MCQs-8 (PGRs)
(1) ............... acts as an antagonist to GAs.
a. Gibberelline
b. Cytokinine
c. Auxin
d. ABA
(2) ..................... promote
femaleness in dioecious flowers.
a. Auxin
b. Gibberelline
c. Cytokinine
d. Ethylene
(3) .............. mediates the tropistic
response of bending in response to gravity and light.
a. Cytokinine
b. Auxin
c. Gibberelline
d. Ethylene
(4) Which PGR induce maleness in dioecious
flowers?
a. Cytokinine
b. Gibberelline
c. Auxin
d. Ethylene
(5) Seedless and large size grapes are
produced on commercial scale by ............... treatment.
a. Cytokinine
b. Auxin
c. Gibberelline
d. Ethylene
(6) .................... is generally found
higher in meristematic regions and growing tissue.
a. Cytokinine
b. Auxin
c. Gibberelline
d. ABA
(7) Which PGR enhance stomatal opening in
some species?
a. Gibberelline
b. Auxin
c. Cytokinine
d. ABA
(8) ................... induce seed to
synthesize storage proteins.
a. Gibberelline
b. Auxin
c. Cytokinine
d. ABA
(9) Which PGR induces gene transcription
for proteinase inhibitors in response to wounding?
a. ABA
b. Auxin
c. Cytokinine
d. Gibberelline
(10) ............. is considered as
responsible for positive geotropic bending of roots.
a. Cytokinine
b. Auxin
c. Gibberelline
d. Ethylene
