Cellular Energy and the Atmosphere

What is the primary source of energy for autotrophs?

• Chemical reactions in the soil

• Energy from the Sun

• Energy from other organisms

• Heat from the Earth's core

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What process do plants use to convert light energy into chemical energy?

• Respiration

• Photosynthesis

• Fermentation

• Transpiration

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Why is it important for organisms to convert energy?

• To grow larger

• To survive and maintain life processes

• To reproduce

• To compete with other organisms

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Which of the following elements is NOT one of the building blocks of life mentioned in the text?

• Hydrogen

• Carbon

• Calcium

• Nitrogen

How do animals primarily obtain energy?

• Through photosynthesis

• By consuming other organisms

• By absorbing energy from the soil

• Through cellular respiration alone

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What are macromolecules?

• Simple molecules that cannot perform life functions

• Large molecules essential for performing life functions

• Molecules that are only found in plants

• Small molecules that are not important for life

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What determines the function of a macromolecule?

• Its size

• Its color

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Which of the following is NOT a type of biomolecule?

• A) Carbohydrates

• B) Lipids

• C) Vitamins

• D) Proteins

What happens to a macromolecule if its structure is disrupted?

• A) It becomes more efficient

• B) It can still function properly

• C) It can no longer function properly

• D) It transforms into another type of macromolecule

Why is it important to understand the elements that make up energy-storage molecules?

• A) To create new organisms

• B) To understand how energy can be converted and utilized

• C) To learn about the history of life on Earth

• D) To determine the color of organisms

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