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38 terms

Chapter 3

STUDY
PLAY
Which of the following is a major principle upon which cell theory is based
All organisms are made of cells.
Which organelle is the storehouse for most of a cell's genetic information?
nucleus
Which phrase best describes rough ER?
studded with ribosomes
Which organelles supply energy to the cell?
mitochondria
Which organelles contain enzymes that break down old cell parts?
lysosomes
Which organelles are unique to plant cells
chloroplasts
Which process occurs inside the chloroplasts?
photosynthesis
A protein that detects a signal molecule and performs an action in response is called a
receptor
A solution that is hypotonic to a cell has
fewer solutes than the cell.
Transport proteins play a role in both
passive and active transport.
Which process requires no energy from the cell?
facilitated diffusion
Which organelles are involved in the process called endocytosis?
vesicles
Which process is occurring when a vesicle fuses with the cell membrane and releases its contents outside the cell?
exocytosis
Cell theory establishes which of the following conclusions about cells?
all cells are produced by other living cells.
How is the cell shown in Figure 3.1 different from a prokaryotic cell?
it has a nucleus.
Which statement is true about a nucleus?
It is surrounded by a double membrane.
Which organelles are present both inside the nucleolus and on the surface of the ER?
ribosomes
Which phrase describes the function of the mitochondria?
supplies energy to the cell
Which organelles are involved in defending a cell against viruses?
lysosomes
Which features are found in plant cells but not in animal cells?
cell walls and chloroplasts
Mitochondria and chloroplasts are both sites of
energy conversion.
Which type of receptor binds to ligands that cannot enter the cell?
membrane
Water enters a cell when the solution surrounding the cell is
hypotonic to the cell.
Which of the following phrases best describes active transport
moves substance against concentration gradient
Which phrase best describes the process of facilitated diffusion?
requires no energy from the cell
Which organelles are involved in the process called endocytosis?
lysosomes and vesicles
Which sentence best describes exocytosis?
A vesicle fuses to the cell membrane and its contents leave the cell.
Which of the following does not require energy?
diffusion
Ions move through ion channels by
passive transport.
The diffusion of water into or out of a cell is called
osmosis.
Osmosis is a type of
passive transport.
How does water pass through the cell membrane?
through channel proteins just for water
Which of the following statements about an isotonic solution and a cell is correct?
The solution has the same solute concentration that the cytoplasm does.
Both active transport and facilitated diffusion involve
carrier proteins.
The sodium-potassium pump usually pumps
potassium ions into the cell.
Proteins and polysaccharides that are too large to move into a cell through diffusion or active transport move in by
endocytosis
Removing materials from a cell in vesicles is called
exocytosis.
Sugar molecules cross the cell membrane by
facilitated diffusion.