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Which of the following processes causes most of the carbon dioxide from the blood to move into the alveoli?

A. Diffusion down a concentration gradient

B. Conversion of carbon monoxide

C. Passive transport using carrier proteins

D. Active transport using energy

Answer Explanation:

Carbon dioxide moves from the blood to the alveoli through the process of diffusion. The blood has a high concentration of carbon dioxide than the alveoli.
Therefore, carbon dioxide diffuses from blood to alveoli through the cell membrane.

Therefore, the Correct Answer is A.

Q #1: Which of the following vessels carries oxygenated blood?

A. Inferior vena cava

B. Pulmonary vein

C. Pulmonary artery

D. Superior vena cava

Answer Explanation

Pulmonary vein carries oxygenated blood from the lungs to the heart. Pulmonary artery carries deoxygenated blood from the heart to the lungs.
Superior and inferior vena cava bring in deoxygenated blood from all other parts of the body to the heart.
Q #2: Gel electrophoresis To separate genomic DNA fragments by size, which of these laboratory methods is most useful?

A. Filtration

B. Titration

C. Electrophoresis

D. Spectrophotometry

Answer Explanation

Electrophoresis is a lab method that is commonly used to separate charge molecules based on their size. Some of the charged molecules include DNA, RNA, and proteins.
Q #3: Which of the following sequences on a DNA molecule would be complementary to GCTTATAT?

A. TAGGCGCG

B. ATCCGCGC

C. CGAATATA

D. TGCCTCTC

Answer Explanation

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