Question

move the terms into the correct empty boxes to complete this concept map contrasting inducible and repressible operons.
frp operon
off
induced
inactive
lac operon
on
active
repressed
anabolic
catabolic
reset
bacterial operons
substrate is broken down
default mode is
example
operon can be
by making the repressor protein
product is synthesized
default mode is
example
operon can be
by making the repressor protein

Explanation:

• Inducible Operon (left side):
• Catabolic pathways break down substrates. The lac operon is a classic example. In the absence of the inducer (lactose), the repressor is active and keeps the operon off. When lactose (the substrate) is present, it induces the operon by making the repressor inactive.
• Repressible Operon (right side):
• Anabolic pathways synthesize products. The trp operon is an example. In the default mode (when tryptophan, the product, is not abundant), the operon is on. When there is enough tryptophan, it acts as a corepressor. It makes the repressor active, and the operon gets repressed (turned off).

Answer:

Left - side boxes (top - to - bottom):

• Inducible operon (category, not in the given terms but conceptually; since it's catabolic as substrate is broken down)
• on (default mode for inducible operon when no inducer is there, but actually when inducer is present it's induced. Wait, no: for inducible operon (lac operon), default mode is off (when no lactose). But when lactose (substrate) is present (inducer), it's induced. Wait, correction:
• Inducible operon (as it's catabolic - substrate breakdown)
• off (default mode of lac operon when no lactose)
• lac operon (example)
• induced (when substrate (lactose) is present)
• inactive (repressor when inducer (lactose) is present)

Right - side boxes (top - to - bottom):

• Repressible operon (as it's anabolic - product synthesis)
• on (default mode of trp operon when no tryptophan)
• trp operon (example)
• repressed (when product (tryptophan) is present)
• active (repressor when corepressor (tryptophan) is present)