Cell Division GCSE

What is a stem cell?

• a meristem

• a zygote

• a differentiated cell

• an unspecialised cell

Which is not a source of embryonic stem cells?

• umbilical cord blood

• bone marrow

• aborted embryos

• amniotic fluid

What occurs during stage 2 of the cell cycle?

• the number of sub-cellular structures increases

• the nucleus divides

• the DNA replicates

• the cell divides

What is meant when you say that a cell has differentiated?

• cells have become enlarged

• cells have specialised to complete a particular function

• cells are unspecialised and can change to have any function

• cells have undergone cell division by mitosis

A cell has four chromosomes.

During the cell cycle, how many chromosomes will the cell

have at the end of stage 1?

• one

• four

• two

• eight

The drawing shows a plant root. What is the zone labelled X?

• zone of elongation

• zone of specialisation

• zone of cell division

• zone of differentiation

Tags

NGSS.MS-LS1-2

For which medical condition would stem cell treatment be ineffective?

• macular degeneration (eyesight deterioration)

• preventing HIV

• insulin production

• spinal cord injuries

What is the biggest disadvantage of using adult stem cells?

• it involves therapeutic cloning, which is very difficult

• they grow and divide very rapidly with the risk of causing cancer

• it may trigger an immune response

• some people may disagree for ethical reasons

At which stage of life does mitosis occur at a slower rate than cell death?

• developing embryo

• childhood

• old age

• adulthood

Where would you find the greatest concentration of

undifferentiated cells in a plant?

• in the phloem

• in the palisade layer in the leaf

• in the root tips

• in the xylem