Practice Questions

TLS Online TPP Program

#Question id: 648

Enzyme catalysis is regulated by a number of mechanisms. Also, the flux through metabolic pathways must be regulated. Given the metabolic pathway below, which choice accurately describes the regulation of compound G levels?

#Unit 1. Molecules and their Interaction Relevant to Biology

G is regulated by chemical modification of the enzyme that catalyzes step 3.
G serves as an inhibitory effector of the allosteric enzyme that catalyzes step 3.
G inhibits the expression of the enzyme that catalyzes the formation of D.
The reversible reaction of B to D is converted to an irreversible reaction.

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TLS Online TPP Program

#Question id: 9574

#Unit 10. Ecological Principles

What is the prevailing wind direction in equatorial regions affected by the trade winds?

TLS Online TPP Program

#Question id: 11543

#Unit 7. System Physiology – Animal

Hormone X activates the cAMP second messenger system in its target cells. The greatest response by a target cell would come from ________.

TLS Online TPP Program

#Question id: 19281

#Unit 9. Diversity of Life Forms

A botanist discovers a new species of plant in a tropical rain forest. After observing its anatomy and life cycle, the following characteristics are noted: flagellated sperm, xylem with tracheids, separate gametophyte and sporophyte generations with the sporophyte dominant, and no seeds. This plant is probably most closely related to

TLS Online TPP Program

#Question id: 11010

#Unit 7. System Physiology – Animal

Which of the following best explains how sympathetic stimulation affects the heart?

TLS Online TPP Program

#Question id: 23598

#Unit 1. Molecules and their Interaction Relevant to Biology

If A + B means B is the brother of A; A ×B means B is the husband of A; A −B means A is the mother of B and A%B means A is the father of B, which of the following relations shows that Q is the grandmother of T?