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1.2 What happens in cells (and what do cells need)?

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Question 6

During aerobic respiration in a mammalian muscle cell, glucose is broken down to yield ATP. Which of the following correctly identifies the sequential stages of this process, their precise sub-cellular locations, and the primary electron acceptors involved?

A
1. Glycolysis: Cytoplasm; NAD+2. Link reaction: Mitochondrial matrix; NAD+3. Krebs cycle: Mitochondrial matrix; NAD+ and FAD4. Oxidative phosphorylation: Inner mitochondrial membrane; O2 \begin{aligned} &\textbf{1. Glycolysis:} \text{ Cytoplasm; } \text{NAD}^+ \\ &\textbf{2. Link reaction:} \text{ Mitochondrial matrix; } \text{NAD}^+ \\ &\textbf{3. Krebs cycle:} \text{ Mitochondrial matrix; } \text{NAD}^+ \text{ and } \text{FAD} \\ &\textbf{4. Oxidative phosphorylation:} \text{ Inner mitochondrial membrane; } \text{O}_2 \end{aligned} ​1. Glycolysis: Cytoplasm; NAD+2. Link reaction: Mitochondrial matrix; NAD+3. Krebs cycle: Mitochondrial matrix; NAD+ and FAD4. Oxidative phosphorylation: Inner mitochondrial membrane; O2​​
B
1. Glycolysis: Mitochondrial matrix; NAD+2. Link reaction: Cytoplasm; FAD3. Krebs cycle: Inner mitochondrial membrane; NAD+4. Oxidative phosphorylation: Outer mitochondrial membrane; O2 \begin{aligned} &\textbf{1. Glycolysis:} \text{ Mitochondrial matrix; } \text{NAD}^+ \\ &\textbf{2. Link reaction:} \text{ Cytoplasm; } \text{FAD} \\ &\textbf{3. Krebs cycle:} \text{ Inner mitochondrial membrane; } \text{NAD}^+ \\ &\textbf{4. Oxidative phosphorylation:} \text{ Outer mitochondrial membrane; } \text{O}_2 \end{aligned} ​1. Glycolysis: Mitochondrial matrix; NAD+2. Link reaction: Cytoplasm; FAD3. Krebs cycle: Inner mitochondrial membrane; NAD+4. Oxidative phosphorylation: Outer mitochondrial membrane; O2​​
C
1. Glycolysis: Cytoplasm; FAD2. Link reaction: Mitochondrial matrix; NAD+3. Krebs cycle: Inner mitochondrial membrane; FAD4. Oxidative phosphorylation: Mitochondrial matrix; O2 \begin{aligned} &\textbf{1. Glycolysis:} \text{ Cytoplasm; } \text{FAD} \\ &\textbf{2. Link reaction:} \text{ Mitochondrial matrix; } \text{NAD}^+ \\ &\textbf{3. Krebs cycle:} \text{ Inner mitochondrial membrane; } \text{FAD} \\ &\textbf{4. Oxidative phosphorylation:} \text{ Mitochondrial matrix; } \text{O}_2 \end{aligned} ​1. Glycolysis: Cytoplasm; FAD2. Link reaction: Mitochondrial matrix; NAD+3. Krebs cycle: Inner mitochondrial membrane; FAD4. Oxidative phosphorylation: Mitochondrial matrix; O2​​
D
1. Glycolysis: Cytoplasm; NAD+2. Link reaction: Inner mitochondrial membrane; FAD3. Krebs cycle: Mitochondrial matrix; NAD+4. Oxidative phosphorylation: Intermembrane space; H2O \begin{aligned} &\textbf{1. Glycolysis:} \text{ Cytoplasm; } \text{NAD}^+ \\ &\textbf{2. Link reaction:} \text{ Inner mitochondrial membrane; } \text{FAD} \\ &\textbf{3. Krebs cycle:} \text{ Mitochondrial matrix; } \text{NAD}^+ \\ &\textbf{4. Oxidative phosphorylation:} \text{ Intermembrane space; } \text{H}_2\text{O} \end{aligned} ​1. Glycolysis: Cytoplasm; NAD+2. Link reaction: Inner mitochondrial membrane; FAD3. Krebs cycle: Mitochondrial matrix; NAD+4. Oxidative phosphorylation: Intermembrane space; H2​O​
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1.2 What happens in cells (and what do cells need)? Questions

  1. GCSE
  2. /Biology
  3. /1.2 What happens in cells (and what do cells need)?

72 exam-style questions on OCR GCSE Biology 1.2 What happens in cells (and what do cells need)?, covering 1.2.1 Structure of DNA, 1.2.2 Nucleotides and complementary bases, 1.2.3 Protein synthesis, 1.2.4 DNA structure and the proteins made, 1.2.5 Investigating enzymatic reactions, and 1.2.6 Mechanism of enzyme action. Each one has a worked solution and a mark scheme showing where the marks go.

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