Mitochondrial Structure and Functions

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What is the primary function of the cristae in mitochondria?

To transport proteins across the membrane
To regulate the movement of oxygen and ATP
To increase the surface area for chemical reactions (correct)
To synthesize ATP molecules

What is the primary mechanism of transporting molecules across the mitochondrial membrane?

Passive transport through the cristae
Active transport through transport proteins (correct)
Facilitated diffusion through the intermembrane space
Simple diffusion through the matrix

During which stage of cellular respiration is a significant amount of ATP produced?

Glycolysis
Anaerobic respiration
Mitochondrial transport
Oxidative phosphorylation (correct)

What is the byproduct of glycolysis that is required for the next step in the mitochondria?

Pyruvate (C) Signup and view all the answers

Where does glycolysis occur in the cell?

Cytosol (A) Signup and view all the answers

What is the purpose of phosphorylation in the first step of glycolysis?

To add phosphates to glucose (B) Signup and view all the answers

What is the primary function of cellular respiration?

To produce ATP from glucose (B) Signup and view all the answers

What is the role of oxidative phosphorylation in cellular respiration?

To generate ATP from the electron transport chain (A) Signup and view all the answers

What is the product of the metabolic pathway involved in cellular respiration?

ATP (D) Signup and view all the answers

Which stage of cellular respiration is responsible for generating the majority of ATP?

Oxidative phosphorylation (B) Signup and view all the answers

What is the role of chemiosmosis in oxidative phosphorylation?

To generate a proton gradient across the inner mitochondrial membrane (C) Signup and view all the answers

Why is the yield of ATP not 100% efficient in cellular respiration?

Because of the energy lost as heat (D) Signup and view all the answers

During glycolysis, what is the result of STEP 1 - PHOSPHORYLATION?

Fructose bisphosphate is formed (D) Signup and view all the answers

What is the net ATP production in glycolysis?

2 ATP (D) Signup and view all the answers

What is the role of pyruvate translocase in cellular respiration?

To transport pyruvate into the mitochondria (A) Signup and view all the answers

What is the byproduct of the link reaction that is used in the electron transport chain?

NADH and FADH2 (C) Signup and view all the answers

What is the purpose of the electron transport chain?

To transport electrons from one member of the transport chain to another (A) Signup and view all the answers

What is the result of 2 pyruvate molecules entering the link reaction?

2 NADH and 2 FADH2 are produced (B) Signup and view all the answers

What is the net ATP production in the electron transport chain?

32-34 ATP (C) Signup and view all the answers

What is the purpose of chemiosmosis in oxidative phosphorylation?

To transport protons across the inner mitochondrial membrane (C) Signup and view all the answers

What is the net ATP production in cellular respiration?

36-38 ATP (C) Signup and view all the answers

What is the purpose of oxidative phosphorylation?

To produce ATP through the electron transport chain (A) Signup and view all the answers