Key Concepts Quiz
This activity contains 24 questions.
The eyepiece of a light microscope has a magnification level of 10x. If you were looking at a paramecium under the lowest-power objective (4x), what would be the total magnification of the microscope at this setting?
If you wished to observe a white blood cell as it engulfed a viral particle, which type of microscope would you choose?
scanning electron microscope
transmission electron microscope
A 100 mm x 100 mm x 100 mm cell has a surface area that is _____ and a volume that is _____ . A second cell, that is 10 mm x 10 mm x 10 mm, has a _____ surface-to-volume ratio when compared to the first cell.
… 1,000,000 mm
… 1,000,000 mm
… 1,000 mm
… 1,000,000 mm
Which of the following would distinguish a bacterial cell from an animal cell?
production of proteins
presence of a plasma membrane
presence of a cell wall
replication of DNA
Which of the following organelles is found only in animal cells?
You have identified a new organism. It has ribosomes, a cell membrane, and cell walls made of cellulose. This new organism is most likely a(n) _____.
Protein synthesis requires several components, several of which are constructed in the nucleus. Which is the only macromolecule involved that enters the nucleus, is modified, and then leaves via the nuclear pores?
What do the rough endoplasmic reticulum, Golgi apparatus, and lysosomes have in common?
They all perform similar roles in the cell.
They are all physically connected to each other.
They are constructed of interrelated membranes.
All are located in the nucleus of the cell.
What changes would you expect to see in the liver cells of someone suffering from chronic alcoholism?
increased levels of endoplasmic reticulum activity
decreased levels of nuclear permeability
increased levels of mitochondrial activity
decreased levels of DNA synthesis
How are cell surface proteins exported out of the cell?
The proteins are packaged into vesicles for transport to the lysosomes.
The protein will be modified with the addition of a monosaccharide.
The protein will be sent to the smooth endoplasmic reticulum to be sorted for its final destination.
The protein is folded, then packaged for transport to the Golgi apparatus.
What is the relationship between the Golgi apparatus and the plasma membrane?
The plasma membrane stops the products of the Golgi apparatus from leaving the cell.
The Golgi apparatus begins the formation of the lipids that make up plasma membranes.
The finished products of the Golgi apparatus may leave the cell through vesicles that fuse with the plasma membrane.
The membranes of the Golgi apparatus and the plasma membrane are continuous.
Which is a typical function of lysosomes?
breaking down of damaged organelles, such as chloroplasts
keeping bacteria within a safe, contained environment
rebuilding macromolecules, such as glycoproteins
storage of food particles for energy purposes
The cells of a person with adrenoleukodystrophy (ALD) swell with a buildup of fatty acids. Which organelle is most likely failing to function correctly?
One function of the central vacuole in plants is growth. The central vacuole grows larger when there is an increase in the amount of stored material. An animal cell does not grow by this method. What is the essential difference between animals and plants that requires the central vacuole?
The plant cell wall provides a more rigid structure.
Plant cells cannot divide.
Plant cells grow at a slower rate than animal cells.
Animal cells have a similar organelle that produces the same effect as the central vacuole.
Which of the following structures are essential for the successful operation of the endomembrane system?
Some eukaryotic cells lose organelles as they mature. Which eukaryotic cell would most likely have lost certain organelles, including mitochondria?
a plant leaf cell that is actively undergoing photosynthesis
a cell in the liver that converts toxins to less harmful substances
a bacterial cell dividing under optimal conditions
a human red blood cell that transports as many oxygen molecules as possible
What mitochondrial feature enhances cellular respiration?
Many researchers think that the first eukaryotic cells consumed the organic compounds needed for life-sustaining functions. Given this information, which of the following organelles most likely appeared last in eukaryotic cells?
Which of the following cytoplasmic structures function in the transport of vesicles from the endoplasmic reticulum to the Golgi apparatus?
In human females, an ovum (egg cell) is not released directly from the ovary into the oviduct. Which mechanism below is the best explanation for how the ovum makes it into the oviduct?
An ovum has a flagellum that propels it into the oviduct.
Cilia located at the opening of the oviduct capture the ovum in a sweeping motion.
Flagella located at the opening of the oviduct capture the ovum in a sweeping motion.
An ovum has pili that allow it to attach to the oviduct.
During a bacterial infection, signals are produced that communicate with the nucleus via molecules found on the surface of specific cells. This allows for the recruitment of white blood cells. What molecules are communicating with the nucleus?
Which tissue would likely contain large amounts of anchoring junctions?
The plasma membrane would fit into which general function category?
support, movement, and communication
Which cell structure is responsible for metabolism?
smooth endoplasmic reticulum
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