Multiple Choice QuestionsIf a nail is hammered in the bark of tree at height 4 m, after ten years the height of tree is doubled. Then the height of nail will be:
4 m
8 m
16 m
10 m
The transition to flowering in plants requires
Growth of plants under long – day conditions
Growth of plants under short‐day conditions
Reprogramming of the shoot apical meristem
Synthesis of the flowering hormone florigen
Both halophytes and glycophytes compartmentalize cytotoxic ions into the intracellular compartment or actively pump them out of the cell to the apoplasts with the help of membrane transport proteins. Among these, the Na+‐H+ antiporter, NHX1, is localized in
The plasma membrane
Chloroplast (inner envelope)
Mitochondria (outer membrane)
Tonoplast
The photoreceptor commonly involved in light entrainment of the biological clock in flies, moulds and plants is
Phytochrome
Rhodopsin
Carotenoid
Cryptochrome
S-adenosyl methionine is a precursor of which plant hormone?
Abscisic acid
Auxin
Ethylene
Cytokinin
The one of the most widely used herbicides methyl viologens interfere photosynthesis of higher plants. They are responsible for
Evolution of more oxygen
Dissipation of proto gradient across thylakoid membrane
Inhibition of flow of electron from PS II to PS I
Transfer of electrobs from PS I to molecular oxygen
Which would be the result of mutation in genes responsible for radial patterning in roots of higher plants?
No apical root formation
Root hair will fail to develop
Variation in number and position of cell in vascular system
Roots will be positively geotrophic
Among the following which gene product migrates from leaves to shoot meristem during transition of shoot meristem into floral meristem?
Flowering locus T
Flowering locus D
Leafy
Apetala 1
Which group of algae is believed to be most closely related to higher plants?
Charophyceae
Chlorophyceae
Rhodophyceae
Pheophyceae
