The Rate-Limiting Enzyme Associated with the Krebs Cycle Is

question 105

Multiple Choice

The rate-limiting enzyme associated with the Krebs cycle is:

• A) lactate dehydrogenase (LDH).
• B) creatine kinase (CK).
• C) phosphofructokinase (PFK).
• D) isocitrate dehydrogenase (IDH).

---

Definitions:

Pineal Gland

A small endocrine gland in the vertebrate brain that produces the hormone melatonin, which regulates sleep patterns.

Egg Rolling Behavior

A behavioral adaptation seen in some bird species where eggs that have been displaced from the nest are rolled back to the nest by the parent.

Motor Program

A coordinated sequence of muscle actions responsible for many behaviors we think of as automatic.

Diurnal

Active during the day and resting at night, opposite to nocturnal.