DON’T PEAK AT ANSWERS TILL COMPLETE!!
1. (From Khan Academy) The tobacco mosaic virus (TMV) is a plant virus that infects a
wide range of plants, including tobacco. In order to enter and travel through the cells of a
plant, TMV produces a movement protein. This protein helps the virus travel directly
between the cytoplasms of interconnected plant cells.
a. The movement protein modifies the vacuoles within plant cells
b. The movement protein modifies the plasmodesmata between plant cells
c. The movement protein increases the formation of cell walls between plant cells
d. The movement protein increases the formation of transport vesicles within plant
cells
2. Histone 3 Lysine 9 is methylated and chromatin is closed, which protein is not
responsible?
a. Heterochromatin protein-1
b. Histone deacetylase
c. IgSF
d. None of the above
3. Dr. Shemanko asks her students to reprogram a somatic cell into liver cells. How can they
do it?
a. Insert somatic nucleus into liver environment, allow to grow ES cells, allow to
grow into blastocyst
b. Fuse the somatic nucleus into an enucleated oocyte, allow to grow ES cells,
induce ES cells in liver environment
c. Place somatic nucleus into egg, which will induce development into full embryo
which can then be isolated for its liver cells
d. Reprogramming somatic cells is not possible as it is far too differentiated
4. Professor Kandil discovers mutation BINGUSX331 that inhibits calcium from entering
intercellular junctions in the embryo of a mysterious frog species. What is a likely
consequence?
a. Inability of the ectoderm and mesoderm from early embryo to establish the spatial
order of different tissues
b. Decreased muscle contraction strength in the adult frog after maturation
c. Increased specific molecular interactions by cadherin-cadherin mediation
d. Both b and c
5. Match the cell interaction with its molecules (edit drawing or cut out):
, DON’T PEAK AT ANSWERS TILL COMPLETE!!
6. are responsible for cell-cell permeability attached to
a. Adherens junctions, keratin intermediate filaments
b. Tight junctions, actin
c. Desmosomes, actin
d. Desmosomes, keratin intermediate filaments
7. Rank the cell organization of tissues from least specialized (1) to most specialized (3)
a. Dead cornified cells, epidermis, dividing
b. Epidermidis, dividing, dead cornified cells
c. Dividing, epidermis, dead cornified
d. Epidermis, dividing, dead cornified cells
8. (From Khan Academy) To complete external fertilization in fish, sperm cells must swim
through open water in order to fertilize egg cells. During this process, females release a
substance called ovarian fluid, which helps guide the sperm cells toward the egg cells.
Researchers hypothesized that sperm cells are mainly attracted by ovarian fluid released
from the same species.
1. (From Khan Academy) The tobacco mosaic virus (TMV) is a plant virus that infects a
wide range of plants, including tobacco. In order to enter and travel through the cells of a
plant, TMV produces a movement protein. This protein helps the virus travel directly
between the cytoplasms of interconnected plant cells.
a. The movement protein modifies the vacuoles within plant cells
b. The movement protein modifies the plasmodesmata between plant cells
c. The movement protein increases the formation of cell walls between plant cells
d. The movement protein increases the formation of transport vesicles within plant
cells
2. Histone 3 Lysine 9 is methylated and chromatin is closed, which protein is not
responsible?
a. Heterochromatin protein-1
b. Histone deacetylase
c. IgSF
d. None of the above
3. Dr. Shemanko asks her students to reprogram a somatic cell into liver cells. How can they
do it?
a. Insert somatic nucleus into liver environment, allow to grow ES cells, allow to
grow into blastocyst
b. Fuse the somatic nucleus into an enucleated oocyte, allow to grow ES cells,
induce ES cells in liver environment
c. Place somatic nucleus into egg, which will induce development into full embryo
which can then be isolated for its liver cells
d. Reprogramming somatic cells is not possible as it is far too differentiated
4. Professor Kandil discovers mutation BINGUSX331 that inhibits calcium from entering
intercellular junctions in the embryo of a mysterious frog species. What is a likely
consequence?
a. Inability of the ectoderm and mesoderm from early embryo to establish the spatial
order of different tissues
b. Decreased muscle contraction strength in the adult frog after maturation
c. Increased specific molecular interactions by cadherin-cadherin mediation
d. Both b and c
5. Match the cell interaction with its molecules (edit drawing or cut out):
, DON’T PEAK AT ANSWERS TILL COMPLETE!!
6. are responsible for cell-cell permeability attached to
a. Adherens junctions, keratin intermediate filaments
b. Tight junctions, actin
c. Desmosomes, actin
d. Desmosomes, keratin intermediate filaments
7. Rank the cell organization of tissues from least specialized (1) to most specialized (3)
a. Dead cornified cells, epidermis, dividing
b. Epidermidis, dividing, dead cornified cells
c. Dividing, epidermis, dead cornified
d. Epidermis, dividing, dead cornified cells
8. (From Khan Academy) To complete external fertilization in fish, sperm cells must swim
through open water in order to fertilize egg cells. During this process, females release a
substance called ovarian fluid, which helps guide the sperm cells toward the egg cells.
Researchers hypothesized that sperm cells are mainly attracted by ovarian fluid released
from the same species.
