26. Which of the following is the best microscope to use to visualize a cross section of skin
stained so that the cells are purple and the extracellular matrix is pink:
a. Light microscope
b. Confocal microscope
c. Transmission electron microscope
d. Scanning electron microscope
e. Fluorescence microscope
27. Which of the following is the best microscope to use in order to visualize cell to cell
junctions at high magnification:
a. Light microscope
b. Confocal microscope
c. Transmission electron microscope
d. Scanning electron microscope
e. Fluorescence microscope
28. A student is studying the tensile strength of a new metallic alloy. He wants to visualize
the fracture surfaces following tensile testing. Which is the best microscope for this
application:
a. Light microscope
b. Confocal microscope
c. Transmission electron microscope
d. Scanning electron microscope
e. Fluorescence microscope
29. A graduate student is studying the degradation properties of a new polymer that she
developed. She adds a fluorescent molecule to the polymer backbone and makes a thin
layer of the polymer on a glass slide. In order to visualize the polymer and measure its
degradation/disappearance over time, which is the best microscope to use:
a. Light microscope
b. Confocal microscope
c. Transmission electron microscope
d. Scanning electron microscope
e. Fluorescence microscope
30. Endothelial cells were exposed to experimental conditions and are imaged intact under a
microscope following antibody labeling of NF-κB, a protein located inside endothelial
cells. Select the following statement that best describes the approach that should be
used to image the endothelial cells in this experiment.
a. Cells are imaged under a transmission electron microscope.
b. Cells are imaged using phase-contrast in the light microscope.
c. Cells are imaged under a fluorescence microscope.
d. Cells are imaged under a scanning electron microscope.
26. Which of the following is the best microscope to use to visualize a cross section of skin
stained so that the cells are purple and the extracellular matrix is pink:
a. Light microscope
b. Confocal microscope
c. Transmission electron microscope
d. Scanning electron microscope
e. Fluorescence microscope
27. Which of the following is the best microscope to use in order to visualize cell to cell
junctions at high magnification:
a. Light microscope
b. Confocal microscope
c. Transmission electron microscope
d. Scanning electron microscope
e. Fluorescence microscope
28. A student is studying the tensile strength of a new metallic alloy. He wants to visualize
the fracture surfaces following tensile testing. Which is the best microscope for this
application:
a. Light microscope
b. Confocal microscope
c. Transmission electron microscope
d. Scanning electron microscope
e. Fluorescence microscope
29. A graduate student is studying the degradation properties of a new polymer that she
developed. She adds a fluorescent molecule to the polymer backbone and makes a thin
layer of the polymer on a glass slide. In order to visualize the polymer and measure its
degradation/disappearance over time, which is the best microscope to use:
a. Light microscope
b. Confocal microscope
c. Transmission electron microscope
d. Scanning electron microscope
e. Fluorescence microscope
30. Endothelial cells were exposed to experimental conditions and are imaged intact under a
microscope following antibody labeling of NF-κB, a protein located inside endothelial
cells. Select the following statement that best describes the approach that should be
used to image the endothelial cells in this experiment.
a. Cells are imaged under a transmission electron microscope.
b. Cells are imaged using phase-contrast in the light microscope.
c. Cells are imaged under a fluorescence microscope.
d. Cells are imaged under a scanning electron microscope.
Related textbook solutions
Related questions
Material Science
Question 1
Muscle fibers slide smoothly across each other in both directions.
True
False
Question 2
Cell membranes are composed of single layers of fat molecules.
True
False
Question 3
In mammals, the percentage composition of fats and minerals is roughly the same.
True
False
Question 4
Both RNA and DNA have a double helix structure.
True
False
Question 5
The primary constituents of muscles are
| a) | the proteins kerotin and actin | |
| b) | the proteins lycine and actin | |
| c) | the proteins actin and liposine | |
| d) | the proteins glycine and lycine | |
| e) | the proteins myocin and actin |
Question 6
Hydroxyapatite is a component of endoskeletons.
True
False
Question 7
There are thousands of types of amino acids.
True
False
Question 8
Amorphous silicon is a component of some biomaterials.
True
False
Question 9
The biosynthesis of both collagen and polysaccharides starts in the cell nucleus.
True
False
Question 10
After going through alkyline hydrolysis, the remaining solids are primarily hydroxyapatite.
True
False
Question 11
Calcium carbonate is a mineral found in some biomaterials.
True
False
Question 12
Proteins, chitin, and cellulose are build up from proteins
True
False
Question 13
There are thousands of types of proteins.
True
False
Question 14
Chitin is the most abundant natural polymer.
True
False
Question 15
Keratin is formed from a structure of living cells.
True
False
Question 16
Some biopolymers are hard.
True
False
Question 17
Polymeric biomaterials are comprised of collagen and elastin.
True
False
Question 18
Cell membranes are made of double layers of proteins.
True
False
Question 19
Which is NOT an example of a hard biopolymer?
| a)Eggs | ||
| b)Insect Shells | ||
| c)Hooves | ||
| d)Nails | ||
| e)Cellulose |
Question 20
Polysaccharides are built up hierarchically from amino acids.
True
False
Question 21
Unit cells have faces that are
| a) | rhombus | |
| b) | square | |
| c) | rectangular | |
| d) | parallelegrams | |
| e) | circular |
Question 22
Unit cells are
| a)the building blocks of crystalline material | ||
| b)the building blocks of DNA | ||
| c)the building blocks of polymers | ||
| d)the building blocks of amorphous materials | ||
| e)the building blocks of biomaterials |
Question 23
Which radioactive semi-metal is the only element with a Simple-Cubic (SC) structure?
| a)Polonium | ||
| b)Uranium | ||
| c)Radium | ||
| d)Plutonium | ||
| e)Dilthium |
Question 24
The common crystal structures in metal are
| a)FCC, BCC, HCP | ||
| b)FCC, BCC, HCP, and SC | ||
| c)HCC, BCC, FCP | ||
| d)HCC, BCC, FCP and SC | ||
| e)FCC, SEC, BCC |
Question 25
Diffraction results in
| a)constructive interference | ||
| b)delamination of the planes | ||
| c)reverse polarization | ||
| d)altered planar spacing | ||
| e)destructive interference |
Question 26
Unit cell indexing schemes provide
| a)location information for grain boundaries | ||
| b)descriptions of the atoms, planes, and axis directions | ||
| c)diffraction indexes for the crystal material | ||
| d)the location of the unit cell in the larger crystalline matrix | ||
| e)the packing arrangement |
Question 27
Hexagonal crystal structures cannot be close-packed.
True
False
Question 28
To determine crystal structure and spacing, scientists use
| a)magnetic resonance imaging | ||
| b)X-ray diffraction | ||
| c)optical microscopes | ||
| d)scanning electron microscopes | ||
| e)atomic force microscopes |
Question 29
A scanning probe (aka atomic force) microscope can be used to image and manipulate individual atoms.
True
False
Question 30
Crystal planar density is taken as
| a)the number of atoms per unit area for a plane | ||
| b)the planar stacking order | ||
| c)the number of atoms that are closely packed | ||
| d)the number of equivalent atoms per unit cell | ||
| e)the number of atoms per unit length for an axis |
Question 31
The atomic packing factor represents
| a)the mass ratio of the unit cell | ||
| b)the number of nearest-neighbor atoms | ||
| c)the fraction of solid sphere volume in the unit cell | ||
| d)the unit cell edge length (a) divided by the atomic radius (R) | ||
| e)the density of the material |
Question 32
When an elemental solid can have more than one crystal structure, it is said to have
| a)allotropy | ||
| b)polymorphism | ||
| c)polytropy | ||
| d)elemorphism | ||
| e)anthropomorphis |
Question 33
The crystallographic linear density
| a)is determined by the atomic packing factor | ||
| b)is six for HCP unit cells | ||
| c)is five for BCP unit cells | ||
| d)is determined by the coordination number | ||
| e)is how many atoms lie along a unit length in that direction |
Question 34
Bragg's law specifies
| a)the condition for when electrons will be refracted upon striking a crystal | ||
| b)the condition for when light will be polarized upon striking a crystal | ||
| c)the condition for when x-rays will be absorbed upon striking a crystal | ||
| d)the condition for when x-rays will be refracted upon striking a crystal | ||
| e)the condition for when light will be refracted upon striking a crystal |
Question 35
Two features of a crystal unit cell structure are
| a)atomic number and elemental packing factor | ||
| b)the number of interstitial and host atoms | ||
| c)coordination number and atomic packing factor | ||
| d)the number of faces and the number of atoms | ||
| e)the number of substitutional and interstitial atoms |
Question 36
Imperfections in semiconductors are used to create transistors and other electronic devices.
True
False
Question 37
The majority of crystalline solids are single crystals
True
False
Question 38
The grain structure of a polycrystalline material can be observed in the material without significant preparation.
True
False
Question 39
There are three types of electron microscopes, Transmission (TEM), Scanning (SEM), and Tunneling (TUEM).
True
False
Question 40
Defects are important for solid catalysts
True
False
Question 41
The mean intercept length is a measure of grain diameter.
True
False
Question 42
Imperfections in materials do not generally change their properties.
True
False
Question 43
The mean intercept length is computed from the average length of a grain boundary edge.
True
False
Question 44
Catalysts chemically combine with the reactant molecules in order to speed up the reaction.
True
False
Question 45
For a particular material, the higher the temperature the greater the number of vacancies.
True
False
Question 46
A twin boundary is a linear defect where the screw angles on each side of the boundary are equal.
True
False
Question 47
The regular pattern of crystal order is disrupted at a grain boundary.
True
False
Question 48
Solid solutions can only be formed by liquid material cooling to a solid.
True
False
Question 49
Alloys do not usually have significantly difference properties of the constituent metals.
True
False
Question 50
When an atom is missing from a crystal structure position, it is referred to as a self-interstitial.
True
False
