In leguminous plants leghemoglobin protects _____ activity.
A: Nitrogenase
B: Protiase
C: Nitrate reductase
D: Both A and B
A: Nitrogenase
B: Protiase
C: Nitrate reductase
D: Both A and B
举一反三
- About ____ genes are essential to nitrogenase activity in bacteria, many of them needed for the synthesis, assembly, and insertion of the cofactors. A: 10 B: 15 C: 20 D: 30
- Both the host and guests should always be punctual for a social activity.
- All of the following are functions of TH1 cells EXCEPT: A: contributes to autoimmunity B: enhances APC activity C: enhances TC activity D: involved with delayed type hypersensitivity reactions E: protects against intracellular pathogens
- Which of the following statements about markets is most accurate? A: Markets are usually a good way to organize economic activity B: Markets are usually inferior to central planning as a way to organize economic activity. C: Markets fail and are therefore not an acceptable way to organize economic activity. D: Markets are a good way to organize economic activity in developed nations, but not in less developed nations.
- The ______ of plants and animals have largely influenced the history of both man and human species.