#Question id: 4135
#Unit 3. Fundamental Processes
In the “activation” of an amino acid for protein synthesis:
#Question id: 10891
#Unit 10. Ecological Principles
In a lake ecosystem with three trophic levels - Phytoplankton (P), Zooplankton (Z) and Carnivore (C) is control by bottom-up effects, which of the following observation is incorrect?
#Question id: 10134
#Unit 6. System Physiology – Plant
Some herbicides such as dichlorophenyldimethylurea (DCMU, also known as diuron) and paraquat, block photosynthetic electron flow from where ?
a.) DCMU blocks electron flow at the quinone acceptors of PSII, by competing for the binding site of plastoquinone that is normally occupied by PQB
b.) Paraquat accepts electrons from the early acceptors of PSI and then reacts with oxygen to form superoxide, O2 – , a species that is very damaging to chloroplast components
c.) DCMU blocks electron flow at the pheophytin acceptors of PSII, by competing for the binding site of pheophytin
d.) Paraquat accepts electrons from the Iron-sulfur system of PSI and then reacts with oxygen to form superoxide, O2 – , a species that is very damaging to chloroplast components
Which of the following combination is true?
#Question id: 19085
#Unit 6. System Physiology – Plant
#Question id: 19829
#Unit 12. Applied Biology
At the site of infection in plants accumulation of which compounds leads to host cell death