Photosynthesis in higher plants - 2 MarchContact Number: 9667591930 / 8527521718Photosynthesis in higher plants - 2 MarchContact Number: 9667591930 / 8527521718The oxygen evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements is involved in this reaction?
1. Magnesium and Chlorine
2. Manganese and Chlorine
3. Manganese and Potassium
4. Magnesium and Molybdenum
Anoxygenic photosynthesis is characteristic of
1. Rhodospirillum
2. Spirogyra
3. Chlamydomonas
4. Ulva
A process that makes important difference between C3 and C4 plants is
1. Photosynthesis
2. Photorespiration
3. Transpiration
4. Glycolysis
The correct sequence of cell organelles during photorespiration is
1. Chloroplast, – mitochondria, – peroxisome
2. Chloroplast, – vacuole, – peroxisome
3. Chloroplast, – Golgibodies, – mitochondria
4. Chloroplast, – Rough endoplasmic reticulum, – Dictyosomes
In Kranz anatomy, the bundle sheath cells have
| 1. | Thin walls, no intercellular spaces and several chloroplasts |
| 2. | Thick walls, many intercellular spaces and few chloroplasts |
| 3. | Thin walls, many intercellular spaces and no chloroplasts |
| 4. | Thick walls, no intercellular spaces and large number of chloroplasts |
CAM helps the plants in
1. Reproduction
2. Conserving water
3. Secondary growth
4. Disease resistance
PGA as the first CO2 fixation product was discovered in photosynthesis of
1. Alga
2. Bryophyte
3. Gymnosperm
4. Angiosperm
C4 plants are more efficient in photosynthesis than C3 plants due to
1. Lower rate of photorespiration
2. Higher leaf area
3. Presence of larger number of chloroplasts in the leaf cells
4. Presence of thin cuticle
Read the following four statements, a, b, c and d and select the right option having both correct statements. Statements:
a. Z scheme of light reaction takes place in presence of PSI only.
b. Only PS I is functional in cyclic photophosphorylation.
c. Cyclic photophosphorylation results into synthesis of ATP and NADPH2
d. Stroma lamellae lack PS II as well as NADP.
Options :
1. B and D
2. A and B
3. B and C
4. C and D
Kranz anatomy is one of the characteristics of the leaves of
1. Potato
2. Wheat
3. Sugarcane
4. Mustard
Study the pathway given below :
In which of the following options correct words for all the three blanks A, B and C are indicated ?
|
A |
B |
C |
|
|
1. |
Decarboxylation |
Reduction |
Regeneration |
|
2. |
Fixation |
Transamination |
Regeneration |
|
3. |
Fixation |
Decarboxylation |
Regeneration |
|
4. |
Carboxylation |
Decarboxylation |
Reduction |
Oxygenic photosynthesis occurs in:
1. Oscillatoria
2. Rhodospirillum
3. Chlorobium
4. Chromatium
Cyclic photophosphorylation results in the formation of
1. ATP and NADPH
2. ATP, NADPH and O2
3. ATP
4. NADPH
Stroma in the chloroplasts of higher plant contains:
1. Light-dependent reaction enzymes
2. Ribosomes
3. Chlorophyll
4. Light-independent reaction enzymes
The C4 plants are photosynthetically more efficient than C3 plants because
1. They have more chloroplasts
2. The CO2 compensation point is more
3. CO2 generated during photorespiration is trapped and recycled through PEP carboxylase
4. The CO2 efflux is not prevented
In leaves of C4 plants malic acid synthesis during CO2 fixation occurs in
1. Guard cells
2. Epidermal cells
3. Mesophyll cells
4. Bundle sheath
Electrons from excited chlorophyll molecule of photosystem II are accepted first by
1. Ferredoxin
2. Cytochrome - b
3. Cytochrome - f
4. Quinone
The first acceptor of electrons from an excited chlorophyll molecule of photosystem II is:
1. Quinone
2. Cytochrome
3. Iron-sulphur protein
4. Ferredoxin
In the leaves of C4 plants, malic acid formation during CO2 fixation occurs in the cells of:
1. Epidermis
2. Mesophyll
3. Bundle sheath
4. Phloem
In photosystem-I, the first electron acceptor is
1. Ferredoxin
2. Cytochrome
3. Plastocyanin
4. An iron-sulphur protein
During photorespiration, the oxygen consuming reaction(s) occur in
1. Stroma of chloroplasts and mitochondria
2. Stroma of chloroplasts and peroxisomes
3. Grana of chloroplasts and peroxisomes
4. Stroma of chloroplasts
Photosynthesis in C4 plants is relatively less limited by atmospheric CO2 levels because :
1. The primary fixation of CO2 is mediated via PEP carboxylase
2. Effective pumping of CO2 into bundle sheath cells
3. Four carbon acids are the primary initial CO2 fixation products
4. RuBisCO in C4 plants has a higher affinity for CO2
As compared to a C3 plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by C4 plants :
1. 2
2. 6
3. 0
4. 12
Photosynthetic Active Radiation (PAR) has the following range of wavelengths :
1. 400 - 700 nm
2. 450 - 950 nm
3. 340 - 450 nm
4. 500 - 600 nm
Chlorophyll-a molecule at its carbon atom 3 of the pyrrole ring II has one of the following
1. Carboxylic group
2. Magnesium
3. Aldehyde group
4. Methyl group
