2019年5月IB生物SL真题下载-Paper1
1. Which graph represents the change in cell surface area to volume ratio with increasing cell diameter?
2. The image shows an electron micrograph of part of a cell.
Which features do the two structures labelled X and Y have in common?
A. They are surrounded by a double membrane.
B. They contain 70S ribosomes.
C. They contain naked DNA.
D. They are only found in leaf cells.
3. The images show a sequence of changes in an organism.
What is the change and which process is necessary for it to occur?
4. Which process(es) occur(s) by osmosis?
- I. Uptake of water by cells in the wall of the intestine
- II. Loss of water from a plant cell in a hypertonic environment
- III. Evaporation of water from sweat on the skin surface
A. I only
B. I and II only
C. II and III only
D. I, II and III
5. The table shows the number of cells in various stages of the cell cycle in four samples of ovarian tissue from different patients. Which tissue sample A, B, C or D has the highest mitotic index?
6. What type of molecule is formed by the chemical reaction shown in the diagram?
A. Dipeptide
B. Disaccharide
C. Diglyceride
D. Cellulose
7. Which substance must be transported in the blood by lipoprotein complexes?
A. Cholesterol
B. Oxygen
C. Sodium chloride
D. Amino acids
8. What is found in insulin molecules?
A. Phosphates
B. Nucleotides
C. Peptide bonds
D. Glycerol
9. The graph shows the results of an investigation into the activity of turnip peroxidase.The accumulation of the product of the reaction catalysed by the enzyme is shown at different pH values.
Based on the data in the graph, what is most probably the optimum pH for turnip peroxidase?
A. Between 3 and 5
B. Between 10 and 11
C. Between 7 and 8
D. Between 9 and 10
10. The gene that codes for a particular polypeptide includes the base sequence shown.
GAGTACCCT
What is the base sequence of the mRNA molecule which is complementary to this sequence?
A. GAGTACCCT
B. CTCATGGGA
C. GUGTUCCCT
D. CUCAUGGGA
2019年5月IB生物SL真题余下省略！
你可能还关注