The Figure Shows a Simple Metabolic Pathway

question 27

Multiple Choice

The figure shows a simple metabolic pathway.
-According to Beadle and Tatum's (1930s) hypothesis, how many genes are necessary for this pathway?

• A) 1
• B) 2
• C) 3
• D) It cannot be determined from the pathway.

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Definitions:

Uric Acid

A chemical created when the body breaks down substances called purines, elevated levels of which can lead to gout and kidney stones.

Gout

A form of arthritis characterized by sudden, severe attacks of pain, swelling, and redness, often in the big toe, caused by excess uric acid.

Arthritis

Inflammation of one or more joints, causing pain and stiffness.

Multiple Myeloma

A cancer of plasma cells, a type of white blood cell in bone marrow, characterized by excessive numbers of abnormal plasma cells in the bone marrow.