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What are histones?...

What are histones?

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Histones are a set of positively charged basic proteins associated with DNA helix.
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Histones are

Go through the following statements: (i) a typical nucleosome contains 400 bp of DNA helix. (ii) The positively charged DNA is wrapped around the negatively charged histoned octamer to form a structure called nucleosome. (iii) Histones are rich in the basic amino acid residues asparagine ad valine (iv) The packaging of chromatin at higher level requires additional set of proteins that collectively are referred to as nonhistone chromosomal proteins. Find out the wrong statements:-

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OSWAAL PUBLICATION-MOLECULAR BASIS OF INHERITANCE -TOPIC-2: Multiple Choice Questions
  1. What are histones?

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  2. In a DNA strand the nucleotides are linked together by :

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  3. A nucleoside differs from a nucleotide . It lacks the :

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  4. Both deoxyribose and ribose belong to a class of sugars called :

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  5. The fact that a purine base always paired through hydrogen bonds with ...

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  6. The net electric charge on DNA and histones is :

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  7. The promoter site and the terminator site for transcription are locate...

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  8. Which of the following statements is the most appropriate for sickle c...

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  9. One of the following is true with respect to AUG:

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  10. The first genetic material could be:

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  11. With regard to mature mRNA in eukaryotes :

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  12. The human chromosome with the highest and least number of genes in the...

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  13. Who amongst the following scientists had no contribution in the develo...

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  14. DNA is a polymer of nucleotides which are linked to each other by 3-5'...

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  15. Discontinuous synthesis of DNA occurs in one strand, because :

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  16. Which of the following steps in transcription is catalysed by RNA poly...

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  17. Control of gene expression takes place at the level of:

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  18. Regulatory proteins are the accessory proteins that interact with RNA ...

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  19. Which was the last human chromosome to be completely sequenced?

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  20. Which of the following are the functions of RNA?

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  21. While analysing the DNA of an organism a total number of 5386 nucleoti...

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