Question
Describe the light harvesting complexes of photosystems.
✓
Answer
- The light harvesting complexes are aggregates of pigments organised within photosystem I and photosystem II.
- Each LHC is made up of hundreds of pigment molecules bound to certain proteins.
- In each LHC, one molecule of chlorophyll a forms the reaction centre, where the actual light reactions take place, while the other pigment molecules of the complex form the antennae; they absorb light at different wavelengths and pass it on to the reaction centre, to make the process more efficient.
- In PS I, the reaction centre is P700 which is a chlorophyll a molecule that has an absorption peak at 700 nm and in PS II, the reaction centre is PO which is a chlorophyll a molecule with an absorption peak at 680 nm.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Each plant or group of plants have some phylogenetic significance in relation to evolution: Cycas, one of the few living members of gymnosperms is called as the 'relic of past'. Can you establish a phylogenetic relationship to Cycas with any other group of plants that justifies the above statement?
Write the features that distinguish between the two,
Plasma and Serum.
Plasma and Serum.
Would a defoliated plant respond to photoperiodic cycle? Why?
Apart from chlorophyll, algae have several other pigments in their chloroplast. What pigments are found in blue-green, red and brown algae that are responsible for their characteristic colours?
Write brief note on the following
Synaptonemal complex.
Synaptonemal complex.
In botanical gardens and tea gardens, gardeners trim the plants regularly so that they remain bushy. Does this practice have any scientific explanation?
Distinguish between blind spot and yellow spot.
Arya went to a bird sanctuary with her family. She saw numerous birds there and was amazed by the colourful and vibrant world of flying birds. She also saw ostriches there but they were not flying seeing this, she asked her mother who is an ornithologist) why only birds can fly, while all other animals cannot. She also asked her mother about the birds that cannot fly.
Her mother explained Arya about birds and their characteristic features. Arya felt happy knowing knowledge:
- Which characteristic features of Aves.
- What are the flight adaptations of birds?
- Name few flightless birds.
- What values are shown by Arya?
Describe in detail the structure of a nephron.
