Plant Physiology: Hormones, Photosynthesis, and Transport
Comprehensive quiz covering plant physiology topics including photosynthesis, plant hormones (auxin, gibberellin, ethylene), translocation, mineral nutrition, stomatal movements, and plant growth responses.
Questions
What is imbibition?
- Displacement of one fluid by another immiscible fluid
- Displacement of one fluid by another miscible fluid
- Displacement of immiscible fluid by another miscible fluid
- Displacement of one fluid by another fluid
- Displacement of a miscible fluid by another miscible fluid
Metabolism will be adversely affected when the leaves are coated with wax on their upper surfaces in which of the following plants?
- Lotus
- Hydrilla
- Pistia
- Vallisneria
- Water hyacinth
Which of the following is/are required for auxin synthesis?
- Calcium
- Zinc
- Sugars
- Protein
- Chlorine
The ripening of fruits can be accelerated by which of the following methods?
- Reducing water supply to the plant during fruit development
- Artificial exposure of developing fruits to ethylene
- Supplying abundant nitrogen to the atmosphere surrounding them
- Warming up the surroundings artificially
- Cooling up the surroundings artificially
Which chemical is present in the cell-sap of the members of compositae family?
- Carbohydrate
- Protein
- Insulin
- Calcium oxalate
- Vitamin
In phosphorus deficiency, the first leaves which become yellow are
- mature leaves at the base
- youngest leaves at the apex
- both mature and young leaves
- mature leaves at the apex
- young leaves at the base
Which of the following is never a limiting factor for photosynthesis?
- Oxygen
- Carbon dioxide
- Light
- Chlorophyll
- Water vapour
The Starch cannot move from cell to cell: how does it accumulate in the potato tubers?
- Starch is mobilised from leaves to tubers through phloem.
- Sugar is synthesised in potato tubers.
- It is translocated in the form of sugar.
- Some starch from soil might enter the tubers.
- None of these
Which of the following is a device for growing plants in a controlled environment?
- Cyclotron
- Phytotron
- Crescograph
- Potometer
- None of these
One of the following gases was absent in the past and came into the atmosphere with the coming of the green plants on earth. Which was that element?
- Ammonia
- Nitrogen
- Carbon dioxide
- Oxygen
- Carbon monoxide
Opening and closing of stomata in angiosperms is due to which of the following phenomenon?
- Photosynthesis in guard cells
- Oxygen accumulation in stoma
- Effect of auxins
- Changes in turgor pressure of guard cells
- Effect of root pressure
In which of the following processes is light energy converted to chemical energy?
- Digestive action
- Respiration
- Fermentation
- Photosynthesis
- Enzymatic action
When simple sugar is formed in the leaves it is _________.
- stored there
- changed into starch
- utilized
- changed into mineral salts
- transported
Organic substances such as sugars translocated in the phloem, can be demonstrated by __________.
- grafting
- root pressure
- defoliation
- cutting of the shoot
- ringing the stem
Which of the following is a growth inhibitor?
- Auxin
- Gibberellin
- Ethylene
- Cytokinin
- Methylene
What do you mean by girdling of plant?
- Complete removal of a strip of bark
- Incomplete removal of a strip of bark
- Complete removal of xylem
- Complete removal of phloem
- Complete removal of cork cambium
Gibberellins do not _________.
- substitute cold treatment
- promote blotting in rosette plant
- inhibit flowering in long day plants
- cause elongation of dwarf plants
- None of these
Which is the circadian rhythmic nastic movement of higher plants in response to the onset of darkness?
- Autonomic movement
- Seismonasty
- Nyctinasty
- Paratonic movement
- None of these