Answer the following question given this paragraph: Learn to balanced simple redox reactions by inspection. Learn to balance complex redox reactions by the half reaction method. Use the solvent, or parts of it, as a reactant or a product in balancing a redox reaction. Balancing simple redox reactions can be a straightforward matter of going back and forth between products and reactants. For example, in the redox reaction of Na and Cl2:. Q: Redox reactions, like other chemical reactions, begin with a product and end with what? Choices: - plasma - decomposition - stimulant - reactant A:
reactant
(Question)
Answer the following question given this paragraph: Mass is independent of location, while weight depends on location. Q: What is a factor in determining weight but not mass? Choices: - function - material - gravity - location A:
(Answer)
location
Ques: Answer the following question given this paragraph: Microfilaments Of the three types of protein fibers in the cytoskeleton, microfilaments are the narrowest. They function in cellular movement, have a diameter of about 7 nm, and are made of two intertwined strands of a globular protein called actin (Figure 4.23). For this reason, microfilaments are also known as actin filaments. Q: What type of protein fibers in the cytoskeleton are the narrowest? Choices: - macrophages - mitosis - capillaries - microfilaments A:
Ans: microfilaments
(Q).
Answer the following question given this paragraph: Though viruses are not considered living, they share two important traits with living organisms. They have genetic material like all cells do (though they are not made of cells), and they can evolve. The genetic material of a virus can change (mutate), altering the traits of the virus. As the process of evolution has resulted in all life on the planet today, the classification of viruses has been controversial. It calls into question the very definition of life. Q: Though viruses are not considered living, they share two important traits with living organisms: they have genetic material and they can undergo what process? Choices: - generation - sexual reproduction - learning - evolution A:
(A).
evolution
Ques:Answer the following question given this paragraph: Enzymes Enzymes, catalysts that occur naturally in living organisms, are almost all protein molecules with typical molecular masses of 20,000100,000 amu. Some are homogeneous catalysts that react in aqueous solution within a cellular compartment of an organism. Others are heterogeneous catalysts embedded within the membranes that separate cells and cellular compartments from their surroundings. The reactant in an enzyme-catalyzed reaction is called a substrate. Because enzymes can increase reaction rates by enormous factors (up to 10 17 times the uncatalyzed rate) and tend to be very specific, typically producing only a single product in quantitative yield, they are the focus of active research. At the same time, enzymes are usually expensive to obtain, they often cease functioning at temperatures greater than 37C, have limited stability in solution, and have such high specificity that they are confined to turning one particular set of reactants into one particular product. This means that separate processes using different enzymes must be developed for chemically similar reactions, which is time-consuming and expensive. Thus far, enzymes have found only limited industrial applications, although they are used as ingredients in laundry detergents, contact lens cleaners, and meat tenderizers. The enzymes in these applications tend to be proteases, which are able to cleave the amide bonds that hold amino acids together in proteins. Meat tenderizers, for example, contain a protease called papain, which is isolated from papaya juice. It cleaves some of the long, fibrous protein molecules that make inexpensive cuts of beef tough, producing a piece of meat that is more tender. Some insects, like the bombadier beetle, carry an enzyme capable of catalyzing the decomposition of hydrogen peroxide to water (Figure 14.28 "A Catalytic Defense Mechanism"). Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction by binding to a specific portion of an enzyme and thus slowing or preventing a... Q: What are the catalysts that occur naturally in living organisms and are primarily protein molecules? Choices: - carbohydrates - hormones - acids - enzymes A:

Ans:enzymes
Answer the following question given this paragraph: Only hurricanes cause more damage than earthquakes. Only one source of earthquake damage is ground shaking. More damage may be done from the tsunami, fires, and landslides that can happen afterwards. Communities along faults can prepare for earthquakes. One way is to use earthquake-safe construction methods and to make older buildings stronger. If you live in earthquake country, it is important to secure heavy objects and put together an emergency kit. Q: What is the only natural phenomenon that causes more damage than earthquakes? Choices: - volcanos - blizzards - landslides - hurricanes A:
hurricanes