BIO 1150 Exam 3 Study Guide – Cellular Respiration & Photosynthesis Diagrams

Q11. Fill in the blanks in the following figures.

Background

Topic: Cellular Respiration and Photosynthesis Pathways

This question tests your understanding of the major steps, molecules, and compartments involved in cellular respiration and photosynthesis. You are expected to identify and label key components in the diagrams, such as molecules, organelle compartments, and protein complexes.

Key Terms and Concepts:

• Cellular Respiration: Glycolysis, Pyruvate Oxidation, Citric Acid Cycle, Electron Transport Chain, ATP Synthase, NADH, FADH2, NAD+, O2, H2O, ADP, ATP, Mitochondrial Matrix, Inner Membrane, Intermembrane Space, Cytosol

• Photosynthesis: Light Reactions, Calvin Cycle, Photosystem I & II, NADP+, NADPH, ATP, ADP, H2O, O2, CO2, Chloroplast, Thylakoid, Stroma, Thylakoid Space

Step-by-Step Guidance

1. Examine each diagram carefully. Identify the overall process depicted (e.g., electron transport chain in mitochondria or chloroplast, Calvin cycle, etc.).

2. For each blank label, look for clues such as the direction of arrows, the location within the organelle, and the context (e.g., is it a membrane protein, a small molecule, or a compartment?).

3. Recall the sequence of events in cellular respiration and photosynthesis. For example, in the mitochondrial electron transport chain, electrons move through complexes I-IV, protons are pumped into the intermembrane space, and ATP synthase generates ATP.

4. Match the labels to the correct structures or molecules. For example, in the mitochondria diagram, identify where NADH donates electrons, where ATP is synthesized, and where O2 acts as the final electron acceptor.

5. For the chloroplast diagrams, distinguish between the light reactions (thylakoid membrane, production of ATP and NADPH, splitting of water) and the Calvin cycle (stroma, carbon fixation).

Try solving on your own before revealing the answer!

Final Answer (Sample for Diagram 1):

• a) Intermembrane space

• b) Inner membrane

• c) Matrix

• d) Electron transport chain

• e) NADH

• f) NAD+

• g) H+

• h) O2

• i) H2O

• j) ATP synthase

• k) ADP

• l) ATP

Each label corresponds to a key molecule, compartment, or protein complex involved in the mitochondrial electron transport chain. The same approach applies to the chloroplast diagrams, focusing on the flow of energy and electrons during photosynthesis.