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[A]: DNA is associated with proteins. ...

[A]: DNA is associated with proteins.
[R]: DNA wound around histone proteins that form a pool and the entire structure is called nucleosome

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

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The correct Answer is:
A
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Assertion : DNA is associated with proteins. Reason : DNA binds around histone proteins that form a pool and the entire structure is called a nucleosome.

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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:-

The protein coat around a virus is called

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[A] : Histone proteins are synthesized during S phase . [R] : Histone proteins are found associated with DNA to form beed like nucleosomes .

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TRUEMEN BIOLOGY ENGLISH-Genetics-ASSERTION AND REASON
  1. [A): DNA replicates after mitosis. [R]: In mitosis, the chromosomal...

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  2. [A]: DNA code is copied in the synthesis of m-RNA. [R]: tRNA moves ...

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  3. [A]: DNA is associated with proteins. [R]: DNA wound around histone ...

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  4. [A]: Translocation involves transfer of genetic material between homol...

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  5. Assertion : Left-handed DNA is known as B-DNA. Reason : Right - han...

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  6. [A]: Meselson and Stahl tested the Watson and Crick Theory of DNA repl...

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  7. Assertion (A) : Adenine cannot pair with cytosine. Reason ® : Becaus...

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  8. Assertion : DNA is associated with proteins. Reason : DNA binds aro...

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  9. Assertion. The genetic code is degenerate. Reason. Most amino acids ...

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  10. Assertion A non-overlapping code means that a base in mRNA is not use...

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  11. [A]: Recombinant DNA contains DNA from two or more sources. [R]: Pl...

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  12. [A]: Genetic engineering is the use of technology to alter the genome ...

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  13. [A]: The Lac operon is an example of induc- ible system. [R]: When L...

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  14. [A]: Vectors carry the foreign DNA/gene into the host cell. [R]: Pl...

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  15. [A]: The series of enzyme controlled reactions determine traits in an ...

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  16. [A]: Raphanobrassica is an excellent example of allotertraploidy. [...

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  17. [A]: Plasmids are double .stranded extra chromosomal DNA. [R]: Plas...

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  18. Assertion (A) : Adenine cannot pair with cytosine. Reason ® : Becaus...

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  19. [A]: The base ratio (A+T )/(G+C) is constant in a particular organism....

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  20. [A]: Drosophila is commonly used in the study of genetics. [R]: Becau...

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