Connections between Cells and Cellular Activities

Review Questions

Which of the following are only in plant cells?

  1. gap junctions
  2. desmosomes
  3. plasmodesmata
  4. tight junctions

Hint:

C

The key components of desmosomes are cadherins and __________.

  1. actin
  2. microfilaments
  3. intermediate filaments
  4. microtubules

Hint:

C

Diseased animal cells may produce molecules that activate death cascades to kill the cells in a controlled manner. Why would neighboring healthy cells also die?

  1. The death molecule is passed through desmosomes.
  2. The death molecule is passed through plasmodesmata.
  3. The death molecule disrupts the extracellular matrix.
  4. The death molecule passes through gap junctions.

Hint:

D