pigment is stored in membranous sacs called thylakoidsthat are arranged in stacks
called grana.
CENTRIOLE
Acentrioleis a pair of cylindrical structures near the nucleus that is comprised
of microtubules and aids in the formation of flagella and cilia. The centriole also
has a part in eukaryotic cell division.
Quiz
- A gram-positive cell wall has
(a) many layers of peptidoglygan, which repels the crystal of violet dye
when the cell is stained
(b) many layers of peptidoglygan, which retains the crystal of violet dye
when the cell is stained
(c) one layer of peptidoglygan, which retains the crystal of violet dye
when the cell is stained
(d) one layer of peptidoglygan, which repels the crystal of violet dye
when the cell is stained - A cytoplasmic membrane is
(a) a membrane that provides a selective barrier between the nucleus
and the cell’s internal structures
(b) the cell wall
(c) a membrane that provides a barrier between the cell’s internal
structures
(d) a membrane that provides a selective barrier between the cell wall and
the cell’s internal structures - Amphipathic means
(a) that the cytoplasmic membrane of a cell is bilayered and contains
both polar and nonpolar parts
(b) that the cytoplasmic membrane of a cell is unilayered and contains
polar parts
(c) that the cytoplasmic membrane of a cell is unilayered and contains
nonpolar parts
(d) that the cytoplasmic membrane of a cell is resistant to all substances
residing outside the cell
CHAPTER 4 Prokaryotic and Eukaryotic Cells^83