SCIENCE TEST

17. Based on Table 1 and Figure 1, which color of light is associated with the wavelength of light that
results in the greatest absorption by chlorophyll b ?
A. Blue
B. Green
C. Yellow
D. Red
Answer: A.
Figure 1 shows that the greatest absorption by chlorophyll b occurs at a wavelength
between 475 nm and 500 nm. Table 1 shows that this falls in the wavelength range for
Blue (430 nm to 500 nm).
18. In eukaryotic organisms, the chemical reactions associated with the chemical equation shown in the
passage typically occur within which of the following structures?
F. Chloroplasts
G. Mitochondria
H. Lysosomes
J. Nuclei
Answer: F.
Since photosynthesis involves, chlorophyll, a logical guess is Chloroplasts.
19. In Figure 2, at which of the following wavelengths does the rate of photosynthesis exceed the rate of
photosynthesis at 670 nm?
A. 400 nm
B. 430 nm
C. 630 nm
D. 700 nm
Answer: B.
In Figure 2, the vertical axis shows the rate of photosynthesis as a percentage of the rate
the rate at 670 nm. The rate is exceeded at values greater than 100%. Of the possible
answers, only 430 nm has a rate of more than 100% of the rate for 670 nm.
20. In the chemical equation shown in the passage, the carbon in CO2 becomes part of which of the
following types of molecules?
F. Fat
G. Sugar
H. Protein
J. Nucleic acid
Answer: G.
For this question, it helps to know that plants produce glucose during photosynthesis.
Glucose is a sugar. You don’t need to know the chemical formula for glucose. Look at
the equation shown in the passage:
6 CO 2 + 12 H 2O + energy → C 6H 12O 6 + 6 O 2 + 6 H 2O