ดาวน์โหลดงานนำเสนอ
งานนำเสนอกำลังจะดาวน์โหลด โปรดรอ
1
Within the nucleus lies the chemical called deoxyribonucleic acid (or DNA; ดีเอ็นเอ ). This chemical codes for the characteristics of living things. For example, your hair colour and structure are a result of your individual DNA chemical. Human DNA is 98% identical to a chimpanzee DNA. Two random human beings will have DNA between 99.5 – 99.9% identical.
2
The structure of DNA is like a twisted ladder called a double helix ( สายเกลียวคู่ ). It is made up of the following: A sugar unit called deoxyribose ( น้ำตาลดีออกซีไรโบส ) A phosphate group ( หมู่ฟอสเฟต ) A base unit ( เบส ) The ‘sides of the ladder’ are made of the sugar and phosphate group and the ‘rungs’ are made of combinations of four different bases.
4
There are only four bases found in DNA: (A) Adenine; อะดีนีน (T) Thymine; เบสไทมีน (C) Cytosine; เบสไซโตซีน (G) Guanine; เบสกัวนีน Even though there are only four bases, the DNA strand consists of millions of individual bases paired up to form a DNA molecule. E.g. a human has 3 billion bases in its DNA.
6
Each unit made of a sugar, a base, and a phosphate group is called a nucleotide ( นิวคลีโอ ไทด์ ).
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