Q1. Select the bacterial species useful as single cell protein (SCP).
A Spirulina
B Methylophilus methylotrophus Correct
C Trichoderma polysporum
D Monascus purpureus
Explanation
Methylophilus methylotrophus is a bacterial species known for producing single cell protein from methanol-based substrates, so it fits the wording of the question. Spirulina is widely used as single cell protein, but it is a cyanobacterial/algal form and the question asks specifically for a bacterial species in this printed set. Trichoderma polysporum is a fungus associated with cyclosporin production, not the standard bacterial SCP example. Monascus purpureus is also a fungus, known for red pigments and fermented products, not as the bacterial SCP species asked here.