1
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
What causes a green plant exposed to the light, on only one side, to bend towards the source of light as it grows?
A
Light stimulates plant cells on the lighted side to grow faster.
B
Auxin accumulates on the shaded side, stimulating greater cell elongation there.
C
Green plants need light to perform photosynthesis.
D
Green plants seek light because they are photoreopic.
2
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Typical growth curve in plants is
A
stair-steps shaped
B
parabolic
C
sigmoid
D
linear.
3
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
Dr. F. went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly-cut coleoptile stumps. Of what significance is this experiment?
A
It made possible the isolation and exact identification of auxin.
B
It is the basis for quantitative determination of small amounts of growth-promoting substances.
C
It supports the hypothesis that 1AA is auxin.
D
It demonstrated polar movement of auxins.
4
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
A few normal seedlings of tomato were kept in a dark room. After a few days they were found to have become white -coloured like albinos. Which of the following terms will you use to describe them?
A
Mutated
B
Embolised
C
Etiolated
D
Defoliated
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