Alaska Department of Education & Early Development Class 12 Science MCQs: Organization for Matter and Energy Flow in Organisms, Links Among Engineering, Technology, Science, and Society

Instructions. Answer all questions. Fill exactly one bubble per question on the OMR sheet.

1. Organization for Matter and Energy Flow in Organisms

   1.

   Which of the following processes directly converts light energy into chemical energy in plants?

   1. (A)

      Photosynthesis

   2. (B)

      Fermentation

   3. (C)

      Transpiration

   4. (D)

      Respiration

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   Answer: (A)

   Photosynthesis

   Organization for Matter and Energy Flow in Organisms · Easy

2. 2.

   In an ecosystem, what is the primary role of decomposers like bacteria and fungi?

   1. (A)

      To break down dead organic matter and recycle nutrients

   2. (B)

      To produce organic compounds from sunlight

   3. (C)

      To consume primary producers

   4. (D)

      To serve as a food source for apex predators

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   Answer: (A)

   To break down dead organic matter and recycle nutrients

   Organization for Matter and Energy Flow in Organisms · Medium

3. 3.

   Which of the following best describes the flow of energy in a food chain?

   1. (A)

      Producers → Decomposers → Consumers

   2. (B)

      Decomposers → Producers → Consumers

   3. (C)

      Consumers → Producers → Decomposers

   4. (D)

      Producers → Consumers → Decomposers

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   Answer: (D)

   Producers → Consumers → Decomposers

   Organization for Matter and Energy Flow in Organisms · Easy

4. 4.

   ATP (adenosine triphosphate) is crucial for cellular activities because it:

   1. (A)

      Directly transfers genetic information during reproduction

   2. (B)

      Provides readily available chemical energy for metabolic processes

   3. (C)

      Acts as a structural component of cell membranes

   4. (D)

      Stores large amounts of water for cell hydration

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   Answer: (B)

   Provides readily available chemical energy for metabolic processes

   Organization for Matter and Energy Flow in Organisms · Medium

5. 5.

   Consider a food web where grass is eaten by rabbits, rabbits are eaten by foxes, and foxes are also eaten by wolves. If the rabbit population suddenly declines due to disease, what is the most likely immediate effect on the fox and wolf populations?

   1. (A)

      Fox population would decrease, and wolf population might also decrease.

   2. (B)

      Both fox and wolf populations would remain stable due to alternative food sources.

   3. (C)

      Fox population would increase, while wolf population would decrease.

   4. (D)

      Both fox and wolf populations would increase due to less competition.

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   Answer: (A)

   Fox population would decrease, and wolf population might also decrease.

   Organization for Matter and Energy Flow in Organisms · Hard

6. Links Among Engineering, Technology, Science, and Society

   6.

   Which of the following best describes the primary goal of engineering?

   1. (A)

      To conduct experiments and analyze data to form new theories.

   2. (B)

      To develop new technologies for artistic expression and entertainment.

   3. (C)

      To discover fundamental scientific principles about the natural world.

   4. (D)

      To apply scientific knowledge to design and build solutions for practical problems.

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   Answer: (D)

   To apply scientific knowledge to design and build solutions for practical problems.

   Links Among Engineering, Technology, Science, and Society · Easy

7. 7.

   The development of the internet has profoundly impacted society by facilitating global communication and information sharing. This is an example of:

   1. (A)

      An artistic movement inspiring a new scientific theory.

   2. (B)

      A political decision dictating the direction of scientific research.

   3. (C)

      A technological advancement influencing societal structure and interaction.

   4. (D)

      A scientific discovery leading to a new engineering principle.

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   Answer: (C)

   A technological advancement influencing societal structure and interaction.

   Links Among Engineering, Technology, Science, and Society · Medium

8. 8.

   How does technology primarily differ from science?

   1. (A)

      Technology is always expensive; science is always inexpensive.

   2. (B)

      Science focuses on observation; technology focuses on theory.

   3. (C)

      Science seeks to understand the natural world; technology seeks to create solutions.

   4. (D)

      Technology uses qualitative data; science uses quantitative data.

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   Answer: (C)

   Science seeks to understand the natural world; technology seeks to create solutions.

   Links Among Engineering, Technology, Science, and Society · Easy

9. 9.

   The invention of the printing press led to widespread literacy and the dissemination of knowledge, fundamentally altering social structures and religious practices. This illustrates the:

   1. (A)

      Interconnectedness of technology, society, and science.

   2. (B)

      Limited influence of technology on cultural development.

   3. (C)

      Irrelevance of engineering to historical change.

   4. (D)

      Purely academic impact of scientific advancements.

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   Answer: (A)

   Interconnectedness of technology, society, and science.

   Links Among Engineering, Technology, Science, and Society · Medium

10. 10.

    Consider the ethical implications of genetic engineering. What responsibility does society have in guiding the development and application of such advanced technologies?

    1. (A)

       To allow engineers to independently determine all applications without external oversight.

    2. (B)

       To prioritize economic benefits over all other considerations when implementing new technologies.

    3. (C)

       To engage in public discourse, establish regulations, and consider long-term societal impacts.

    4. (D)

       To halt all research in areas with potential ethical concerns to prevent any negative outcomes.

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    Answer: (C)

    To engage in public discourse, establish regulations, and consider long-term societal impacts.

    Links Among Engineering, Technology, Science, and Society · Hard

— End of the paper · updated 11 November 2026 —