Chapter 4 Unit Quiz
As a molecule moves through the plasma membrane it passes through
A hydrophilic later of phospholipid heads, then a hydrophobic layer of phospholipid tails, and then another hydrophilic layer of phospholipid heads.
Which of the following is a function of the nucleus?
Acts as the control center of the cell
Mitochondria and chloroplasts are similar in that they both _______________, but are different in that mitochondria, but not chloroplasts, _______________.
Are involved in energy conversion; are found in nearly all eukaryotic cells
A cell being observed under a microscope has a cell wall, plasma membrane, ribosomes, and chromosomal material that is not found in a nucleus. Based on this information, the cell could be a
Bacterial cell
Which statement below is correct when comparing plant and animal cells?
Both plant and animal cells have a plasma membrane, and plant cells also have a cell wall.
Chloroplasts and mitochondria are similar in that they both
Contain DNA
The stack of thylakoids labeled "A" in this figure is called
Granum
Carrie would like to observe the cilia on the surface of a live paramecium-a single-celled organism. The best device to do this would be a(n)
Light microscope
The cell walls of bacterial cells and plant cells function in
Maintaining cell shape
Which of the following is a correct matching of an organelle and its function?
Mitochondrion-Cellular Respiration
Which of the following structures would not be found only in a eukaryotic cell?
Nucleus
The nucleus has a double membrane that encloses the DNA. Inside the nucleus, the DNA acts as the template to produce mRNA and ribosomes. To exit the nucleus, these molecules must
Pass through pores that span both membranes.
What must materials pass through to enter or leave a cell?
Plasma membrane
Plant cells are connected to one another by
Plasmodesmata
Eukaryotic cells have DNA enclosed in a double membrane called the nucleus. The nucleus functions to
Separate the DNA from other activities that occur in the cytoplasm.
Which of the following allows eukaryotic and their organelles to move?
The cytoskeleton