STD 11 - 9. Biomolecules — NEET STD 11 Science — Question

The destruction of the biological nature and activity of proteins by heat or chemical agent is called:

In Operon concept, the regulator gene regulates chemical reactions in the cell by

The process of transfer of pollen grains from another to stigmatic surface of the flower with the help of water is called

The salinity is ............ in hypersaline lagoons

Which of the following statements is incorrect?

Choose correct statements for plant growth regulators :
(i) The discovery of each of the five major groups of PGRs has been accidental.
(ii) Charles Darwin and his son Francis Darwin observed that the coleoptiles of canary grass shows phototropism.
(iii) Auxin was isolated by F.W. Went from tips of coleoptiles of oat seedlings.
(iv) Skoog and Miller identified and crystallised abscisic acid (ABA).
(v) Inhibitor-B, abscission II and dormin were chemically identical and named kinetin.
(vi) Release of ethylene from ripened oranges hastened the ripening of stored unripened bananas.

Habitat loss and fragmentation, over exploitation, alien species invasion and co-extinction are causes for

Eye of potato is

Oxidative phosphorylation occurs in