The Table Shows the Biochemical Pathway of Arginine Production and Growth

question 54

Multiple Choice

The table shows the biochemical pathway of arginine production and growth of Neurospora under various conditions. Wild-type Neurospora was treated with X-rays to induce heritable mutations.Treated Neurospora was grown on minimal medium ("no addition" in the table) and minimal medium supplemented with the compounds indicated in the table.Growth is indicated as dry weight of fungal material after 5 days.Here we see the results of three mutated strains that were linked to the metabolic pathway that generates arginine.Without arginine production, Neurospora cannot grow. Considering the biochemical pathway of arginine production, which strain harbors a mutation in the enzyme that converts ornithine to citrulline?

• A) 34105
• B) 33442
• C) 36703
• D) Double mutant
• E) Cannot be determined.

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Dehydrate

The process of losing or removing water from an organism or substance.

Cardiovascular System

The body’s system comprising the heart and blood vessels, responsible for circulating blood and transporting nutrients, oxygen, and waste products.

Digestive System

The group of organs responsible for breaking down food, absorbing nutrients, and eliminating waste products from the body.

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A biological system within an organism that works to facilitate reproduction, including the genital organs in males and females.