MMSC490 UPPDATED EXAMINATION SETS QUESTIONS
AND SOLUTIONS GUARANTEE A+
✔✔Chloroplasts are thought to have originated from endosymbiosis of _____ by a large
host cell.
a. Anaerobic bacteria
b. Photosynthetic eubacteria such as cyanobacteria
c. Fungi such as yeast
d. Non-photosynthetic aerobic bacteria - ✔✔b. photosythetic eubacteria such as
cyanobacteria
✔✔The genome of eukaryotes consists of genes derived from:
a. Archaebacteria alone
b. Bacteria alone
c. Both archaebacteria and bacteria
d. Neither archaebacteria nor bacteria - ✔✔c. both archaebacteria and bacteria
✔✔Which of the following is not a unicellular eukaryote?
a. Saccharomyces cerevisiae
b. Paramecium
c. Archaebacteria
d. Chlamydomonas - ✔✔c. archaebacteria
✔✔Solid tissues in animals include epithelial tissue, _______ tissue, nervous tissue,
and
muscle.
a. Blood
b. Connective
c. Ground
d. Epidermal - ✔✔b. connective
✔✔How many genes does an E. coli have?
a. 4,300
b. 6,000
c. 14,000
d. 20,000-25,000 - ✔✔a. 4,300
✔✔An E. coli cell under well-defined laboratory conditions divides about every:
a. 20 minutes
b. 2 hours
c. 12 hours
d. 24 hours - ✔✔a. 20 minutes
✔✔Which of the following are the most commonly used mammals for genetic studies?
,a. Humans
b. Xenopus laevis
c. Mice
d. Cats - ✔✔c. mice
✔✔What is the theoretical diffraction limit of resolution of a light microscope used to
look at a sample through oil?
a. 0.22 micrometer
b. 0.2 nm
c. 1 mm
d. 0.305 micrometer - ✔✔a. 0.22 um
✔✔In fluorescence microscopy, the immediate source of the light detected is light that
has been _____ the sample.
a. Absorbed by
b. Emitted by
c. Exciting
d. Scattered from - ✔✔b. emitted by
✔✔Which of the following is a high-resolution light microscope technique for detecting
interactions between proteins?
a. FRAP (fluorescence recovery after photobleaching)
b. FRET (fluorescence resonance energy transfer)
c. MPEM (multi-photon excitation microscopy)
d. Confocal microscopy - ✔✔b. FRET (fluorescence resonance energy transfer)
✔✔Transmission electron microscopy is used to:
a. Study in single, thin sections the shapes of whole cells
b. View living cells in three dimensions
c. View fluorescently labeled proteins in cells
d. Observe subcellular organelles and macromolecules - ✔✔d. observe subcellular
organelles and macromolecules
✔✔What is the smallest number of ultracentrifugation steps needed to separate nuclei
from ribosomes in a cellular lysate?
a. 1
b. 2
c. 4
d. 7 - ✔✔a. 1
✔✔Embryonic stem cells are different from primary cell cultures or permanent cell lines
derived from a tissue in that they are capable of:
a. Generating many cell types
b. Growing and dividing
c. Synthesizing their own DNA
,d. Transporting nutrients across their plasma membrane - ✔✔a. generating many cell
types
✔✔In contrast to animal cells, yeast or bacterial cell cultures can be grown on fairly
simple media without the need to add amino acids or various vitamins and hormones.
This is primarily because animal cells:
a. Typically live in association with other cells
b. Are less capable of transporting small molecules across their membranes
c. Come from organisms that have specialized cell types
d. Have too many genes to be able to keep track of the biosynthesis of needed
metabolites - ✔✔c. come from organisms that have specialized cell types
✔✔Approximately how many doublings can normal human fibroblasts undergo in
culture?
a. 5
b. 50 to 100
c. They will go on proliferating indefinitely
d. They will not double at all but dispersing them in culture allows them to be studied in
isolating from other cell types - ✔✔b. 50 to 100
✔✔Bacteriophages are:
a. A stain of gram-negative bacteria
b. Bacteria that phagocytose other competing bacteria
c. Bacterial lysosomes
d. Viruses that infect bacteria - ✔✔d. viruses that infect bacteria
✔✔Which of the following is not one of the four major classes or organic molecules in
the cell?
a. Carbohydrates
b. Lipids
c. Water
d. Proteins - ✔✔c. water
✔✔What is the major carbohydrate-storage molecule in plants?
a. Starch
b. Cellulose
c. Glycogen
d. Deoxyribonucleic acid - ✔✔a. starch
✔✔Introducing a double bond into a fatty acid has the effect of putting a(n) _____ into
the conformation of the molecule.
a. Amino acid bulge
b. Kink
c. Reverse spiral
, d. Reinforcing rod - ✔✔b. kink
✔✔Phospholipids consist of a 3-carbon core to which fatty acids and a phosphate group
are linked. The most common 3-carbon core is:
a. Dihydroxyacetone
b. Glyceraldehyde
c. Glycerol
d. Serine - ✔✔c. glycerol
✔✔Molecules that are partly water-soluble and partly water-insoluble are:
a. Hydrophilic
b. Amphipathic
c. Hydrophobic
d. Allosteric - ✔✔b. amphipathic
✔✔Cholesterol, a membrane lipid in animals, has a chemical structure similar to:
a. Estradiol
b. Phosphatidylinositol
c. Thymine
d. Triacylglycerol - ✔✔a. estradiol
✔✔Which of the following bases is not found in DNA?
a. Adenine
b. Cytosine
c. Thymine
d. Uracil - ✔✔d. uracil
✔✔How many common amino acids are there?
a. 5
b. 10
c. 20
d. 25 - ✔✔c. 20
✔✔A disulfide bond is formed between ____ residues.
a. Cysteine
b. Glycine
c. Methionine
d. Tyrosine - ✔✔a. cysteine
✔✔Which of the following classes of amino acids is buried within the folded structure of
the protein?
a. Acidic
b. Basic
c. Nonpolar
AND SOLUTIONS GUARANTEE A+
✔✔Chloroplasts are thought to have originated from endosymbiosis of _____ by a large
host cell.
a. Anaerobic bacteria
b. Photosynthetic eubacteria such as cyanobacteria
c. Fungi such as yeast
d. Non-photosynthetic aerobic bacteria - ✔✔b. photosythetic eubacteria such as
cyanobacteria
✔✔The genome of eukaryotes consists of genes derived from:
a. Archaebacteria alone
b. Bacteria alone
c. Both archaebacteria and bacteria
d. Neither archaebacteria nor bacteria - ✔✔c. both archaebacteria and bacteria
✔✔Which of the following is not a unicellular eukaryote?
a. Saccharomyces cerevisiae
b. Paramecium
c. Archaebacteria
d. Chlamydomonas - ✔✔c. archaebacteria
✔✔Solid tissues in animals include epithelial tissue, _______ tissue, nervous tissue,
and
muscle.
a. Blood
b. Connective
c. Ground
d. Epidermal - ✔✔b. connective
✔✔How many genes does an E. coli have?
a. 4,300
b. 6,000
c. 14,000
d. 20,000-25,000 - ✔✔a. 4,300
✔✔An E. coli cell under well-defined laboratory conditions divides about every:
a. 20 minutes
b. 2 hours
c. 12 hours
d. 24 hours - ✔✔a. 20 minutes
✔✔Which of the following are the most commonly used mammals for genetic studies?
,a. Humans
b. Xenopus laevis
c. Mice
d. Cats - ✔✔c. mice
✔✔What is the theoretical diffraction limit of resolution of a light microscope used to
look at a sample through oil?
a. 0.22 micrometer
b. 0.2 nm
c. 1 mm
d. 0.305 micrometer - ✔✔a. 0.22 um
✔✔In fluorescence microscopy, the immediate source of the light detected is light that
has been _____ the sample.
a. Absorbed by
b. Emitted by
c. Exciting
d. Scattered from - ✔✔b. emitted by
✔✔Which of the following is a high-resolution light microscope technique for detecting
interactions between proteins?
a. FRAP (fluorescence recovery after photobleaching)
b. FRET (fluorescence resonance energy transfer)
c. MPEM (multi-photon excitation microscopy)
d. Confocal microscopy - ✔✔b. FRET (fluorescence resonance energy transfer)
✔✔Transmission electron microscopy is used to:
a. Study in single, thin sections the shapes of whole cells
b. View living cells in three dimensions
c. View fluorescently labeled proteins in cells
d. Observe subcellular organelles and macromolecules - ✔✔d. observe subcellular
organelles and macromolecules
✔✔What is the smallest number of ultracentrifugation steps needed to separate nuclei
from ribosomes in a cellular lysate?
a. 1
b. 2
c. 4
d. 7 - ✔✔a. 1
✔✔Embryonic stem cells are different from primary cell cultures or permanent cell lines
derived from a tissue in that they are capable of:
a. Generating many cell types
b. Growing and dividing
c. Synthesizing their own DNA
,d. Transporting nutrients across their plasma membrane - ✔✔a. generating many cell
types
✔✔In contrast to animal cells, yeast or bacterial cell cultures can be grown on fairly
simple media without the need to add amino acids or various vitamins and hormones.
This is primarily because animal cells:
a. Typically live in association with other cells
b. Are less capable of transporting small molecules across their membranes
c. Come from organisms that have specialized cell types
d. Have too many genes to be able to keep track of the biosynthesis of needed
metabolites - ✔✔c. come from organisms that have specialized cell types
✔✔Approximately how many doublings can normal human fibroblasts undergo in
culture?
a. 5
b. 50 to 100
c. They will go on proliferating indefinitely
d. They will not double at all but dispersing them in culture allows them to be studied in
isolating from other cell types - ✔✔b. 50 to 100
✔✔Bacteriophages are:
a. A stain of gram-negative bacteria
b. Bacteria that phagocytose other competing bacteria
c. Bacterial lysosomes
d. Viruses that infect bacteria - ✔✔d. viruses that infect bacteria
✔✔Which of the following is not one of the four major classes or organic molecules in
the cell?
a. Carbohydrates
b. Lipids
c. Water
d. Proteins - ✔✔c. water
✔✔What is the major carbohydrate-storage molecule in plants?
a. Starch
b. Cellulose
c. Glycogen
d. Deoxyribonucleic acid - ✔✔a. starch
✔✔Introducing a double bond into a fatty acid has the effect of putting a(n) _____ into
the conformation of the molecule.
a. Amino acid bulge
b. Kink
c. Reverse spiral
, d. Reinforcing rod - ✔✔b. kink
✔✔Phospholipids consist of a 3-carbon core to which fatty acids and a phosphate group
are linked. The most common 3-carbon core is:
a. Dihydroxyacetone
b. Glyceraldehyde
c. Glycerol
d. Serine - ✔✔c. glycerol
✔✔Molecules that are partly water-soluble and partly water-insoluble are:
a. Hydrophilic
b. Amphipathic
c. Hydrophobic
d. Allosteric - ✔✔b. amphipathic
✔✔Cholesterol, a membrane lipid in animals, has a chemical structure similar to:
a. Estradiol
b. Phosphatidylinositol
c. Thymine
d. Triacylglycerol - ✔✔a. estradiol
✔✔Which of the following bases is not found in DNA?
a. Adenine
b. Cytosine
c. Thymine
d. Uracil - ✔✔d. uracil
✔✔How many common amino acids are there?
a. 5
b. 10
c. 20
d. 25 - ✔✔c. 20
✔✔A disulfide bond is formed between ____ residues.
a. Cysteine
b. Glycine
c. Methionine
d. Tyrosine - ✔✔a. cysteine
✔✔Which of the following classes of amino acids is buried within the folded structure of
the protein?
a. Acidic
b. Basic
c. Nonpolar
