Table of Contents
What are the 4 DNA base pairs?
There are four nucleotides, or bases, in DNA: adenine (A), cytosine (C), guanine (G), and thymine (T). These bases form specific pairs (A with T, and G with C).
Which molecule does each base attach to?
Deoxyribose
6. To which molecule does each base attach? Deoxyribose.
How many phosphate groups are on the left side of the structure?
This nucleotide contains the five-carbon sugar deoxyribose (at center), a nucleobase called adenine (upper right), and one phosphate group (left).
How does the bases pair up?
Base Pair The two strands are held together by hydrogen bonds between the bases, with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.
What is the structure of DNA left side right side?
The left side shows the double stranded composition, the right side the famous double helix of the molecule (from The National Human Genome Research Institute (2002)).
What are the two bases that always pair together in DNA?
Only certain bases can pair together to form base pairs. In DNA, Adenine (A) always pairs with thymine (T), and guanine (G) always pairs with cytosine (C). Notice that in the two figures above, the two strands of a DNA molecule are antiparallel , that is, they run in different directions.
What makes up the two sides of a nucleotide?
Each nucleotide is itself make of three subunits: And one of four nitrogen-containing molecules called nucleotides . (Labeled A, T, C, or G) Alternating sugar and phosphate units form the two sides of a ladder-shaped arrangement with the rungs or steps each formed by a pair of nucleotide bases.
How are the bases of a DNA molecule abbreviated?
Or, even easier, a section of a DNA molecule is often abbreviated to show the bases of just one strand: Knowing the base pairing convention of A always pairing with T and G always pairing with C makes the complementary strand of the molecule understood.
How are the two sides of a DNA molecule antiparallel?
Notice that in the two figures above, the two strands of a DNA molecule are antiparallel , that is, they run in different directions. The side of the chain on the left begins with a free phosphate group at the top and ends with a sugar molecule at the bottom.