Most of the Carbon Dioxide Carried in the Blood from the Tissues

question 32

Multiple Choice

Most of the carbon dioxide carried in the blood from the tissues to the lungs is in what form?

• A)carbonic acid,H₂CO₃
• B)CO₂ dissolved in the blood
• C)CO₂ bound to the N-terminal end of hemoglobin chains
• D)CO₂ bound to the C-terminal end of the hemoglobin chains
• E)as the bicarbonate ion dissolved in the blood

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Definitions:

Protobionts

Assemblages of organic polymers that spontaneously form under certain conditions. Protobionts may have been involved in chemical evolution.

Abiotically Produced

Referring to substances or processes occurring without the involvement of biological organisms, typically through physical or chemical phenomena.

Ribozymes

RNA molecules capable of catalyzing specific biochemical reactions, similar to protein enzymes.

Late Pliocene

A geological time period that occurred about 3.6 to 2.58 million years ago, just before the Pleistocene, and is characterized by significant climatic changes that led to the current ice age.