9700_s22_qp_11
A paper of Biology, 9700
Questions:
40
Year:
2022
Paper:
1
Variant:
1
Login to start this paper & get access to powerful tools
1
A student used a stage micrometer scale to calibrate an eyepiece graticule. The diagram shows the view of both the stage micrometer scale and the eyepiece graticule seen by the student. The divisions on the stage micrometer scale are 0.1 mm apart. 0 10 20 30 40 50 60 70 80 90 10 stage micrometer scale eyepiece graticule The student removed the stage micrometer scale and viewed a slide with blood cells on it. The same lenses were used so that the magnification remained unchanged. The student measured the diameter of one of the white blood cells on the slide using the eyepiece graticule and recorded that it was 8 eyepiece units. What is the correct diameter of this white blood cell in micrometers?
1. Cell structure  →  1.1. The microscope in cell studies
8. Transport in mammals  →  8.1. The circulatory system
Open
2
Four students were asked to match the function with the appearance of some cell structures in an animal cell. The functions were listed by number. mRNA passes through to the ribosome produces the mitotic spindle during cell division packaging of hydrolytic enzymes that will remain in the cell The appearances were listed by letter. V membranes which surround an enclosed inner cavity W non-membrane-bound, spherical structures X a double membrane interspersed with pores Y non-membrane-bound, cylindrical structures Z membrane-bound sacs, arranged as a flattened stack Which student correctly matched the numbered function with the appearance of the cell structure?
1. Cell structure  →  1.2. Cells as the basic units of living organisms
12. Energy and respiration  →  12.2. Respiration
Open
17
The indicator cresol red, changes from red to yellow when put into acid. Four blocks of agar containing cresol red were cut to different sizes measured in millimetres. The blocks were submerged in acid. All other variables were kept constant. The time taken for each of the blocks to completely turn yellow was recorded. Which of the four blocks became completely yellow most quickly?
13. Photosynthesis  →  13.2. Investigation of limiting factors
2. Biological molecules  →  2.1. Testing for biological molecules
Open
21
The photomicrograph shows cells at different stages of mitosis. P Q R S T A student wrote four statements about the photomicrograph. Cell P shows anaphase. Spindle formation is occurring in cell Q. The amount of DNA in cell R is the same as in cell T. The correct order for the stages is S  R  T  P  Q. Which statements are correct?
5. The mitotic cell cycle  →  5.2. Chromosome behaviour in mitosis
16. Inheritance  →  16.1. Passage of information from parents to offspring
Open
27
The table contains some information about uptake and movement of water and of mineral ions in plants. water mineral ions mechanism for uptake osmosis diffusion, active transport site of uptake root hair cells root hair cells mechanism of release evaporation, diffusion diffusion, active transport site of release stomata plant cells Using the information provided, which factors will affect the uptake and movement of water or of mineral ions in plants?
7. Transport in plants  →  7.2. Transport mechanisms
4. Cell membranes and transport  →  4.2. Movement into and out of cells
Open
29
A student wrote the following statements about a possible mechanism for loading sucrose from a source. When energy is released from ATP, the released energy is used to move sucrose through a co-transporter protein in the companion cell membrane. As sucrose is moved into a companion cell the pH in the cell wall of the companion cell decreases. Proton pumps in the cell membrane of a companion cell move sucrose into the phloem sieve tube element. Which statements are correct?
7. Transport in plants  →  7.2. Transport mechanisms
13. Photosynthesis  →  13.1. Photosynthesis as an energy transfer process
Open
32
The diagram shows pressure changes in the left side of the heart and aorta over time. The length of this cardiac cycle is 0.6 s. Points 1, 2, 3 and 4 indicate when atrioventricular valves and semilunar valves either open or close. 0.6 0.5 0.4 0.3 0.2 0.1 time / s pressure / kPa key left ventricle aorta left atrium What is the total time during one cardiac cycle that the atrioventricular valves and the semilunar valves are both closed at the same time?
8. Transport in mammals  →  8.3. The heart
Open
38
T-lymphocytes have a protein, PD-1, on their surface. Some cancer cells have a receptor molecule on their surface which binds with PD-1, inactivating the T-lymphocyte. A monoclonal antibody, lambrolizumab, has been produced against this receptor. Trials showed that in 54 of 135 people with advanced skin cancer who were given lambrolizumab the tumours more than halved in volume. In six of the 57 people who were given the highest dose the tumours disappeared. What may be correctly concluded from this information?
Open
39
A person’s blood group is determined by antigens present on the red blood cells. The table shows the antigens and antibodies in the blood of people with different blood groups. blood group presence of A or B antigens on red blood cells presence of antibodies to A or B in plasma A A only anti-B only B B only anti-A only AB A and B neither O neither anti-A and anti-B During a blood transfusion, it is essential that the person receiving the blood does not have antibodies to the donor’s blood. Which blood groups can be given to a person with blood group AB?
11. Immunity  →  11.2. Antibodies and vaccination
8. Transport in mammals  →  8.1. The circulatory system
Open