Plants can get along without respiratory organs because of the following except:

1.	Each plant part takes care of its own gas exchange needs
2.	Plants do not present great demands for gas exchange.
3.	Gas diffusion in plants occurs easily over long distances in plants.
4.	Each living cell in a plant is located quite close to the surface of the plant.

Sucrose is converted into glucose and fructose by the enzyme:

1. Maltase
2. Zymase
3. Isomerase
4. Invertase

The co-factor required for the activity of pyruvate dehydrogenase is:
1. Zinc
2. Magnesium
3. Manganese
4. Copper

In Kreb's cycle, a molecule of GTP is produced during the conversion of:
1. Citrate into Ketoglutarate
2. Succinyl-CoA into succinate
3. Succinate into malate
4. Malate into oxaloacetate

For each ATP produced, how many H passes through F₀ from the intermembrane space to the matrix down the electrochemical proton gradient?

1. 1
2. 2
3. 3
4. 4

If fatty acids were to be respired, they would first be degraded to:
1. Glucose-6 phosphate
2. Pyruvate
3. Acetyl-CoA
4. Alpha ketoglutarate

In the absence of oxygen, the primary purpose of fermentation is to:
1. produce amino acids for protein synthesis
2. generate a proton gradient for ATP synthesis
3. oxidize glucose to generate reduce electron carriers
4. regenerate NAD+ from NADH allowing glycolysis to continue

When proteins are used as respiratory substrates, the respiratory quotient would be about:
1. 1.2
2. 1.0
3. 0.9
4. 0.7

The mitochondrial electron transport chain is located in:
1. Outer membrane
2. Inner membrane
3. Inter membrane space
4. Matrix

The primary role of oxygen in cellular respiration is to: