The organelle of C3 plants, where glyoxylate is formed is
Chloroplast
Peroxisome
Mitochondria
Cytosol
Chromophore associated with phytochrome of plants is
Phycobilin
Beta-carotene
Pterin
Flavin adenine dinucleotide
Which of the following is produced in phenyl propanoid pathway?
Phenolics
Carotenes
Alkaloids
Terpenes
Which of the following helps in osmoprotection in plants?
Proline
Tryptophan
Glycine
Levulinic acid
The dwarf pea mutant (le) used by Mendel was defective in which of the following enzyme involved in gibberellin biosynthesis?
Ent‐Kaurene synthase
GA3 β-hydroxylase
GA 20 oxidase
Ent‐Kaurenoic acid hydroxylase
Which of the following statements with respect to alternate oxidase activity in cyanide‐resistant respiration in plants is not correct?
Alternate oxidase accepts electrons directly from cytochrome C
Some plants exhibit thermogenesis during inflorescence development
Transcription of alternate oxidase gene is often induced by various abiotic stresses
When electrons pass to alternate oxidase, two sites of proton pumping are bypassed
In mature Arabidopsis embryo, root apical meristem consists of cells derived from
Embryo and apical suspensor cells
Embryo only
Suspensor only
Hypophysis only
A.
Embryo and apical suspensor cells
In mature Arabidopsis embryo, root apical meristem consists of cells derived from a embryo and apical suspensor cells.
Na+‐K+ ATPase is a tetramer of 2α and 2β subunits. On which of the following subunits are the Na+ and K+ binding sites present
Both on α
Both on β
Na+ on α and K+ on β
Na+ on β and K+ on α
cAMP signaling play a very important role in the development and differentiation of Dictyostelium discoideum. This morphogen is synthesized by different adenylyl cyclase expressed at different stages of its life cycle. The following statements (AD) refer to the effect of mutations in different adenyl cyclase genes
A. aca deficient cells can be allowed aggregate by expressing them to pulse of cAMP.
B. acb deficient cells would form normal fruiting bodies and the spores can germinate when exposed to favourable conditions.
C. acg deficient cells develop normally and the spores germinate in the spore head itself.
D. Spores formed from the acg deficient cells will germinate irrespective of the osmotic conditions.
Which of the above statements are correct?
A and D
A only
A and B
C and D
Fill in the blanks (a, b, c and d) in the following statements with a proper
combination of m, n, o, p.
Where in m represents longer; n represents shorter; o represents prevents; p represents inducers.
Shot day (SD) plants flower when night lengths are ___________ a ________ than a critical dark period. Interruption of the dark period by a brief light treatment ______ b ___________ flowering in SD plants. Long day (LD) plants flower when night length is _________ c ___________ than a critical period. Shortening of the night with a brief light treatment _______d____________ flowering in LD plants
m, o, n, p
n, p, m, o
n, o,m, p
m, p, n, o