11) Photosynthesis is driven by the ________ light spectrum. A) visible B) infrared C) ultraviolet D) microwave 12) Which of the following statements is true? A) The shortest wavelength of light is the ultraviolet ray, which is the highest in energy. B) The longest wavelength of light is the ultraviolet ray, which is the highest in energy. C) The shortest wavelength of light is the visible light, which is the highest in energy. D) The shortest wavelength of light is the infrared ray, which is the highest in energy. E) The longest wavelength of light is the infrared ray, which is the highest in energy. 13) ________ permit CO2 to enter the leaf and O2 to escape. A) Mesophyll cells B) Thylakoids C) Stomata D) Chloroplasts 14) The stomata are located in the leaf’s ________, and the chloroplasts are located in the leaf’s ________. A) epidermis; epidermis B) mesophyll; epidermis C) epidermis; mesophyll D) epidermis; stomata E) mesophyll; mesophyll 15) Chlorophyll is found in which part of the plant cell? A) stroma B) cytoplasm C) thylakoid D) plasma membrane 16) The site of photosynthesis in a cell is the: A) mitochondrion. B) central vacuole. C) stomata. D) chloroplast. 17) What function does sunlight perform in photosynthesis? A) Sunlight excites electrons in chlorophyll to a higher energy level. B) Sunlight fixes the CO2 into glucose. C) Sunlight converts electrons in chlorophyll to a lower energy state. D) Sunlight converts electrons in water to a lower energy state. E) Sunlight excites electrons in water to a higher energy level. 18) The purpose of chlorophyll is to: A) absorb light. B) let CO2 enter the plant. C) make ATP. D) make NADPH. 19) Chlorophyll a and the accessory pigments of a photosystem act as an antenna by: A) being the primary electron acceptor. B) absorbing energy from sunlight and passing it on. C) absorbing CO2 and passing it on. D) absorbing energy from NADPH and passing it on. 20) The transfer of electrons from chlorophyll a molecules to the primary electron acceptor is an example of a/an: A) redox reaction. B) synthesis reaction. C) light reaction. D) absorption reaction.