#Question id: 10134
#Section 2: General Biology
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: 10135
#Section 2: General Biology
Which of the following are strongest reductant?
#Question id: 10136
#Section 2: General Biology
A protein complex contain a Rieske protein known as
#Question id: 10137
#Section 2: General Biology
The Calvin–Benson cycle pathway decreases the oxidation state of carbon from the highest value, found in CO2 (+4), to levels found in sugars; +2 in keto groups — CO—; 0 in secondary alcohols —CHOH, In view of its notable capacity for lowering the carbon oxidation state, the Calvin–Benson cycle is also aptly named the
#Question id: 10140
#Section 2: General Biology
#Question id: 10142
#Section 2: General Biology
Which of the following statements is INCORRECT?