Question 1
The last giant Galapagos tortoise died in 2012. Scientists froze some of the tortoise’s cells.
These statements describe processes involved in potential cloning of the giant Galapagos tortoise using the cells. They are not in the correct order.
1 - a donor egg is enucleated
2 - the embryo develops into a mature egg, which is incubated
3 - a somatic cell from the tortoise is defrosted and the nucleus is removed
4 - electrofusion of the host cell and new nucleus
5 - the somatic cell nucleus is inserted into the enucleated oocyte
6 - the transformed egg divides in vitro
Which option states the correct order for producing a clone of the giant Galapagos tortoise?
1, 3, 4, 5, 6, 2
3, 5, 1, 4, 2, 6
1, 6, 3, 5, 4, 2
3, 1, 5, 4, 6, 2
|
Question 2
What is not a valid concern about the use of genetic modification?
that antibiotic resistance genes could transfer to pathogenic bacteria
that herbicide resistance genes could be transferred to wild species
that certain seeds might not be available for use by poor farmers
that the use of human embryos in stem cell production is unethical
|
Question 3
What is an example of a plant that reproduces using tubers?
strawberries
potatoes
bamboo
onions
|
Question 4
What is the purpose of using a rooting hormone in plant cuttings?
to encourage leaf development
to promote flower blossoming
to induce root formation
to increase fruit yield
|
Question 5
Why are immobilised enzymes advantageous in industry?
they can be easily separated from the products
they have a slower reaction rate
they are more expensive
they use higher temperatures to function
|
Question 6
What is a potential downside of using artificial embryo twinning for cloning?
it can produce a high number of clones quickly
it is more expensive than natural twinning
it cannot be applied to endangered species
it only works with specific species
|
Question 7
Which statement best describes somatic cell nuclear transfer (SCNT)?
a technique that uses reproductive cells to clone animals
a method of cloning animals by splitting embryos
a process where a body cell nucleus is inserted into an enucleated egg
a form of cloning that involves the use of stem cells from adult animals
|
Question 8
What is the primary benefit of tissue culture in plant cloning?
it enables rapid production of many cloned plants
it allows for the production of fruits without seeds
it produces plants with a higher genetic variability
it creates plants that can grow without soil
|
Question 9
What is a key characteristic of stolons compared to rhizomes?
they grow horizontally underground
they are large underground plant structures that store food
they develop from the main nodes of a parent plant
they grow above ground on the surface of the soil
|
Question 10
What does vegetative propagation in plants primarily involve?
the use of seeds to produce new plants
the production of plants from non-reproductive tissues
cross-pollination between different plant species
grafting new plant varieties onto existing rootstock
|