Question
During which stage does the cell surface area to volume ratio decrease?
A. Interphase
B. Metaphase
C. Telophase
D. Cytokinesis
Markscheme
A
| Date | November 2015 | Marks available | 1 | Reference code | 15N.1.HL.TZ0.5 |
| Level | Higher level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Question number | 5 | Adapted from | N/A |
Question
What describes nuclear division in stem cells?
A. Clonal selection
B. Mitosis
C. Cytokinesis
D. Meiosis
Markscheme
B
Examiners report
A high discrimination index and a high difficulty index shows this question proved to be difficult to many candidates but at the same time, good students answered well.
| Date | May 2013 | Marks available | 1 | Reference code | 13M.1.HL.TZ1.5 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 5 | Adapted from | N/A |
Question
Which phase of mitosis is shown in the photomicrograph?
A. Anaphase
B. Metaphase
C. Prophase
D. Telophase
Markscheme
B
| Date | May 2013 | Marks available | 1 | Reference code | 13M.1.HL.TZ2.5 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 5 | Adapted from | N/A |
Question
What actions occur during interphase?
A. DNA replication and RNA synthesis
B. Spindle formation and DNA replication
C. Chromosome alignment at the metaphase plate
D. Growth and separation of sister chromatids
Markscheme
A
| Date | November 2013 | Marks available | 1 | Reference code | 13N.1.HL.TZ0.5 |
| Level | Higher level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Question number | 5 | Adapted from | N/A |
Question
Which of the following processes take place during interphase in animal cells?
I. Spindle formation
II. Transcription and translation
III. Increase in numbers of mitochondria
A. I only
B. I and II only
C. II and III only
D. I, II and III
Markscheme
C
| Date | May 2011 | Marks available | 1 | Reference code | 11M.1.HL.TZ1.5 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 5 | Adapted from | N/A |
Question
The diagram below shows a cell during mitosis.
What are the structures and stage of mitosis?
Markscheme
D
| Date | May 2009 | Marks available | 1 | Reference code | 09M.1.HL.TZ1.4 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 4 | Adapted from | N/A |
Question
How do prokaryotic cells divide?
A. By mitosis
B. By meiosis
C. By budding
D. By binary fission
Markscheme
D
Examiners report
Some teachers believed that mitosis could be considered a correct answer for the prokaryotic cell division, but this mechanism only occurs in eukaryotes (it requires the presence of chromosomes). Most candidates did very well in this question and it was a very good discriminator.
| Date | May 2009 | Marks available | 1 | Reference code | 09M.1.HL.TZ1.6 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 6 | Adapted from | N/A |
Question
During which phase of the cell cycle do chromosomes duplicate?
A. G1
B. S
C. G2
D. Mitosis
Markscheme
B
| Date | May 2009 | Marks available | 1 | Reference code | 09M.1.HL.TZ2.5 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 5 | Adapted from | N/A |
Question
What is a difference between a cell in the G1 phase and a cell in the G2 phase of the cell cycle?
A. A cell in the G2 phase would be smaller than a cell in the G1 phase.
B. A cell in the G2 phase would have more mitochondria than a cell in the G1 phase.
C. A cell in the G1 phase would have more DNA in its chromosomes than a cell in the G2 phase.
D. DNA replication occurs in the G1 phase but not in the G2 phase.
Markscheme
B
Examiners report
This question required the candidates to know what occurs during the cell cycle. Good candidates were able to answer this question correctly.
| Date | May 2010 | Marks available | 1 | Reference code | 10M.1.HL.TZ1.5 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Determine | Question number | 5 | Adapted from | N/A |
Question
Which of the following take(s) place during interphase and mitosis in animal cells?
I. Re-formation of nuclear membranes
II. Pairing of homologous chromosomes
III. DNA replication
A. I only
B. I and II only
C. II and III only
D. I and III only
Markscheme
D
Examiners report
This question discriminated well. Many candidates answered the correct option, but many went for C. This clearly showed they did not know the difference between mitosis and meiosis. The question may have been badly worded, as candidates might have been looking for a process that occurred in both the stages rather than either of them. In this case there would have been no correct answer.
| Date | November 2012 | Marks available | 1 | Reference code | 12N.1.HL.TZ0.4 |
| Level | Higher level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Question number | 4 | Adapted from | N/A |
Question
The following events occur in mitosis.
X: Attachment of spindle microtubules to centromeres
Y: Movement of sister chromatids to opposite poles
Z: Supercoiling of chromosomes
What is the correct sequence of events?
A. X → Z → Y
B. X → Y → Z
C. Z → X → Y
D. Z → Y → X
Markscheme
C
| Date | May 2017 | Marks available | 1 | Reference code | 17M.1.HL.TZ1.4 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 4 | Adapted from | N/A |
Question
The diagram shows the concentration of four cyclins during the cell cycle. Which curve represents the cyclin that promotes the assembly of the mitotic spindle?
Markscheme
D
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