Question

1.1.5 dna evidence
dna is made of building blocks called nucleotide
each nucleotides is made up of 3 components:

• phosphate group
• a sugar
• one of four nitrogenous bases

the 4 types of nitrogenous bases (and a sketch of their ring or rings)
adenine thymine guanine cytosine
the and make up the backbone of dna. the base is connected to the.
the bases pair together to form the double helix. pairs to with 2 hydrogen bonds, while pairs to with 3 hydrogen bonds..
what is a gene, and what does it code for?
explain the differences between eukaryotic and prokaryotic cells.
eukaryotic cells prokaryotic cells

Explanation:

DNA nucleotides have phosphate, sugar and nitrogen - containing bases. Phosphate and sugar form the DNA backbone. Adenine pairs with Thymine via 2 hydrogen bonds, Guanine pairs with Cytosine via 3 hydrogen bonds. A gene is a DNA segment coding for proteins or functional RNA. Eukaryotic cells have a nucleus and membrane - bound organelles, while prokaryotic cells lack a nucleus and most organelles.

Answer:

1. Nucleotides are made of phosphate group, a sugar, one of four nitrogenous bases.
2. Phosphate; sugar; sugar.
3. Adenine; Thymine; Guanine; Cytosine.
4. A gene is a segment of DNA. It codes for proteins or functional RNA molecules.
5. Eukaryotic cells: Have a true nucleus, have membrane - bound organelles, larger and more complex. Prokaryotic cells: Lack a true nucleus (have a nucleoid), lack most membrane - bound organelles, smaller and simpler.