Biology Revision Finals - Paper
1 Questions With Expert Written
& Verified Solutions | UPDATED
What is mitosis? What is it used for?
1 mother cell splits into 2 daughter cells. Growth and repair
What are the four stags of mitosis? Acronym:
Pee (on the) MAT
Prophase, metaphase, anaphase, telophase
What is the cell cycle?
the life cycle of a cell
What are chromosomes? Where are they found?
Coiled up lengths of DNA molecules. Found In nucleus
What is the total number of chromosomes that we have?
46 - 23 from mother, 23 from father
What is meiosis?
1 mother cell splits into 4 cells with half of the original amount of
genetic information
What are the five stages of meiosis? Acronym:
I Pee (on the) MAT
Interphase, prophase, metaphase, anaphase, telophase
What is binary fission?
A form of asexual reproduction in prokaryotic cells
What are the steps of binary fission?
1. DNA replication
2. cell elongation
3. septation
4. cell pinches off
When do cells typically divide?
When an organism grows, to replace damaged cells
Before dividing (mitosis), what must a cell do?
Duplicate its genetic information
Eukaryotic cell is..? Remember:
"Eu" - You
A cell that contains a nucleus
00:0203:35
What are plasmids?
Small, circular DNA molecules found in bacteria
What is a stem cell?
an undifferentiated cell. A cell which has not yet become specialised is
called unspecialised
What is differentiation?
the process by which cells become specialised
What is therapeutic cloning?
- An embryo could be made to have the same genetic information as
the patient
- The stem cells produced from it would also contain the same genes
- They wouldn't be rejected by the patient's body if used to replace
faulty cells
What are the issues with stem cells?
- May not be able to b
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