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Nucleus in Cell

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Question

If there are 46 chromosomes in a cell,there will be 23 chromatin fibres inside the nucleus during interphase.
True or false

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Solution

Bache there will be 46 chromosome only. chromatin fibre condense and form chromosome only.

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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.

Q. The interphase nucleus has a loose and indistinct network of nucleoprotein fibres called chromatin, but during different stages of cell division, cells show "structured chromosomes" in place of the:

Q. How many following statements are correct?
(A) Nucleus as a cell organelle was first described by Robert Brown as early as 1651.
(B) The interphase nucleus has highly condensed nucleoprotein fibres called chromatin.
(C) During different stages of cell division, cells show structured chromatin in place of the nucleus.
(D) Every chromosome essentially has a primary constriction which is also known as NOR.
(E) Many membrane-bound minute vesicles called microbodies that contain various enzymes are present in both plant and animal cells.

Q. In cell cycle, during interphase,

What is the location of DNA in the cell before the formation of chromosomes or chromatin fibres?

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