Energy and Life: A Deep Dive into Cellular Processes

What is the main source of energy for most living organisms on Earth?

• The Sun

• The Moon

• Electricity

• Geothermal vents

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What is the primary function of energy in cells?

• To destroy harmful substances

• To power cellular and bodily functions

• To store genetic information

• To create new cells

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What is the first law of thermodynamics?

• Energy can be created but not destroyed

• Energy is always conserved

• Energy decreases in a closed system

• Energy increases in a closed system

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How is chemical energy stored in cells?

• In lipid bilayers

• As mechanical energy

• In the form of ATP

• As thermal energy

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What is ATP's role in the cell?

• Is used as a structural component of cell membranes

• Functions as a cellular toxin

• Serves as a primary energy carrier

• Acts as a genetic messenger

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What does ATP break down into during hydrolysis?

• Amino acids

• Carbon dioxide and water

• ADP and a phosphate group

• Glucose and oxygen

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What is the second law of thermodynamics about?

• Energy conservation

• Decrease in entropy

• Increase in entropy

• Energy creation

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How do enzymes affect chemical reactions in the cell?

• They have no effect on reactions

• They slow down reactions

• They speed up reactions

• They change the direction of reactions

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What is a metabolic pathway?

• A form of genetic information

• A sequence of chemical reactions in a cell

• A type of enzyme

• A method of cell communication

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What role do enzymes play in metabolic pathways?

• They store energy

• They provide structural support

• They catalyze reactions, lowering activation energy

• They transport substances across the cell membrane

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