When Are Secondary Metabolites Are Produced

question 17

Multiple Choice

When are secondary metabolites are produced?

• A) During biosynthesis of amino acids.
• B) During catabolism.
• C) After exponential growth has ceased.
• D) Before exponential growth begins.
• E) As byproducts of aromatic amino acid biosynthesis.

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Definitions:

Primary Growth

Growth that occurs as a result of cell division at the tips of stems and roots, causing them to elongate, and gives rise to primary tissues.

Secondary Xylem

The part of a plant that contributes to the growth in thickness of the stem and roots, primarily responsible for water transport and support.

Vascular Cambium

A layer of plant tissue that produces new transport cells, contributing to stem and root growth.

Indeterminate Growth

Unrestricted growth, as for example, in stems and roots. Compare with determinate growth.