2.3 - Test mistakes Flashcards

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1
Q

Why are species that reproduce asexually genetically identical to their parents?

A

Asexual reproduction occurs due to mitosis
When DNA replication takes place
Sister chromatids divided equally into each cell
Therefore cells have no genetic variation

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2
Q

Explain the role of DNA ligase in DNA replication?

A

Repairs breaks in phosphodiester backbone
By forming phosphodiester bonds
Between phosphate and sugar

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3
Q

Why is it important to make sure an appropriate stain is used when observing cells?

A

Stain is used to see chromosomes that aren’t usually visible
Stains attach to chromosomes

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4
Q

The role of the cell cycle

A

Increase cell numbers
Produce clones

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5
Q

How will the cell cycle be affected if cells become cancerous?

A

Shorter G phase
Faster cycle
Cells don’t become specialised

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