Exam 4: Cells

At one point in human development, tissue connects the fingers, giving the hand a "webbed" appearance.  Enzymes eventually destroy the cells of the webbing and the fingers separate. These enzymes are probably localized in the ____. ​

The ____ regulates the movement of molecules in and out of the cell. ​

A eukaryotic chromosome is composed of ____. ​

Cells actively secreting enzymes would likely carry out more ____ than other cells. ​

Lysosomal enzymes function best at a pH of about ____.

The breakdown of hydrogen peroxide, a toxic substance, occurs in small, specialized membrane-bound organelles called ____. ​

The first observed cells were from ____.

Chromatin consists of ____. ​

A network of protein filaments called ____ lines and reinforces the inner surface of the nuclear envelope in animal cells. ​

Cytoskeletal elements are assembled from ____.

Trace the correct path in the endomembrane followed by a protein, beginning with its site of synthesis in the rough ER. ​

Which molecules integrate changes outside and inside the cells through communicating changes in the extracellular matrix to the cytoskeleton?

Mitochondria convert solar energy into chemical energy.

All cells have DNA to carry genetic information, a plasma membrane which serves as a selective barrier, and mitochondria for the generation of energy.