Exam 4: Lifes Home: the Cell

The most common form of cystic fibrosis,a fatal genetic disease,occurs when a protein destined for the plasma membrane of the cell is destroyed.The protein is destroyed by one of the cell's organelles because the protein is not shaped correctly.Which organelle recognizes the misshaped protein?

What determines whether a protein will be produced on a "free ribosome" or on one attached to the endoplasmic reticulum?

Mitochondria and chloroplasts are similar to one another in that both:

Plasmodesmata permit cell-to-cell communication in plants.Similar structures found in animals are:

An important by-product of photosynthesis is:

The typical animal cell is 25 micrometers in diameter.

Name three organelles involved in the synthesis of proteins in a cell,and describe the role each organelle plays in the process.

Which of the following expresses an accurate difference between prokaryotic and eukaryotic cells?

A secretory protein that exits from the ER within a vesicle will head directly to the:

The organelles of a eukaryotic cell are suspended in its ________.

Label the parts of the plant cell.

Only eukaryotic cells have membrane-bound organelles.

You owe your life to chloroplasts.The reason for this is that:

Cells can increase the number or size of some organelles in response to new demands.The amount of one organelle often is increased dramatically in the livers of alcoholics.Based on what you know of organelle function,this organelle is the:

Compare and contrast cilia and flagella.

Plasmodesmata allow plant cells to communicate with each other.

Tay-Sachs disease results from the accumulation of fatty deposits within neurons,when normally they should be broken down within these cells.The organelle that would be defective in Tay-Sachs would most likely be the:

The rough endoplasmic reticulum is the site where lipid synthesis occurs in an animal cell.

Which of the following would be found as part of a plant cell but not an animal cell?

Eukaryotic cilia and flagella: