Concentration Gradients, Signaling Molecules & Inhibitors in Development


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What is a protease?

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Which of the following contribute to the formation of the concentration gradient of BMP-4 in the frog embryo?

A. BMP-4 is produced in the ventral portion of the embryo

B. Chordin is produced in Spemann's Organizer

C. Chordin inhibits BMP-4

D. Xolloid is produced in the ventral portion of the embryo.

E. Xolloid degrades chordin.

2. Which of the following statements is true about chordin?

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About This Quiz & Worksheet

This quiz will assess your knowledge of the process of embryonic development and concentration gradients, as well as your understanding of key vocabulary. Some vocabulary terms you'll need to know include protease and xolloid.

Quiz & Worksheet Goals

In this assessment you will be tested on your knowledge of:

  • Definition of a protease
  • Formation of the concentration gradient of a BMP-4
  • Production of chordin
  • Definition of a xolloid
  • Effect of chordin on a BMP-4 concentration gradient

Skills Practiced

  • Reading comprehension - ensure that you draw the most important information from the related concentration gradient lesson
  • Interpreting information - verify that you can read information regarding molecule and protein production and development and interpret it correctly
  • Defining key concepts - ensure that you can accurately define main terms, such as protease and xolloid

Additional Learning

To learn more about concentration gradients and embryonic development, review the accompanying lesson on Concentration Gradients, Signaling Molecules & Inhibitors in Development. This lesson covers the following objectives:

  • Understand how Spemann's Organizer works
  • Know the differences between signaling molecules, proteases and inhibitors
  • Understand how tissues are differentiated within an embryo
  • Know how ventral structures are developed by the BMP-4 protein
  • Understand how multiple concentration gradients add complexity