Bio Chapter 6

Which of the following statements contributes least to the argument that mitochondria and chloroplasts evolved from prokaryotic endosymbionts?

Both the matrix and stromal spaces of these organelles contain many types of soluble proteins.

Which protein is not made at the rough ER?

A protein that enters the nucleus to bind with DNA

If you were fractionating cells using centrifugation and mixed up your fractions, what would you look for to identify the first fraction collected?

Nuclei

A eukaryotic cell carries out phagocytosis and engulfs a bacterial cell, which ends up in the resulting food vacuole. To go from the cytosol of this bacterial cell to outside of the eukaryotic cell that has taken it in, what is the least number of biological membranes that would have to be crossed?

3

If extracellular matrices and cell walls provide protection from pathogenic microbes that attempt to enter the cell, what size should the pores in the structures shown in this figure be?

40nm

What kind of cell would you be examining if you identified fimbriae?

Bacterial

Taxol, a drug approved for the treatment of breast cancer, prevents depolymerization of microtubules. With what cellular function might Taxol interfere?

Chromosome movements in cell division

A large plant cell will have proportionally a large amount of which protein?

Myosin

If you were using compartment-specific stains and found that a stain for the nuclear envelope lightly stained another compartment as well, what would that other compartment be?

Endoplasmic reticulum

Where are enzymes responsible for biosynthesis of membrane lipids located?

Endoplasmic reticulum

If you were looking at electron micrographs and saw an organelle with multiple concentric membranes, at what might you be looking?

Not enough information is given to be able to answer

If you were studying mutant cells and found that many proteins are going to the wrong compartments in these cells, where is the mutation having the greatest effect?

Golgi apparatus

Which of the following correctly lists the objects in order from largest to smallest?

Human body, frog egg, mitochondrion, lipid

Brefeldin A is a drug that disrupts transport from the ER to the Golgi apparatus. What other organelles and membranes in an animal cell would be affected by this drug?

Lysosomes, transport vesicles, plasma membrane, nuclear membranes

Alcohol is destroyed in the cell by the removal of hydrogen atoms. Where does this occur?

Peroxisome

Which structure is common to all three domains of life?

Phospholipid bilayer cell membrane

What is the correct order of the exocytosis or secretion pathway?

Rough ER, Golgi apparatus, transport vesicle, plasma membrane