Question 1
[Maximum number: 1]
Which function is accomplished by structures X and Y in the Paramecium?
IB Biology HL A2.2 Cell structure Question Bank
A2.2 Cell structure
- A2.2.1—Cells as basic structural unit
- A2.2.2—Microscopy skills
- A2.2.3—Developments in microscopy
- A2.2.4—Structures common to all cells
- A2.2.5—Prokaryote cell structure
- A2.2.6—Eukaryote cell structure
- A2.2.7—Processes of life in unicellular organisms
- A2.2.8—Differences in eukaryotic cells
- A2.2.9—Atypical cell structure
- A2.2.10—Cell identification in micrographs
- A2.2.11—Drawing and annotation
- A2.2.12 (HL)—Endosymbiosis origin of eukaryotes
- A2.2.13 (HL)—Cell differentiation
- A2.2.14 (HL)—Evolution of multicellularity
Question 1
[Maximum number: 1]
Which feature of striated muscle cells allows them to be considered as a possible exception to the cell theory?
A
They are found in multicellular organisms.
B
They contain more than one nucleus.
C
They are specialized for movement.
D
They do not carry out mitosis.
Question 1
[Maximum number: 1]
What cell component is found in eukaryotic cells but not in prokaryotic cells?
A
Mitochondria for respiration
B
DNA containing genetic information
C
Ribosomes for protein synthesis
D
Cell wall to maintain shape
Question 1
[Maximum number: 1]
The magnification of the micrograph is .
What is the maximum diameter of the nucleus in the cell labelled X ?
A
B
10 nm
C
D
20 nm
Question 1
[Maximum number: 1]
Chlorella and Paramecium are both unicellular eukaryotic organisms living in freshwater. Chlorella is photosynthetic and has a cell wall. Which organelle will be found in Paramecium but not in Chlorella?
A
Chloroplast
B
Contractile vacuole
C
Rough endoplasmic reticulum
D
Mitochondrion
Question 1
[Maximum number: 1]
In mammals, mature red blood cells are specialized in that they lack nuclei, mitochondria or ribosomes. Which statement applies to red blood cells?
A
No chemical reactions take place within their cytoplasm.
B
They cannot produce new enzymes.
C
Materials cannot enter red blood cells.
D
Materials cannot exit red blood cells.
Question 1
[Maximum number: 1]
The images of the radiolarian, a single-celled marine organism, were produced using a light microscope (left) and a scanning electron microscope (right).
What is a reason for the difference in quality of these images?
A
Light cannot pass through the specimen.
B
Higher magnification can be achieved with the electron microscope.
C
The resolution of the electron microscope is higher.
D
Samples are stained with methylene blue when viewed with the light microscope.
Question 1
[Maximum number: 3]
The micrograph is an image of human cheek cells viewed with a light microscope.
Question 1(a)
(a)
Identify the piece of equipment that is used together with the microscope to measure the size of the cells.
[ 1 ]
Question 1(b)
(b)
Each small division of the scale in the micrograph is equivalent to .
[ 2 ]
Question 1(b)(i)
(i)
Calculate the diameter of the cell labelled X .
[ 1 ]
Question 1(b)(ii)
(ii)
Calculate the magnification of the image.
[ 1 ]
Question 1
[Maximum number: 1]
The micrograph shows two types of blood cell.
What determines the differences between the two types of cell?
A
Different number of mitotic cycles
B
Different expression of some genes
C
Reaction to oxygen of red blood cells
D
Reaction to antigens of white blood cells
Question 1
Question 1(a)
(a)
The photomicrograph shows a section of onion (Allium cepa) root tip cells.
× 1000
[ 1 ]
Question 1(a)(ii)
(i)
Calculate the actual length of the cell labelled A , giving the units.
[ 1 ]