Question

Scientists recently discovered a species of bacteria that’s capable of photosynthesis, but it’s anaerobic and doesn’t produce or use oxygen for respiration. Which process will be absent in this organism?

A. Calvin cycle
B. electron transport system
C. glycolysis
D. Krebs cycle

Answer 1

Anaerobic bacteria: Bacteria which does not use oxygen or in the absence of oxygen.

electron transport system is absent in photosynthetic anaerobic bacteria.

since, glycolysis, krebs cycle are essential metabolic pathways in order to produce energy and calvin cycle is essential for the photosynthesis process.

Answer 2

The answer is D. Krebs cycle.

the Krebs cycle only occurs when oxygen is present, and so it would seem to be the same for the electron transport system...although, in anaerobic bacteria, it is still used as a respiratory electron transport chain called physolmere.

for those who find answers to these old questions, and see incorrect one's commented on brainly... please correct them. It isn't hard, and it'll help someone else 'study'.