Ques: Q: In order to survive and maintain what state, an organism must quickly adapt to changing environmental conditions? Read this paragraph and choose the correct option from the provided answers: In prokaryotes, a combination of activators and repressors determines whether a gene is transcribed. As you know, prokaryotic organisms are fairly simple organisms with much less DNA. Prokaryotic genes are arranged in operons , a region of DNA with a promoter, an operator , and one or more genes that encode proteins needed to perform a certain task. To maintain homeostasis (and survive), the organism must quickly adapt changing environmental conditions. The regulation of transcription plays a key role in this process. Choices: - ketosis - acclimatization - regulation - homeostasis A:
Ans: homeostasis

Ques: Q: Enzymes are a type of what, and as such, they are not reactants in the reactions they control? Read this paragraph and choose the correct option from the provided answers: Like other catalysts, enzymes are not reactants in the reactions they control. They help the reactants interact but are not used up in the reactions. Instead, they may be used over and over again. Unlike other catalysts, enzymes are usually highly specific for particular chemical reactions. They generally catalyze only one or a few types of reactions. Choices: - hormone - metabolite - neurotransmitter - catalyst A:
Ans: catalyst

Ques: Q: What kind of reaction, in general, keeps stars shining? Read this paragraph and choose the correct option from the provided answers: The energy from fusion reactions keeps the star shining. Choices: - magnetism - fission - evolution - fusion A:
Ans: fusion

Ques: Q: How many calories of energy does one gram of sugar or starch provide? Read this paragraph and choose the correct option from the provided answers: Carbohydrates include sugars, starches, and fiber. Sugars and starches are used by the body for energy. One gram of sugar or starch provides 4 Calories of energy. Fiber doesn't provide energy, but it is needed for other uses. At age 13 years, you need about 130 grams of carbohydrates a day. Figure below shows good food sources of each type. Choices: - 5 - 3 - 10 - 4 A:
Ans:
4