Answer the following question given this paragraph: A protein is an organic compound made up of small molecules called amino acids . There are 20 different amino acids commonly found in the proteins of living things. Small proteins may contain just a few hundred amino acids, whereas large proteins may contain thousands of amino acids. Q: What is an organic compound made up of small molecules called amino acids called? Choices: - a carbohydrate - a fat - a compound - a protein A:
a protein
(Question)
Answer the following question given this paragraph: The enzyme pepsin works only in the presence of acid. A strong acid is secreted into the stomach. It provides the acid that pepsin needs. You will learn about acids in the next chapter, "Chemistry of Solutions. " Vinegar and lemon juice are two common acids. Q: The enzyme pepsin works only in the presence of what? Choices: - carbohydrates - sodium - oxygen - acid A:
(Answer)
acid
Ques: Answer the following question given this paragraph: Solutions can also become supersaturated , where the amount of solute dissolved exceeds its solubility. Supersaturation most commonly occurs when a saturated solution is slowly cooled. They occur frequently in geological and meteorological processes. Supersaturated systems are unstable, and eventually, the solute will precipitate until a saturated solution is regenerated. We can quantify supersaturation by looking at solubility curves. If the ratio of solute to solvent is above the saturation curve at the given temperature, the solution is supersaturated. If it is on the curve, the solution is saturated, and if it is below the curve, the solution is unsaturated. Q: Solutions can also become supersaturated , where the amount of solute dissolved exceeds what? Choices: - part solubility - its dissolution - its concentration - its solubility A:
Ans: its solubility
(Q).
Answer the following question given this paragraph: How do you cool down a glass of room-temperature cola? You probably add ice cubes to it, as in the Figure below . You might think that the ice cools down the cola, but in fact, it works the other way around. The warm cola heats up the ice. Thermal energy from the warm cola is transferred to the much colder ice, causing it to melt. The cola loses thermal energy in the process, so its temperature falls. Q: What type of energy from a warm cola results in melting when it is transferred to the much colder ice? Choices: - protective energy - gaseous energy - cyclic energy - thermal energy A:
(A).
thermal energy
Ques:Answer the following question given this paragraph: Average velocity is displacement divided by time. Q: Displacement divided by time is equal to the average what? Choices: - force - speed - acceleration - velocity A:

Ans:velocity
Answer the following question given this paragraph: Like plants, algae contain chlorophyll and make food by photosynthesis. Q: How do plants and algae both make food? Choices: - atherosclerosis - spermatogenesis - Digestion. - photosynthesis A:
photosynthesis