The oxygen released in photosynthesis comes from

A. carbon dioxide
B. glucose
C. ribulose biphosphate
D. water
E. atmospheric oxygen


D. water

Biology & Microbiology

You might also like to view...

The cell walls of fungi are composed of:

A. chitin B. cellulose C. dentine D. peptides E. glycerol

Biology & Microbiology

Ricin is

a. a substance found in castor bean seeds. b. a polysaccharide extracted from rice. c. an ingredient in many paints and cosmetics. d. a protein that inactivates ribosomes. e. a substance found in castor bean seeds and a protein that inactivates ribosomes.

Biology & Microbiology

Which equation represents photosynthesis?

A) 6CO2 + 6O2 + sunlight ? C6H12O6 + 6H2O B) 6H2O + 6CO2 + sunlight ? C6H12O6 + 6O2 C) C6H12O6 + 6O2 + sunlight ? 6CO2 + 6H2O D) O2 + H2O + sunlight ? C6H12O6 + CO2

Biology & Microbiology

A 67-year-old diabetic man develops intense pain and swelling on his calf, which acquires a bronze discoloration and develops significant tissue necrosis with hemorrhagic bullae and gas production (gas gangarene). Which of the following is the important contributing agent?

A. Clostridium perfringens B. Clostridium difficile C. Clostridium botulinum D. Clostridium tetani

Biology & Microbiology