Which Feature Characterizes β-Catenin's Role in Amphibian Embryos

question 189

Multiple Choice

Which feature characterizes β-catenin's role in amphibian embryos?

• A) Its overexpression in a particular region of the blastula induces a second axis of embryo formation.
• B) It acts as an inductive signal by phosphorylating other proteins that enter the nucleus and act as transcription factors.
• C) When its mRNA transcripts are increased by injecting them into the egg, gastrulation does not occur.
• D) It interacts with signals from cells in the animal hemisphere to set up signaling pathways.
• E) It is necessary but not sufficient for formation of the primary embryonic organizer.

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Definitions:

Power Factor

The ratio of real power flowing to the load to the apparent power in the circuit, indicating the efficiency of power usage.

Angle Theta

A symbol commonly used in trigonometry and physics to denote a certain angle, often in relation to circular motion or rotational phenomena.

Series RL Circuit

An electrical circuit composed of resistors (R) and inductors (L) connected in series, influencing the circuit's impedance and phase angle.

Inductive Reactance

Inductive reactance is the opposition that an inductor presents to alternating current, depending on the frequency of the current and the inductance of the component.