#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: 3256
#Section 3: Genetics, Cellular and Molecular Biology
There are three alleles, A1, A2, and A3, whose frequencies are equal abundance. According the Hardy-Weinberg equilibrium
#Question id: 140
#Section 2: General Biology
A polypeptide chain may have abrupt changes in direction and restriction in geometry because of the presence of
#Question id: 3586
#Section 3: Genetics, Cellular and Molecular Biology
In watermelons, bitter fruit (B) is dominant over sweet fruit (b), and yellow spots (S) are dominant over no spots (s). The genes for these two characteristics assort independently. A homozygous plant that has bitter fruit and yellow spots is crossed with a homozygous plant that has sweet fruit and no spots. If an F1 plant is backcrossed with the bitter, yellow spotted parent, what phenotypes and proportions are expected in the offspring?
#Question id: 27218
#Section 7: Recombinant DNA technology and Other Tools in Biotechnology
As the E value of a BLAST search becomes smaller