What do the 4 macromolecules do?
Nucleic acids: Stores and transfers info. Carbohydrates; Store energy, provide fuel, and build structure in body, main source of energy, structure of plant cell wall. Lipid: Insulator and stores fat and energy. Protein: Provide structural support,transport, enzymes, movement, defense.
Which macromolecules can you live without?
Carbohydrates and lipids make up the majority of structures in cells. Proteins make up the majority of enzymes and drive energy production in the cell. But none would exist without the genetic code stored by nucleic acids in DNA. We could not live without any of those molecules.
What are the 4 macromolecules of life?
The four major classes of biological macromolecules are carbohydrates, lipids, proteins, and nucleic acids.
Which macromolecule is shaped like a hexagon?
A monosaccharide is the monomer unit of carbohydrates, but some carbohydrates consist of only one monomer, such as glucose, fructose and galactose. Usually, these monosaccharides are most stable in a ring form, which is depicted diagrammatically as a hexagon.
What are the main macromolecules of life?
There are four major classes of biological macromolecules (carbohydrates, lipids, proteins, and nucleic acids), and each is an important component of the cell and performs a wide array of functions.
Who first isolated DNA?
Friedrich Miescher
How did Miescher isolated DNA?
Miescher collected bandages from a nearby clinic and washed off the pus. He experimented and isolated a new molecule – nuclein – from the cell nucleus. He determined that nuclein was made up of hydrogen, oxygen, nitrogen and phosphorus and there was an unique ratio of phosphorus to nitrogen.
Where did Miescher discovered DNA?
University of Tübingen
Why did Miescher use white blood cells?
As his pet cell for investigation, Miescher chose white blood cells, because they occurred as individual cells and were easy to obtain. Discarded bandages from a nearby surgical clinic provided pus from which intact white blood cells could be harvested.
What is the three-dimensional shape of DNA?
The three-dimensional structure of DNA—the double helix—arises from the chemical and structural features of its two polynucleotide chains.
What is the basic structure of DNA?
DNA is made of chemical building blocks called nucleotides. These building blocks are made of three parts: a phosphate group, a sugar group and one of four types of nitrogen bases. To form a strand of DNA, nucleotides are linked into chains, with the phosphate and sugar groups alternating.
How did Watson and Crick determine the three-dimensional shape of DNA?
The three-dimensional structure of DNA was first proposed by James Watson and Francis Crick in 1953. KEY FACTX-ray diffraction of DNA crystals results in a cross shape on the X-ray film, which is typical of a molecule with a helix shape.