Bioenergetics

Mr. Anderson discusses bioenergetics, focusing on how living systems utilize free energy. He explains the first and second laws of thermodynamics, emphasizing energy conservation and entropy. The concept of Gibbs free energy is introduced, highlighting exergonic and endergonic reactions. The video also covers photosynthesis and cellular respiration, detailing how plants convert light energy into glucose and ATP. The importance of these processes in maintaining life is underscored, with a promise of further exploration in subsequent podcasts.

What is the primary focus of bioenergetics?

• The process of photosynthesis

• The structure of DNA

• How living systems utilize free energy

• The study of plant growth

Which law of thermodynamics is known as the Law of Conservation of Energy?

• First law

• Second law

• Third law

• Fourth law

What does the second law of thermodynamics state about entropy?

• Entropy is irrelevant

• Entropy increases over time

• Entropy remains constant

• Entropy decreases over time

How does evolution relate to the second law of thermodynamics?

• Evolution increases complexity locally

• Evolution decreases entropy universally

• Evolution is unrelated to thermodynamics

• Evolution violates the second law

What is the sign of delta G in an exergonic reaction?

• Zero

• Undefined

• Negative

• Positive

In photosynthesis, what is the sign of delta G?

• Positive

• Undefined

• Negative

• Zero

What provides the energy for photosynthesis in plants?

• Carbon dioxide

• Light

• Water

• Soil nutrients

What molecule is primarily responsible for energy transfer in cells?

• Glucose

• ATP

• NADH

• FADH2

What happens to delta G when ATP is converted to ADP?

• It becomes positive

• It becomes negative

• It remains zero

• It becomes undefined

Which process occurs in autotrophs to produce glucose?

• Cellular respiration

• Glycolysis

• Photosynthesis

• Fermentation