DNA stands for _________________________________ ______________.

Question

DNA controls all the _________________ ______________ which take place in cells.
DNA is a very large ______________ made up of a long ______________ of sub-units.
The sub-units are called ______________.
Each nucleotide is made up of:
• A sugar called ______________
• A ______________ group
• An organic ______________
____________is a sugar, like glucose, but with only five carbon atoms in its molecule.
______________ is almost the same but lacks one oxygen atom.
The most common organic bases are:
• ______________
• ______________
• ______________
• ______________
The deoxyribose, the phosphate, and one of the 4 bases combine to form a ___________.
A molecule of DNA is formed by millions of ______________ joined together in a __________ __________.
DNA usually consists of a __________ __________of nucleotides
The bases always pair up in the __________ way
• Adenine forms a bond with ______________.
• Cytosine bonds with ______________.
The paired strands are coiled into a spiral called a ______________. ______________.
Before a cell divides, the DNA strands ______________.and ______________.
Each strand makes a new ______________.by adding the appropriate ______________.
The result is that there are now _________double-stranded DNA molecules in the nucleus
So that when the cell divides, each nucleus contains ______________.DNA
This process is called ______________.
The sequence of bases in DNA forms the ______________. ______________.
A group of ____________ bases (a triplet) controls the production of a particular _______________
____________ in the cytoplasm of the cell
The different amino acids and the order in which they are joined up determines the sort of ____________
being produced
This is known as the ____________ ____________
Each ____________ codes for a specific ____________ ____________
The amino acids are joined together in the correct sequence to make part of a ____________
A sequence of ____________ in the DNA molecule may code for a complete ____________
Such a sequence forms a ____________

Answer 1

DNA stands for Deoxyribonucleic Acid.
DNA controls all the biochemical processes which take place in cells.
DNA is a very large molecule made up of a long chain of sub-units.
The sub-units are called nucleotides.
Each nucleotide is made up of:
• A sugar called deoxyribose
• A phosphate group
• An organic base
Deoxyribose is a sugar, like glucose, but with only five carbon atoms in its molecule.
Ribose is almost the same but lacks one oxygen atom.
The most common organic bases are:
• Adenine
• Thymine
• Cytosine
• Guanine
The deoxyribose, the phosphate, and one of the 4 bases combine to form a nucleotide.
A molecule of DNA is formed by millions of nucleotides joined together in a double helix.
DNA usually consists of a long chain of nucleotides.
The bases always pair up in the complementary way:
• Adenine forms a bond with Thymine.
• Cytosine bonds with Guanine.
The paired strands are coiled into a spiral called a double helix.
Before a cell divides, the DNA strands unwind and separate.
Each strand makes a new strand by adding the appropriate nucleotides.
The result is that there are now two double-stranded DNA molecules in the nucleus.
So that when the cell divides, each nucleus contains identical DNA.
This process is called replication.
The sequence of bases in DNA forms the genetic code.
A group of three bases (a triplet) controls the production of a particular amino acid in the cytoplasm of the cell.
The different amino acids and the order in which they are joined up determines the sort of protein being produced.
This is known as the genetic code.
Each triplet codes for a specific amino acid.
The amino acids are joined together in the correct sequence to make part of a protein.
A sequence of triplets in the DNA molecule may code for a complete protein.
Such a sequence forms a gene.