Comprehensive Study Guidance for Biology 1110 Exam 2 (Chapters 6–10)

Q1. What is the endomembrane system and what organelles does it include?

Background

Topic: Cell Structure and Function

This question tests your understanding of the components and roles of the endomembrane system in eukaryotic cells.

Key Terms:

• Endomembrane system: A group of membranes and organelles in eukaryotic cells that work together to modify, package, and transport lipids and proteins.

• Organelles: Specialized structures within a cell that perform distinct processes.

Step-by-Step Guidance

1. Recall the definition of the endomembrane system and its general function in the cell.

2. List the main organelles that are considered part of the endomembrane system (e.g., nucleus, endoplasmic reticulum, Golgi apparatus, lysosomes, vesicles, plasma membrane).

3. Think about how these organelles interact to transport materials within the cell.

Try solving on your own before revealing the answer!

Q2. What are the two overall basic types of cells?

Background

Topic: Cell Theory and Classification

This question is about distinguishing between the two fundamental categories of cells found in all living organisms.

Key Terms:

• Prokaryotic cells: Cells without a nucleus or membrane-bound organelles.

• Eukaryotic cells: Cells with a nucleus and membrane-bound organelles.

Step-by-Step Guidance

1. Recall the main differences between prokaryotic and eukaryotic cells.

2. Think about examples of organisms that have each type of cell.

3. Consider the structural features that distinguish these two cell types.

Try solving on your own before revealing the answer!

Q3. What is the function of the mitochondria?

Background

Topic: Cell Organelles and Energy Production

This question tests your knowledge of the role of mitochondria in eukaryotic cells.

Key Terms:

• Mitochondria: Organelles known as the "powerhouses" of the cell.

• ATP (adenosine triphosphate): The main energy currency of the cell.

Step-by-Step Guidance

1. Recall the main function of mitochondria in cellular respiration.

2. Think about how mitochondria contribute to energy production in the cell.

3. Consider the processes that occur within mitochondria (e.g., the electron transport chain, ATP synthesis).

Try solving on your own before revealing the answer!

Q4. What are the differences between phagocytosis and autophagy?

Background

Topic: Cellular Processes

This question is about understanding two important mechanisms cells use to break down materials.

Key Terms:

• Phagocytosis: The process by which a cell engulfs large particles or other cells.

• Autophagy: The process by which a cell digests its own components.

Step-by-Step Guidance

1. Define each process and identify what is being broken down in each case.

2. Think about the purpose of each process for the cell.

3. Consider which organelles are involved in these processes (e.g., lysosomes).

Try solving on your own before revealing the answer!

Q5. What are the three primary stages of cellular respiration, in order?

Background

Topic: Cellular Respiration

This question tests your ability to recall the sequence of metabolic pathways that cells use to extract energy from glucose.

Key Terms and Pathways:

• Glycolysis

• Citric Acid Cycle (Krebs Cycle)

• Oxidative Phosphorylation (Electron Transport Chain and Chemiosmosis)

Step-by-Step Guidance

1. Recall the first stage, which occurs in the cytoplasm and breaks down glucose into pyruvate.

2. Identify the second stage, which takes place in the mitochondrial matrix and generates electron carriers.

3. Think about the third stage, which uses the electron carriers to produce ATP in the inner mitochondrial membrane.

Try solving on your own before revealing the answer!

Q6. Write the balanced chemical equation for photosynthesis, including the number of each molecule.

Background

Topic: Photosynthesis

This question tests your ability to recall and write the overall chemical reaction for photosynthesis, showing the reactants and products with correct stoichiometry.

Key Formula:

General equation for photosynthesis:

$6 \mathrm{CO}_2 + 6 \mathrm{H}_2\mathrm{O} + \text{light energy} \rightarrow \mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6 \mathrm{O}_2$

Step-by-Step Guidance

1. Recall the reactants (carbon dioxide, water, and light energy) and products (glucose and oxygen) of photosynthesis.

2. Write the chemical formulas for each reactant and product.

3. Balance the equation by ensuring the number of atoms of each element is equal on both sides.

Try solving on your own before revealing the answer!

Q7. What are the two primary stages of photosynthesis, in order?

Background

Topic: Photosynthesis Pathways

This question is about the two main sets of reactions that occur during photosynthesis.

Key Terms:

• Light-dependent reactions (or light reactions)

• Calvin Cycle (light-independent reactions)

Step-by-Step Guidance

1. Recall which stage occurs first and where it takes place in the chloroplast.

2. Identify the main purpose of each stage (e.g., capturing light energy, synthesizing glucose).

3. Think about the inputs and outputs of each stage.

Try solving on your own before revealing the answer!