Each Round of the Citric Acid Cycle Begins When the Four-Carbon

question 151

Multiple Choice

Each round of the citric acid cycle begins when the four-carbon molecule oxaloacetate is converted to the six-carbon molecule citrate. As the cycle progresses, two carbons are eliminated to regenerate the oxaloacetate. The added carbon is supplied by _____ and the two eliminated carbons are released as _____.

• A)ATP; acetyl-CoA
• B)CO₂; pyruvate
• C)acetyl-CoA; CO₂
• D)CO₂; NADH
• E)CO₂; acetyl-CoA

---

Definitions:

Rural Areas

Regions characterized by low population density, often agricultural or undeveloped lands, distinguished from urban or suburban areas.

Handicap Accessible

Environments, facilities, or services designed to be usable by individuals with disabilities, ensuring inclusivity and accessibility.

Residential Community

A living area where people reside in close proximity to one another and often share common values or goals; it may include amenities and services for the residents.

Socioemotional Selectivity

A theory proposing that people increasingly prioritize emotionally meaningful goals and relationships as they age.