Which Catabolic Processes May Have Been Used by Cells on Ancient

question 43

Multiple Choice

Which catabolic processes may have been used by cells on ancient Earth before free oxygen became available?

• A)only glycolysis and fermentation
• B)only glycolysis and the citric acid cycle
• C)only glycolysis and pyruvate oxidation
• D)only oxidative phosphorylation,using an electron acceptor other than oxygen
• E)glycolysis,pyruvate oxidation,the citric acid cycle,and oxidative phosphorylation,using an electron acceptor other than oxygen

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Definitions:

Body Weight

The mass or weight of a person, measured in units such as pounds or kilograms.

Chest Circumference

A measurement around the largest part of the chest, used in medical assessments to evaluate growth and respiratory health.

Head Measurement

The process of measuring the circumference of a person's head, often used in medical settings to assess growth in infants and children.

Tripod Position

A body position often adopted by individuals in respiratory distress, where they sit upright while leaning forward on extended arms, helping to reduce breathing effort.