A. glucose
B. glycerol
C. amino acids
D. fatty acids
2. 6. Where do green plants obtain the following elements for photosynthesis?
Carbon / Hydrogen
A. Air / Soil
B. Soil / Air
C. Water / Humus
D. Humus / Water
3. The following diagram shows the apparatus assembled by a group of students to investigate the effect of light intensity on the rate of photosynthesis.
Which of the following should be done to improve the procedure and eliminate a possible limiting factor ?
A. Insert a transparent heat shield between the lamp and the plant.
B. Immerse the green plant in pond water rich in carbon dioxide.
C. Use dilute sodium hydrogen carbonate solution in the large tank.
D. Remove the lead weight to allow the plant to float at the surface of the water.
Questions 4 & 5 refer to the following diagram of a family tree where the allele for wavy hair (W) is dominant to the allele for straight hair (w).
4. If person R is homozygous for the wavy hair alleles, which statement is true about persons R and S ?
A. They have the same phenotype and the same genotype.
B. They differ in phenotype but have the same genotype.
C. They differ in both phenotype and genotype.
D. They have the same phenotype but differ in genotype.
5. The chance of persons S and T producing a straight-haired child is
A. 1 in 1.
B. 1 in 2.
C. 1 in 3.
D. 1 in 4.
6. The diagram shows the carbon cycle.What are processes P, Q and R?
P / Q / R
A. photosynthesis / respiration / photosynthesis
B. photosynthesis / photosynthesis / respiration
C. respiration / photosynthesis / respiration
D. respiration / respiration / photosynthesis
7. The diagram shows the front part of an eye.
Which changes take place in the eye when a person looks up from reading a book to view a distant airplane?
Ciliary muscle / Lens
A. contracts / becomes thicker
B. contracts / becomes thinner
C. relaxes / becomes thicker
D. relaxes / becomes thinner
Answers
1. C
2. A
3. B
4. D
5. B
6. C
7. D
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