#Question id: 23255
#SCPH06 I Botany
#Question id: 10524
#I Life Science/ Life Sciences Group – I-V
Members of the Poaceae family, which includes all of the cereal crops, use benzoxazinoids, these alkaloids shows;
a) Alkaloids are derived from the tryptophan as constitutively produced defensive secondary metabolites
b) These benzoxazinoids such as DIBOA and its derivative DIMBOA are usually stored in the peroxisome
c) Upon damage, the inactive glycosides are hydrolyzed, generating glucosinolate, which are toxic not only to insect herbivores but also against pathogens
d) DIBOA and DIMBOA perform insecticidal and pesticidal activities
e) It can be inactivated by hydroxylation and N-glycosylation reactions
Which of the following combination is correct about benzoxazinoids alkaloids?
#Question id: 3266
#SCPH06 I Botany
One species mates at the season when daylight is increasing from 13 hours to 13 hours, 15 minutes; another species mates at the season when daylight is increasing from 14 hours to 14 hours, 15 minutes. The isolating mechanism is
#Question id: 10236
#SCPH28 | Zoology
Following figure represent fundamental and realized nich of species P and Q in gradient of temperature along sea shore. which of the following statement are correct?
A) Fundamental niche of species P is greater than its
realized nich
#Question id: 10160
#I Life Science/ Life Sciences Group – I-V
Which of the following statements about the C4 cycle is true ?
a.) C4 plants uses the enzyme phosphoenolpyruvate carboxylase (PEPCase), rather than rubisco
b.) Unlike rubisco, O2 does not compete with HCO3 − in the carboxylation catalyzed by PEPCase
c.) initial carboxylation catalyzes in bundle sheath cells, four-carbon acids formed and flow across the diffusion barrier to the mesophyll cells
d.) during decarboxylation, releasing CO2 that is refixed by rubisco via the Calvin–Benson cycle