Answer the following question given this paragraph: An enzyme is a protein that acts as a biological catalyst. Recall that a catalyst is a substance that increases the rate of a chemical reaction without itself being consumed in the reaction. Cellular processes consist of many chemical reactions that must occur quickly in order for the cell to function properly. Enzymes catalyze most of the chemical reactions that occur in a cell. A substrate is the molecule or molecules on which the enzyme acts. In the urease catalyzed reaction above, urea is the substrate. The Figure below diagrams a typical enzymatic reaction. Q: What term is used to describe a protein that acts as a biological catalyst? Choices: - nucleus - protein - heterozygote - enzyme A:
enzyme
Answer the following question given this paragraph: The structure of a chloroplast shows how membrane and molecular architecture helps life processes. A chloroplast consists of thylakoid membranes surrounded by stroma. The thylakoids stack on top of each other, like a stack of pancakes. The thylakoid stacks arrange chlorophyll, accessory pigment molecules, and photosynthetic proteins to capture sunlight and allow a concentration of ions within the sacs. You can see the green color of the chlorophyll. You cannot see the electron carriers, sequenced within the sac membranes, but their arrangement helps harvest small amounts of energy from excited electrons. The thylakoid membranes contain molecules of the green pigment chlorophyll. Q: Thylakoid membranes contain molecules of what green pigment used in photosynthesis? Choices: - carbonate - sodium - copper - chlorophyll A:
chlorophyll
Q: Answer the following question given this paragraph: Egg production takes place in the ovaries. It occurs in several steps:. Q: Where in the female body does egg production take place? Choices: - testes - uterus - endometrium - ovaries A:
A: ovaries
Question: Answer the following question given this paragraph: The organisms are bacteria called Salmonella. If the word Salmonella rings a bell, that's probably because Salmonella causes human diseases such as food poisoning. Many other types of bacteria also cause human diseases. But not all bacteria are harmful to people. In fact, we could not survive without many of the trillions of bacteria that live in or on the human body. You will learn why when you read this chapter. Q: Which disease does the bacteria salmonella cause in humans? Choices: - water poisioning - blood poisoning - skin poisoning - food poisoning A:
Answer: food poisoning
*Question*
Answer the following question given this paragraph: An atomic bomb explodes and generates a huge mushroom cloud. The tremendous energy released when the bomb explodes is incredibly destructive. Where does all the energy come from? The answer is the nucleus of the atom. Q: Where does the energy from an atomic bomb come from? Choices: - isotope of atom - electron shell - neutron - nucleus of atom A:
**Answer**
nucleus of atom
Answer the following question given this paragraph: This teakettle is made of aluminum except for its handle, which is made of plastic. Aluminum is a good conductor of heat. It conducts heat from the flames on the range to the water inside the kettle, so the water heats quickly. Plastic, on the other hand, is not a good conductor of heat. It stays cool enough to touch even when the rest of the teakettle becomes very hot. Q: Why wouldn't a teakettle have an aluminum handle? Choices: - it absorbs light - it isn't washable - it is magnetic - it conducts heat A:
it conducts heat