1
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
What is true about Bt toxin ?
A
The activated toxin enters the ovaries of the pest to sterillise it and thus prevent its multiplication.
B
Bt protein exists as active toxin in the Bacillus
C
The concerned Bacillus has antitoxins
D
The inactive protoxin gets converted into active form in the insect gut
2
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is -
A
Maturing
B
Widening
C
Elongating
D
Differentiating
3
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
Cytoskeleton is made up of :
A
Cellulose microfibrils
B
Proteinaceous filaments
C
Calcium carbonate granules
D
Callose deposits
4
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
Middle lamella is composed mainly of :
A
Calcium pectate
B
Phosphoglycerides
C
Muramic acid
D
Hemicellulose