Chapter 6 and seven multiple choice Flashcards
Which of the following choices incorrectly matches a tool that biologists use to study cells with a type of experiment the tool might be used for
A) Scanning electron microscopy to study the detailed structure of the surfaces of cells
B) Transmission electron microscopy to study the distribution of organelles in a living cell
C) Transmission electron microscopy to study the ultrastructure features inside the cell
D) Light microscopy to study the movement of cells growing on a surface
B
Which of the following clues would tell you whether a cell is prokaryotic or eukaryotic?
A) The presence or absence of a rigid cell wall
B)Whether or not the cell is partitioned by internal membranes
C) The presence or absence of ribosomes
D)Whether or not the cell carries out cellular respiration
E)Whether or not the cell contains DNA
B
If one is trying to understand cellular function, what is the most important limitation associated with the study of isolated organelles?
A) Organelles can only function for a short time independently from the rest of the cell
B)Not every type of organelle is present in every cell
C) The membrane of the endomembrane system all have a common site of membrane and protein synthesis
D) Each organelle is responsible for a unique set of functions in the cell
E) In a functioning cell, organelles are not independent of eachother
E
A researcher wants to film the movement of chromosomes during cell division. Which type of microscope should he choose and why is it the best choice?
A) Light microscope, because of its high resolving power
B) Transmission electron microscope, because of its high magnifying power
C) Scanning electron microscope, because of its ability to visualize the surface of subcellular objects
D) Transmission electron microscope, because of its high resolving power
E) Light microscope,because the specimen is alive
E
Which statement about cell fractionation is incorrect?
A) The first step in cell fractionation is disruption of the cells and their organelles
B)Organelles that are largest or heaviest are likely to be isolated earlier in the fractionation procedure that those that are smaller or lighter
C) Organelles are separated by spinning the cell extract at several different speeds in centrifuge
D) When a cell extract is centrifuged, smaller organelles end up in the pellet at the bottom of the tube and larger organelles remain in the liquid above the pellet
E) Isolation of the smallest organelles (such as ribosomes) requires very high centrifuge speeds
D
Which statement(s) about the ratio of cell surface area to cell volume is (are) correct?
A) Because of limitations in the surface to volume ratio, larger organisms generally do not have larger volume cells when compared to smaller organisms
B) Cells involved in uptake of materials with their environment have large surface areas without greatly increasing their volume.
C) Cells with more convoluted surfaces have larger surface to volume ratios than cells with smooth surfaces
D)The first two answers are correct
E)The first three answers are correct
D
Of the following organelles associated with the endomembrane system, which group is primarily involved in synthesizing molecules needed by the cell?
A) Lysosome, vacuole, ribosome
B) Ribosome, rough endoplasmic reticulum, smooth ER
C)Vacuole, Rough ER, Smooth ER
D)Smooth Er, Ribosome, vacuole
E) Rough ER, Lysosome, vacuole
B
A plant was grown in a test tube containing radioactive nucleotides, the molecules from which DNA is built. Later examination of dividing cells in the plant showed the majority of the radioactivity to be concentrated in the \_\_\_ A)Rough ER B)Lysosome C)Smooth ER D)Nucleus
D
You would expect a cell with an extensive Golgi Apparatus to \_\_\_ A)Make a lot of ATP B) Secrete a lot of protein C)Move rapidly D)Perform Photosynthesis E)Store large quantities of ions
B
A researcher made an interesting observation about a protein made by the rough er and eventually used to build a cell's plasma membrane. The protein in the plasma membrane was actually slightly different from the protein made in the ER. The protein was probably altered in the \_\_\_\_\_ A) Golgi Aparratus B)Smooth ER C)Plasma membrane D)Transport vesicle E)Rough ER
A
Which of the following is (are) most likely to be involved in the process of producing proteins for a chloroplast or mitochondrion, neither of which is a part of the endomembrane system? A)Transport Vesicles B)Free cytoplasmic ribosomes C)The Golgi Apparatus D)Rough ER E)Smooth ER
B
Chloroplasts and mitochondria are thought to be of prokaryotic origin. One piece of evidence that supports this hypothesis is that these organelles contain prokaryotic-like ribosomes. These ribosomes are probably most similar to Ribosomes found A)Free in the cytoplasm of eukaryotes B)On the rough ER C) In bacterial cells D) The first two answers are correct D) The first three answers are correct
C
Which of the following is not a true statement about chloroplasts and mitochondria?
A) Each contains a small amount of DNA
B) Neither are components of the endomembrane system
C)Both are composed of two separate membranes
D)Each organelle synthesizes some of its own proteins
E) All of the above are correct
C
Which of the following is not a characteristic of mitochondria?
A) Mitochondria are involved in energy metabolism
B)Mitochondria have more that one membrane
C)Mitochondria contain DNA and ribosomes
D)Mitochondria are independent of the endomembrane system
E)All of the above are characteristics of mitochondria
E
The observation that chloroplasts and mitochondria each contain their own DNA and synthesize some of the proteins that function in these organelles suggests that chloroplast and mitochondria
A)Are produced by the nucleus of the cell
B)Must divide each time the cell containing them divides
C) Are part of the endomembrane system
D)Are involved in energy metabolism of the cell
E)Contain two or more membranes
B
