STD 11 - 3. Plant kingdom — NEET STD 11 Science — Question

Pattern of organisation of cilia and flagella is

Arrange the following in proper sequence as occurring in z-scheme :
(1) Excitation of electrons of PS-II.
(2) Down hill transfer of electrons to PS-I.
(3) Excitation of electrons and transfer to another acceptor.
(4) Uphill transfer of electrons to acceptor.
(5) Down hill transfer of electrons causing NADP⁺ to reduce into NADPH+H⁺.

Pyrenoids are characteristically found in the chloroplast of

Assertion: hnRNA is subjected to a processing called splicing, capping and tailing.
Reason: In eukaryotes, the primary transcripts called hnRNA is non-functional.

Which statement is correct for photosynthesis regarding light ?
(i) There is a linear relationship between incident light and CO₂ fixation rates at low light intensities
(ii) At higher light intensities, gradually the rate does not show further increase as other factors become limiting
(iii) Light saturation occurs at 10 per cent of the full sunlight. Hence, except for plants in shade or in dense forests, light is rarely a limiting factor in nature
(iv) Increase in incident light beyond a point causes the breakdown of chlorophyll and a decrease in photosynthesis
(v) When light intensity increase than first rate of photosynthesis increase then becomes constant due to CO2 becomes limiting factor

A characteristic of angiosperms is

The stage of meiosis where centromere separate

Generally the food chain has how many trophic levels