Arginine Is Synthesized in a Pathway Involving Several Enzymes and Biosynthetic

question 28

Essay

Arginine is synthesized in a pathway involving several enzymes and biosynthetic intermediates. Five Neurospora crassa strains were cultured on minimal media containing various additives, and the results are shown. Match each N. crassa strain with its description.


$$\begin{array} { | c | c | c | c | c | } \hline & \text { glutamate } & \text { ornithine } & \text { citrulline } & \text { arginine } \\\hline \text { Strain A } & \text { growth } & \text { growth } & \text { growth } & \text { growth } \\\hline \text { Strain B } & \text { no growth } & \text { no growth } & \text { growth } & \text { growth } \\\hline \text { Strain C } & \text { no growth } & \text { no growth } & \text { no growth } & \text { no growth } \\\hline \text { Strain D } & \text { no growth } & \text { no growth } & \text { no growth } & \text { growth } \\\hline \text { Strain E } & \text { no growth } & \text { growth } & \text { growth } & \text { growth } \\\hline\end{array}$$

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Definitions:

Monopoly

A market structure characterized by a single seller, offering a unique product or service with no close substitutes, leading to the control of a particular market.

Gross Investment

The total expenditure on new capital assets (plant, equipment, buildings) before accounting for depreciation.

Net Export

The value of a country's total exports minus its total imports, representing the balance of trade.

Private Consumption

Expenditure by households on goods and services, excluding purchases of residences.