Bio ch. 6
Which of the following frequently imposes a limit on a cell size
ratios of surface area to volume
The structure that regulates the passage of material into and out of this bacterial cell is indicated by the letter ____
C The plasma membrane is selectively permeable.
Choose the fundamental characteristics of life
?
Complete the scheme of the integration of the main functions preformed by the organelles of a cell
?
Which of the following will have the greatest ratio of surface area to volume
A box that is 1×1×1.
What cell structures best reveal evolutionary unity
Biological membranes Ribosomes
Which organelle often takes up much of the volume of a plant cell
Central vacuole
____ variety are seen primarily only in ____ A very specialized adaptation seen in the fat storing tissues of ____ is the ______ which contains enzymes that break down _____ providing an energy source
Cilia and flagella of the "9+2" Motile eukaryotes Plant seeds Glyoxysome Fatty acids
The DNA containing region of this bacterial cell is indicated by the letter
D The nucleoid region contains DNA.
Which of the following options best depicts the flow of information when a gene directs the synthesis of a cellular component
DNA -> RNA -> Protein
Which of the following is a major difference between prokaryotic cells and eukaryotic cells
Eukaryotic cells have membrane-bound organelles, while prokaryotic cells do not.
Which of the following are surface appendages that allow a bacterium to stick to a surface
Fimbriae
How does a cell display the fundamental characteristics of life
It is possible because all the functions performed by the individual structures and organelles of a cell are integrated.
Why does the phenomenon called "life" appear only at the level of the cell and not at the level of an organelle or an even smaller level?
Not one of the cellular components could exist indefinitely on its own. Organelles should interact with each other to function properly.
A cell with a predominance of rough endoplasmic reticulum is most likely involved in which if the following processes
Producing large quantities of proteins for secretion
What is a function of a bacterium's capsule
Protection
You have a cube of modeling clay in your hands. Which of the following changes to the shape of this cube of clay will decrease its surface area relative to its volume?
Round the clay up into a sphere.
The liver is involved in detoxification of many poisons and drugs. Which of the following structures is primarily involved in this process and therefore abundant in liver cells
Smooth ER
What name is given to the rigid structure found outside the plasma membrane that surrounds and supports the bacterial cell
cell wall
Thylakoids, DNA, and ribosomes are all components found in
chloroplasts
Motor proteins provide for molecular motion in cells by interacting with what types of cellular structures?
components of the cytoskeleton
The evolution of eukaryotic cells most likely involved
endosymbiosis of an oxygen using bacterium in a larger host cell-the endosymbiont evolved into mitochondria.
An early step in the evolution of eukaryotic cells most likely involved which of the following events
endosymbiosis of an oxygen-using bacterium in a larger bacterial host cell-the endosymbiont evolved into mitochondria
Ions can travel directly from the cytoplasm of one animal cell to the cytoplasm of an adjacent cell through
gap junctions
One difference between eukaryotic and prokaryotic cells is that eukaryotic cells
have membrane-enclosed organelles, which are lacking in prokaryotic cells.
One primary advantage of light microscopy over electron microscopy is that ________.
light microscopy allows the visualization of dynamic processes in living cells
Which of the following statements describes a major advantage of light microscopy over electron microscopy
light microscopy allows the visualization of dynamic processes in living cells
Which structure is common to plant and animal cells?
mitochondria
Which organelle is the primary site of ATP synthesis in eukaryotic cells?
mitochondrion
Which structure is common to plant and animal cells?
mitochondrion
Suppose a cell has the following molecules and structures: enzymes, DNA, ribosomes, plasma membrane, and mitochondria. It could be a cell from _____.
nearly any eukaryotic organism
Where is a bacterial cell's DNA found?
nucleoid region
Mitochondria are found in
plant and animal cells
The _____ is the bacterial structure that acts as a selective barrier allowing nutrients to enter the cell and wastes to leave the cell
plasma membrane
In a bacterium, where are proteins synthesized?
ribosomes