1
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
A column of water within xylem vessels of tall trees does not break under its weight because of
A
lignification of xylem vessels
B
positive root pressure
C
dissolved sugars in water
D
tensile strength of water.
2
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The oxygen evolved during photosynthesis, comes from water molecules. Which one of the following pairs of elements is involved in this reaction?
A
Magnesium and Molybdenum
B
Magnesium and Chlorine
C
Manganese and chlorine
D
Manganese and Potassium
3
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by
A
carotene
B
cytochrome
C
leghaemoglobin
D
xanthophyll.
4
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Chromatophores take part in
A
movement
B
respiration
C
photosynthesis
D
growth.
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