A dioecious plant has XX sexual genotype for female and XY for male. After double fertilization, what would be the genotype of the embryos and endosperms?
A. 100% ovules will have XXX endosperm and XX embryo
B. 100% ovules will have XXY endosperm and XY embryo
C. 50% ovules will have XYY endosperm and XY embryo, while other 50% will have XXY endosperm and YY embryo
D. 50% ovules will have XXX endosperm and XX embryo, while the other 50% will have XXY endosperm and XY embryo
Answer: Option D
RNA is very much susceptible to hydrolysis in alkali because
A. It contains uracil residues in its structure
B. its 2'-OH group participate in intramolecular cleavage of phosphodiester backbone
C. Cleavage occurs in the glycosylic bonds of purine bases
D. Cleavage occurs in the glycosylic bonds of pyrimidine bases
A. Binding of the rho protein upstream of the termination element
B. No protein factors and only RNA secondary structure and run of 'U's
C. Presence of UGA or UAA stop codons
D. Binding of accessory factors at termination signal
A. Both (A) and (R) are true and (R) is the correct reason for (A)
B. Both (A) and (R) are true and (R) is not the correct reason for (A)
C. (A) is false but (R) is true
D. (A) is true but (R) is false
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