EduNinjaHow would surface area, volume and surface area to volume ratio of a cell change as the cell becomes bigger, if the cell does not change shape?
Surface area
Volume
Surface area : volume
Increase
Increase
Increase
Increase
Increase
Decrease
Increase
Decrease
Decrease
Decrease
Increase
Increase
Which graph represents the change in cell surface area to volume ratio with increasing cell diameter?
The diagrams represent cells with the same concentration of dissolved substances in their cytoplasm. If all the cells were placed in the same hypertonic sucrose solution, which cell would show the greatest rate of change in the concentration of its cytoplasm?
Stargardt's is an inherited disease caused by the mutation of a gene associated with vitamin A processing in the eye. It results in degeneration of receptor cells and loss of vision. For what reason are stem cells suitable to treat this disease?
They can be taken from the eye of an embryo and transplanted into a patient.
They can produce vitamin A in newborn babies.
They can develop into receptor cells and prevent blindness.
They can be removed from an embryo to detect early onset of the disease.
In a cell, what is the effect of a large surface area to volume ratio?
Slower rate of exchange of waste materials
Faster heat loss
Faster rate of mitosis
Slower intake of food
What are stem cells?
Specialized cells that can be used therapeutically
Surplus cells taken from an embryo
Cells that retain their ability to divide and differentiate
Cells in the xylem and phloem tissues that support a plant
Which property makes stem cells suitable for therapeutic use?
They can divide by meiosis to form gametes.
They contain chemicals that can kill bacteria.
Their chromosomes are suitable for gene transfer and cloning.
They can differentiate into specialized cells.
How can cells in a multicellular organism differentiate?
They express some of their genes but not others.
They all have a different genetic composition.
Different cells contain a different set of chromosomes.
Different cells do not have some of the genes.
Which sequence has the cells arranged according to their ability to differentiate, starting fromthe least able?
bone marrow, neuron, embryonic, umbilical
neuron, bone marrow, umbilical, embryonic
umbilical, embryonic, bone marrow, neuron
embryonic, umbilical, bone marrow, neuron
What causes cells to differentiate?
Sufficient nutrition
Full expression of all genes
Specialized functions at different stages of embryo development
Expression of some genes with suppression of other genes