BioE and Met

What does the First Law of Thermodynamics state?

• A. Energy can be created and destroyed.

• B. Energy is always increasing in the universe.

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

• D. Entropy always decreases.

According to the Second Law of Thermodynamics, what happens in an isolated system over time?

• A. Energy remains constant.

• B. Disorder increases.

• C. Energy is destroyed.

• D. The temperature decreases.

What is the main product of glycolysis?

• A. Pyruvate

• B. Acetyl-CoA

• C. NADH and FADH₂

• D. Carbon dioxide

Where does glycolysis occur in the cell?

• A. Mitochondria

• B. Cytoplasm

• C. Nucleus

• D. Endoplasmic Reticulum

Which molecule enters the Krebs cycle?

• A. Pyruvate

• B. Glucose

• C. Acetyl-CoA

• D. ATP

What is the main function of the Krebs cycle?

• A. To break down glucose.

• B. To produce ATP directly.

• C. To generate electron carriers (NADH & FADH₂).

• D. To convert pyruvate into lactate.

Where does the electron transport chain occur?

• A. Cytoplasm

• B. Mitochondrial Matrix

• C. Inner Mitochondrial Matrix

• D. Nucleus

What is the final electron acceptor in the electron transport chain?

• A. NAD+

• B. FADH₂

• C. Oxygen (O₂)

• D. Carbon dioxide (CO₂)

What enzyme is responsible for ATP production in oxidative phosphorylation?

• A. Pyruvate dehydrogenase

• B. ATP synthase

• C. Phosphofructokinase

• D. Hexokinase

How many ATP molecules are produced (approximately) from one glucose molecule after oxidative phosphorylation?

• A. 2

• B. 4

• C. 32-38

• D. 100