# GATE2016-26

Which combination of the following statements is CORRECT for cyanobacteria?

1. They can perform oxygenic photosynthesis
2. Usually filamentous forms are involved in nitrogen fixation
3. Nitrogen fixation occurs in heterocysts
4. They cannot grow in a mineral medium exposed to light and air
1. P, Q and R
2. P, S and R
3. Q, R and S
4. P, Q and S
in Others
edited

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