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Biology

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11. Compared to long-wavelength photons, short-wavelength photons have
a. an insignificant amount of energy.
b. more energy.
c. energy not available to plant cells.
d. a ladder of energy.
e. an equal amount of energy.

12. The wavelength of X rays is shorter than the wave length of infrared rays. Which of the following is true?
a. X rays have more energy per photon than infrared rays have.
b. X rays have a smaller value for Planck's constant than infrared waves have.
c. X rays have a different absorption spectrum than infrared waves have.
d. X rays and infrared waves have the same frequency.
e. Infrared waves are in the ground state, whereas X rays are in the excited state.

13. A graph that plots the rate at which CO2 is converted to glucose versus the wavelength of light illuminating a leaf is called
a. a Planck equation.
b. an absorption spectrum.
c. enzyme kinetics.
d. an electromagnetic spectrum.
e. an action spectrum.

14. How do red and blue light differ from one another?
a. They differ in intensity.
b. They have a different number of photons in each quantum.
c. Their wavelengths are different.
d. They differ in duration.
e. Red is radiant, whereas blue is electromagnetic.

15. A molecule that has an absorption spectrum showing maximum absorption within the wavelengths of visible light is
a. a reducing agent.
b. a quantum.
c. a photon.
d. electromagnetic radiation.
e. a pigment.

16. When white light strikes a blue pigment, blue light is
a. reduced.
b. absorbed.
c. converted to chemical energy.
d. scattered or transmitted.
e. used to synthesize ATP.

17. Plants are green because
a. chlorophylls absorb blue and orange-red wavelengths of light and reflect green light.
b. chloroplasts transmit green light.
c. energized chlorophyll a emits green light.
d. plants do not possess green pigment.
e. chlorophylls absorb green light.

18. The energy difference between an electron excited by a photon and the electron in its ground state is _______ of the photon.
a. less than the energy
b. greater than the energy
c. equal to the energy
d. related to the wavelength
e. Both c and d

19. When a photon is absorbed by a molecule, the photon
a. loses its ability to generate any energy.
b. raises the molecule from a ground state of low energy to an excited state.
c. affects the molecule in ways that are not clearly understood.
d. causes a change in the velocity of the wavelengths.
e. None of the above

20. A range of energy that cannot be seen by human eyes but has slightly more energy per photon than visible light is known as _______ radiation.
a. adaptive
b. solar
c. gamma
d. ultraviolet
e. None of the above