Mesophyll consists of :
  • Spongy parenchyma cell
  • Palisade parenchyma cell
  • Both (A) and (B)
  • None of these
Each stoma is guard by
  • Guard cell
  • Palisade cell
  • Mesophyll cell
  • Parenchyma cell
Leaf is made up of:
  • Palisade cells
  • Parenchyma cell
  • Mesophyll cell
  • Guard cell
Xerophytes have
  • Sunken stomata
  • Stomata on one side of the leaf
  • No stomata
  • Stomata on both sides of the leaf
Each guard cell contains:
  • Chloroplasts
  • Leucoplasts
  • Oil and protein granules
  • Starch
Stomata controls:
  • The loss of food material from the plant
  • The loss of water from the plant
  • The loss of energy from the plant
  • The loss of air from the plant
If the intensity of light is increased, the rater of photosynthesis:
  • Increases into certain limit
  • Decreases into certain limit
  • Increase and decreases at regular interval
  • Remain the same
The oxygen in photosynthesis is released from
  • Carbohydrate
  • \(H_2O\)
  • \(CO_2\)
  • Chlorophyll
Photosynthesis proceeds in a sequence of –
  • Dark phase and light phase
  • Light phase and dark phase
  • Light phase alone
  • Dark phase alone
In the light phase of photosynthesis, there is the formation of –
  • \(NADPH_2\)
  • \(ATP\)
  • Carbohydrates
  • Both \(ATP\) and \(NADPH_2\)
A non-green cell will not have the following activity:
  • Requires carbohydrates
  • Evolve \(O_2\)
  • Evolve carbon dioxide
  • Required water
In dark, the guard cells are:
  • More turgid
  • Not turgid
  • Less turgid
  • none of these
Chlorophyll-a present in:
  • Algae
  • Croton
  • Algae and Croton
  • Bacteria
Covering with black strips should be tested for presence of:
  • Water in leaf
  • \(CO_2\) in leaf
  • \(O_2\) in leaf
  • Starch in leaf
Leaves are destarched by keeping the plant in:
  • 2 hours in sun light
  • 10-12 hours in day
  • Only 2 hours in night
  • 101-12 hours in night
The following light witch is more effective in opening of stomata :
  • Green
  • Red
  • Blue
  • red and blue
The process in which water is split during photosynthesis is –
  • Hemolysis
  • Photolysis
  • Plasmolysis
  • Hydrolysis
The teacher instructed a student to place a healthy potted shoe flower plant in a dark room for 24 hour prior to an experiment on photosynthesis. The purpose of placing it in a dark rook is:
  • To destrach the leaves
  • To increase the intake of \(CO_2\)
  • To denature the enzymes in the leaves
  • To activate the chloroplast in the leaves
The energy change in photosynthesis is from –
  • Light energy to molecular energy
  • Light energy to electrical energy
  • Light energy to chemical energy
  • Light energy to activation energy
In bacterial photosynthesis, the hydrogen donor is –
  • \(H_2O\)
  • \(H_2SO_4\)
  • \(NH_3\)
  • \(H_2S\)
The color of light in which rate of photosynthesis is minimum
  • Red light
  • Green light
  • Yellow light
  • Blue light
The function of leaf in a plant is:
  • Respiration
  • Transpiration
  • Photosynthesis
  • All the above
Grana are present inside:
  • Mitochondria
  • Ribosome
  • Golgi bodies
  • Chloroplast
In aquatic plant – Hydrilla stomata are:
  • Present on stem
  • Present on roots
  • Absent
  • Present on leaves
The shape of stomata in monocot plant is:
  • Dumb-bell shape
  • Kidney shape
  • Heart shape
  • Bean shape
The photosynthetic pigments (chlorophyll) absorb light by converting sun's energy into
  • mechanical energy
  • Kinetic energy
  • chemical energy
  • Potential energy
Dark reaction of photosynthesis occurs in –
  • Grana
  • Stroma
  • Hemolysis
  • Plasmolysis
The type of starch produced during photosynthesis is:
  • Oligosaccharides
  • Monosaccharide
  • none of these
  • Polysaccharides
Respiration is the process in which -
  • energy is used up
  • energy is released and stored in the form of ATP
  • energy is stored in the form of ADP
  • energy is not released at all
Carbon monoxide has greater affinity for hemoglobin as compared to oxygen by-
  • 1000 times
  • 20 times
  • 2 times
  • 200 times
0 h : 0 m : 1 s

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