MYP Biology Cell Division Exam Style Questions
IB myp 4-5 Biology – Practice Questions- All Topics
Cell division – Middle Year Program -Biology
Topic :Evolution– Weightage : 21 %
All Questions for Topic : Life Cycles,Natural Selection,Cell division,Mitosis,Meiosis,Reproduction,Biodiversity,Inheritance and variation,DNA and genetics
Question (4 marks)
Loud noises, including loud music, cause damage to hair cells which results in gradual hearing loss. Damaged or dead hair cells cannot be replaced through cell division so the hearing loss is permanent.
State the names of the two different types of cell division and list two differences.
| Type of cell division 1 | Type of cell division 2 | |
| Name | ||
| Difference 1 | ||
| Difference 2 |
Loss of hearing can also be observed in young children. This loss of hearing can be caused by events during birth, it can develop later in life or it can be inherited. During birth, for example, an extended shortage in oxygen supply can damage hair cells while muscle cells are not affected.
▶️Answer/Explanation
Ans:
Type of cell division 1 – Mitosis
Type of cell division 2 –Meiosis
Any two valid pairs of differences (2 max), for example:
• 2 vs 4 cells (are produced)
• genetically identical vs not genetically identical
• same number of chromosomes as mother cells/diploid vs halved number of chromosomes/haploid
• somatic cells vs gametes (are produced).
Question:
If you wanted to make a model of a 20 μm diameter cell, how wide would the model have to be, to give it the same size ratio as you calculated in Question 1?
▶️Answer/Explanation
Ans: 20 micrometres x 1,000 = 20,000 micrometres; = 20 millimetres.
Question:
What is the advantage of making the size ratio for the diameter and the membrane thickness the same?
▶️Answer/Explanation
Ans: Scale model; more realistic; more likely to behave like the thing being modelled.
Question:
What would happen if a cell divided repeatedly without enlarging?
▶️Answer/Explanation
Ans: The cell would become smaller and smaller.