:
Answer: enzymes

Question: Q: Antibiotics can cure most infections that are caused by what? Choices: - bacterium - algae - bile - bacteria A:
Answer: bacteria

Question: Q: Which type of galaxies contain very little gas and dust, are red to yellow in color, contain over a trillion stars and have mostly old stars? Choices: - blue elliptical galaxies - giant orbital galaxies - giant gaseous galaxies - giant elliptical galaxies A:
Answer:
giant elliptical galaxies