Answering DNA Notes

For today's science lesson, we went through the notes on DNA and answered a few questions on it. We also had completed some parts on the cells worksheet. I felt that the questions were quite challenging!

3 Thoughts:
1) Letters in DNA has a special name which is called nitrogenous bases. Each of the letters is attached to a molecule of sugar while a phosphate molecule will attach to the sugar molecule. As both sugar and phosphate molecule is attached to one another, the sugar-phosphate will form the backbone of DNA.
2) I have learnt that nucleotide, which is a building block of DNA, is formed when the each of the bases, sugars and phosphates are linked together.
3) When the double stranded DNA is twisted like a spiral staircase with a hollow interior, it is called DNA double helix. The DNA is covered with proteins, chromatin and chromatids which will then form chromosome. Chromatin wound around the proteins so as to help join the DNA and prevent it from breaking.

2 Questions:
1) Will there be an ending in DNA strand?
2) Won't the DNA break if both the proteins and chromatin are removed?

1 Useful application:
1) With the help of the descriptions of a DNA, we can roughly know how a DNA strand looks like. We are also able to understand what surround the DNA and their functions in helping the DNA.

(DNA strands)
 

Sources: Google Images