What is the location of DNA in the cell before the formation of chromosomes or chromatin fibres?
What is the location of following in the cell :
(b) Chromosome
(d) Nucleolus
What is the difference between chromatin fibre and chromosome ?
Correct the following statements if there is any mistake.
(a) The four nitrogenous bases in the DNA are Guanine, Thiamine, Adrenaline and Cytosine.
(b) Genes are specific sequences of bases on a chromosome.
(c) A nucleotide is composed of a sulphate, a sugar, (pentose) and a nitrogenous base.
(d) Nucleosomes are groups of cysteine molecules surrounded by DNA strands.
(e) If there are 46 chromosomes in a cell, there will be 23 chromatin fibres inside the nucleus during interphase.