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the major chemical components of chromos...

the major chemical components of chromosome are DNA ,RNA ,histones and nonhistones protein Besides ,there is sone very important inoranic chemcal,which si :

A

iron

B

calcium

C

chromium

D

magnesium

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The correct Answer is:
B
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Assertion : Histones are basic proteins of major importance in packaging of eukaryotic DNA, DNA and histones comprise chromatin forming the bulk of eukaryotic chromosome . Reason : Histones are five major types H_(1), H_(2)A, H_(2)B, H_(30 and H_(4)

Read the following text and answer the following questions on the basis of the same: Mutation is sudden, discontinuous variation in genotype of an organism due to a change in its chromosomes and genes. Variation in DNA is a result of mutation. It is of three types : Gene mutation, chromosomal aberrations and gametic mutation. Gametic mutation is a change in chromosome number that brings effect on the phenotype, it is of two type - aneuploidy and euploidy. Mutation can be artificially produced by certain agents called mutagen. There are two major types of mutagens: physical and chemical mutagen. Which is the main category of mutation ?

Read the following text and answer the following questions on the basis of the same: Mutation is sudden, discontinuous variation in genotype of an organism due to a change in its chromosomes and genes. Variation in DNA is a result of mutation. It is of three types : Gene mutation, chromosomal aberrations and gametic mutation. Gametic mutation is a change in chromosome number that brings effect on the phenotype, it is of two type - aneuploidy and euploidy. Mutation can be artificially produced by certain agents called mutagen. There are two major types of mutagens: physical and chemical mutagen. Aneuploidy which occurs due to loss of a complete homologous pair of chromosomes is :

Assertion. Histones are basic protein of major importance in packaging of eukaryotic DNA. DNA and histone comprise chromatin forming bulk of eukaryotic chromosome. Reason. Histones are five major types H_(1), H_(2)A, H_(2)B, H_(3) and H_(4) .

Nucleic acids are the biopolymers in which the repeating structural monomeric units is a nucleotide. The nucleotides structural monomeric unit is a nucleotide. The nucleotides consist of three components, a pentose sugar (D-(0)-" ribose or 2 - deoxy "-D-(-)-"ribose, heterocyclic base") , (purines i.e., adenine and guanine and pyrididines i.e., thymine, cytosine and uracil) and phosphoric acid. Sugar - base constitutes nucleosides. the two types of nucleic acids are DNA and RNA. Nucleic acids play significant role in replication and protein synthesis. Name the base which is present in RNA but not in DNA.

Nucleic acids are the biopolymers in which the repeating structural monomeric units is a nucleotide. The nucleotides structural monomeric unit is a nucleotide. The nucleotides consist of three components, a pentose sugar (D-(0)-" ribose or 2 - deoxy "-D-(-)-"ribose, heterocyclic base") , (purines i.e., adenine and guanine and pyrididines i.e., thymine, cytosine and uracil) and phosphoric acid. Sugar - base constitutes nucleosides. the two types of nucleic acids are DNA and RNA. Nucleic acids play significant role in replication and protein synthesis. If one of hte strands of DNA has the following sequence of bases in the 5' - 3' direction. 5'-A-G-T-C-A-A-G-3' Which base is closest to the 5' - end in the compementary strand?

GRB PUBLICATION-CHROMOSOMAL BASIS OF INHERITANCE-Chromosome mapping
  1. which histones protein is not a part of nucleosome ?

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  2. Histone occupies the major grooves of DNA at an angle of

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  3. the major chemical components of chromosome are DNA ,RNA ,histones and...

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  4. Solenoid is a strcture of :

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  5. The length of DNA molecile greatly exceeds the dimensions of the nucle...

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  6. the basic set of vhromosomes in an organism is known is known as :

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  7. the terms 'genome ' refers to set the total number of genes contaained...

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  8. How many genomes are pesent in the skin cell of man ?

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  9. Diploid chromosome number in humans is :

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  10. if the root cell in wheat plant has 42 chromosome ,then the number of ...

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  11. if here are 16 chromosome in the roots of union ,then the number of ch...

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  12. the planrt with lowest chromosome number is :

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  13. the haploid chromosome number in allium cepa is as many times greater...

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  14. there are 44 chromosomes in the somatic cells of rabbit How many chrom...

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  15. Dipiod number of chromosome in gorilla gorilla may cells .

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  16. Humans normally have 46 chromosomes inkidney cells . . How many autos...

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  17. which of the following is having lowest number of chromosomes ?

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  18. the largest number of chromosomes are found in :

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  19. the chromosome cannot be stained with :

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  20. Which of the following is not related to chromosome ?

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