1.Chemical composition of DNA is -It is long chain polymer composed of monomers called nucleotides.Each nucleotide is composed of three subunits.These are a)Nitrogen base,b)Sugar,c)Phosphate. a)Nitrogen bases:Pyrimidines and Purines b)Sugar:Ribose sugar c)Phosphate:one central phoshporous with 4 oxygen atoms 2.Replication and its importance: DNA replication is the biological process of producing two identical replicas of DNA from one original DNA molecule. The importance of this process is that it occurs in all living organisms and it is the basis for biological inheritance.If DNA never replicated,meiosis and mitosis would slowly halves the size of the genome until each cell would die,which probably would not take long. 3.Function of Protein synthesis: Protein synthesis is important because proteins control the activities of cells.Without these many of the processes in the body would fail or not work properly. 4.Comparison of Transcription and Translation: Transcription is the synthesis of RNA from a DNA template where the code is converted into a complementry RNA code whereas Translation is the synthesis of a protein from an mRNA template where the code in the mRNA is converted into an aminoacid sequence in a protein. 5.List and functions of three types of RNA: a)mRNA or Messanger RNA --Its function is that it transcribes the genetic code from DNA into a form that can be read and used to make proteins.mRNA carries genetic information from the nucleus to the cytoplasm of a cell. b)rRNA or Ribosomal RNA --Its function is that it directs the translation of mRNA into Proteins. c)tRNA or Transfer RNA--It brings or transfers aminoacids to the ribosomethat corrosponds to each three nucleotidecondon of rRNA.The aminoacids then can be joined together and processed to make polypeptides and proteins. 6)Compare and contrast DNA and RNA: DNA is a long polymer with deoxyriboses and phosphate backbone,having four different nitrogeneous bases:adenine,guanine,cytosine and thymine.Whereas RNA is a polymer with a ribose and phosphate backbone,having foue nitrogeneous bases:adenine,guanine,cytosine and uracil. 7)Semiconservative nature of DNA:In this replication would produce two copies that contained one of the original strands and one new strand. Solution 1.Chemical composition of DNA is -It is long chain polymer composed of monomers called nucleotides.Each nucleotide is composed of three subunits.These are a)Nitrogen base,b)Sugar,c)Phosphate. a)Nitrogen bases:Pyrimidines and Purines b)Sugar:Ribose sugar c)Phosphate:one central phoshporous with 4 oxygen atoms 2.Replication and its importance: DNA replication is the biological process of producing two identical replicas of DNA from one original DNA molecule. The importance of this process is that it occurs in all living organisms and it is the basis for biological inheritance.If DNA never replicated,meiosis and mitosis would slowly halves the size of the genome until each cell would die,which probably would no.

1. 1.Chemical composition of DNA is -It is long chain polymer composed of monomers called
nucleotides.Each nucleotide is composed of three subunits.These are a)Nitrogen
base,b)Sugar,c)Phosphate.
a)Nitrogen bases:Pyrimidines and Purines
b)Sugar:Ribose sugar
c)Phosphate:one central phoshporous with 4 oxygen atoms
2.Replication and its importance:
DNA replication is the biological process of producing two identical replicas of DNA from one
original DNA molecule.
The importance of this process is that it occurs in all living organisms and it is the basis for
biological inheritance.If DNA never replicated,meiosis and mitosis would slowly halves the size
of the genome until each cell would die,which probably would not take long.
3.Function of Protein synthesis:
Protein synthesis is important because proteins control the activities of cells.Without these many
of the processes in the body would fail or not work properly.
4.Comparison of Transcription and Translation:
Transcription is the synthesis of RNA from a DNA template where the code is converted into a
complementry RNA code whereas Translation is the synthesis of a protein from an mRNA
template where the code in the mRNA is converted into an aminoacid sequence in a protein.
5.List and functions of three types of RNA:
a)mRNA or Messanger RNA --Its function is that it transcribes the genetic code from DNA into
a form that can be read and used to make proteins.mRNA carries genetic information from the
nucleus to the cytoplasm of a cell.
b)rRNA or Ribosomal RNA --Its function is that it directs the translation of mRNA into Proteins.
c)tRNA or Transfer RNA--It brings or transfers aminoacids to the ribosomethat corrosponds to
each three nucleotidecondon of rRNA.The aminoacids then can be joined together and processed
to make polypeptides and proteins.
6)Compare and contrast DNA and RNA:
DNA is a long polymer with deoxyriboses and phosphate backbone,having four different
nitrogeneous bases:adenine,guanine,cytosine and thymine.Whereas RNA is a polymer with a
ribose and phosphate backbone,having foue nitrogeneous bases:adenine,guanine,cytosine and
uracil.
7)Semiconservative nature of DNA:In this replication would produce two copies that contained
one of the original strands and one new strand.

2. Solution
1.Chemical composition of DNA is -It is long chain polymer composed of monomers called
nucleotides.Each nucleotide is composed of three subunits.These are a)Nitrogen
base,b)Sugar,c)Phosphate.
a)Nitrogen bases:Pyrimidines and Purines
b)Sugar:Ribose sugar
c)Phosphate:one central phoshporous with 4 oxygen atoms
2.Replication and its importance:
DNA replication is the biological process of producing two identical replicas of DNA from one
original DNA molecule.
The importance of this process is that it occurs in all living organisms and it is the basis for
biological inheritance.If DNA never replicated,meiosis and mitosis would slowly halves the size
of the genome until each cell would die,which probably would not take long.
3.Function of Protein synthesis:
Protein synthesis is important because proteins control the activities of cells.Without these many
of the processes in the body would fail or not work properly.
4.Comparison of Transcription and Translation:
Transcription is the synthesis of RNA from a DNA template where the code is converted into a
complementry RNA code whereas Translation is the synthesis of a protein from an mRNA
template where the code in the mRNA is converted into an aminoacid sequence in a protein.
5.List and functions of three types of RNA:
a)mRNA or Messanger RNA --Its function is that it transcribes the genetic code from DNA into
a form that can be read and used to make proteins.mRNA carries genetic information from the
nucleus to the cytoplasm of a cell.
b)rRNA or Ribosomal RNA --Its function is that it directs the translation of mRNA into Proteins.
c)tRNA or Transfer RNA--It brings or transfers aminoacids to the ribosomethat corrosponds to
each three nucleotidecondon of rRNA.The aminoacids then can be joined together and processed
to make polypeptides and proteins.
6)Compare and contrast DNA and RNA:
DNA is a long polymer with deoxyriboses and phosphate backbone,having four different
nitrogeneous bases:adenine,guanine,cytosine and thymine.Whereas RNA is a polymer with a
ribose and phosphate backbone,having foue nitrogeneous bases:adenine,guanine,cytosine and
uracil.
7)Semiconservative nature of DNA:In this replication would produce two copies that contained
one of the original strands and one new strand.