Living Cells Organization and Energy Changes

What are biomolecules?

• Biomolecules are not essential for life

• Synthetic molecules essential for life

• Organic molecules essential for life

• Inorganic molecules essential for life

What is thermodynamics?

• Branch of physics dealing with heat and energy

• Branch of biology dealing with plants and animals

• Branch of chemistry dealing with elements and compounds

• Branch of mathematics dealing with numbers and equations

What is Gibbs free energy?

• Gibbs free energy is a measure of the disorder or randomness of a system.

• Gibbs free energy is the energy released or absorbed during a chemical reaction.

• Gibbs free energy is a measure of the total energy of a system.

• Gibbs free energy is a thermodynamic potential that measures the maximum reversible work that can be performed by a system at constant temperature and pressure.

What are the four major biomolecules?

• carbohydrates, lipids, proteins, and nucleic acids

• carbohydrates, lipids, proteins, and minerals

• carbohydrates, lipids, proteins, and vitamins

• carbohydrates, lipids, proteins, and nucleic acids

What is the first law of thermodynamics?

• Energy can only be transferred.

• Energy cannot be created or destroyed, only transferred or transformed.

• Energy can be created and destroyed.

• Energy can be transformed into matter.

What is the second law of thermodynamics?

How is Gibbs free energy related to enthalpy and entropy?

• ΔG = ΔH + ΔS

• ΔG = ΔH + TΔS

• ΔG = ΔH/TΔS

• ΔG = ΔH - TΔS

What is the role of proteins in living cells?

• Proteins are involved in various functions such as structural support, enzymatic reactions, transportation of molecules, cell signaling, and regulation of gene expression.

• Proteins have no role in living cells.

• Proteins are only involved in structural support in living cells.

• Proteins are only involved in transportation of molecules in living cells.

What is the difference between exergonic and endergonic reactions?

• Exergonic reactions and endergonic reactions both release energy.

• Exergonic reactions require energy input, while endergonic reactions release energy.

• Exergonic reactions release energy, while endergonic reactions require energy input.

• Exergonic reactions and endergonic reactions both require energy input.

How does temperature affect the rate of chemical reactions?

• Temperature has no effect on the rate of chemical reactions.

• Temperature decreases the rate of chemical reactions.

• Temperature only affects the rate of some chemical reactions.

• Temperature increases the rate of chemical reactions.