STD 12 - 11. organisms and populations — NEET STD 11 Science — Question

Choose incorrect statements from given characters of DNA and chromosome :
(i) Length of DNA double helix in a typical mammalian cell is calculated by multiplying the total number of bp with distance between two consecutive bp.
(ii) The length of DNA double helix in a typical mammalian cell is approximately 2.2 metres.
(iii) The dimension of a typical nucleus is approximately 10 m and it is larger than length of DNA.
(iv) In prokaryotes, DNA present in 'nucleoid' where DNA is organised in large loops held by proteins.
(v) In prokaryotes, negatively charged DNA is wrapped around the positively charged basic histone proteins octamer to form a structure called nucleosome.
(vi) Histones are rich in the basic amino acid residues lysines and arginines and both the amino acid residues carry positive charges in their side chains.

Energy storage at consumer level is called

What do you mean by the term dedifferentiation?

Statement I: All aquatic plants use water for pollination.
Statement II: Aquatic plants such as water hyacinth and water lily are pollinated by water.

In the taxonomic categories which hierarchial arrangement in ascending order is correct in case of animals?

Which of the following is correct sequence in Kreb's cycle

In which plant seed does not formed ?

Zero growth means :

Opening of floral buds into flowers, is a type of