Which is an advantage of eukaryotic cell structure over prokaryotic cell structure? |
– Having so many membranous compartments enable eukaryotic cells to be impervious to the surrounding environment. |
In a multicellular organism, different cells are specialized for certain functions to help the whole organism maintain the living state. As cells differentiate to become specialized, the abundance of different organelles shifts to best serve those needs. Which organelle might be expected to be present in high abundance in a mammal’s muscle cells that must extract large amounts of energy from food molecules to support the work of muscle contraction? |
– Mitochondrion |
The correct order of movement of proteins through the Golgi apparatus is… |
– cis, medial, trans |
What happens to proteins as they pass through the Golgi apparatus? |
– Proteins are modified by having sugars attached or removed |
Besides the proteins being processed for distribution, what other components could be expected to be found inside the Golgi apparatus? |
– Enzymes |
A student discussing the role of the Golgi apparatus in cells makes the following three statements: A variety of proteins enter the Golgi from vesicles that pinch off from the rough ER. Evaluate the accuracy of the student’s statements. |
– The first and third statements are accurate; the second statement is not accurate |
One of the following, the ….., which is enclosed in a membrane, has the greatest amount of internal surface area. |
– Endoplasmic reticulum |
DNA strands are visualized using a(n)… |
– Electron microscope |
The organelles and biomolecules present in homogenized cells can be separated by centrifugation. Which of the following would be found at the top of a centrifugation gradient? |
– ATP molecules |
Prokaryotes… |
– Are surrounded by a cell membrane |
The proteins tha tmake up the cytoskeleton of bacteria are similar …… in eukaryotic cells. |
– Actin |
Which structure is known for its lack of nucleic acids? |
– Plant vacuole |
Some proteins that are on the surface of mammalian cells contain carbohydrates. These proteins are synthesized by _______ and the carbohydrates are added in the _______. |
– The rough endoplasmic reticulum; Golgi apparatus |
Which statement about the nucleus of animal cells is true? |
– DNA in the nucleus combines with proteins |
The endomembrane system… |
– Includes the Golgi apparatus and the endoplasmic reticulum |
Which organelles are involved in energy conversions? |
– Chloroplasts |
Liver cells are exposed to radioactive amino acids, making all proteins synthesized during this time radioactive. The cells are then removed at 5-minute intervals and fractionated. Where in the cells is the radioactively-labeled enzyme lipase performing its intracellular functions? |
– In lysosomes |
Which organelle(s) is/are found only in plants? |
– Glyoxysomes |
Which structure occupies the largest volume in a mature plant cell? |
– Vacuole |
Plastids are… |
– present in nearly all plant cells |
Which structure(s) is/are directly involved in the movement of organelles within a cell? |
– Microtubules |
Which protein(s) power(s) the movement of both cilia and vesicles within a cell? |
– Kinesin and dynein |
Cilia and eukaryotic flagella… |
– Must have a motor protein that uses the energy of ATP hydrolysis to power movement |
Amoeba proteus is injected with a drug that inhibits the formation of microtubules. What effect will this have on the organism’s movement? |
– The drug will have no effect on the organism’s movement |
The extracellular matrix of animal cells… |
– Contains proteoglycans |
The presence of _______ means that substances must pass through, rather than between, the epithelial cells that form the lining of the small intestine. |
– Tight junctions |
Bio-Ensci 251 Ch. 4 Practice Problems
Share This
Unfinished tasks keep piling up?
Let us complete them for you. Quickly and professionally.
Check Price