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Topmadworld
Hey there,
It is C, Platelets
There are 4 types of macromolecules. They are Carbohydrates, Lipids, Proteins and Nucleic Acids.

Hope this helps :))

~Top

Platelet is not a macro-molecule.

There are four major macro-molecules in living organisms which include; proteins, carbohydrates, lipids, and nucleic acids.

Further Explanation

There exist four major macro-molecules in living organisms.

They include; Nucleic acids, proteins, carbohydrates, and lipids.

Nucleic Acids

  • Nucleic acids are one of the four major bio-molecules in nature. Nucleic acids is divided into two; RNA and DNA.
  • The building blocks of nucleic acids are Nucleotides which are made by a nitrogenous base, a sugar and a phosphate group.

1. DNA

  • DNA is a nuclei acid that is responsible for carrying genetic information in living organisms.

2. RNA

  • Ribonucleic acid (RNA) is a type of nucleic acid, a molecule that plays a major role in the flow of information from the DNA to the proteins.

Proteins  

  • Proteins are made up of amino acids which are the building blocks. Proteins perform various roles in organisms which includes; controlling metabolic processes, structural components, metabolic regulators, and sources of energy among others.
  • Amino acids monomers are joined together by peptide bonds to form polypeptides which then form proteins.

Carbohydrates  

  • Carbohydrates are bio-molecules that play important role in living organisms.
  • They are made up of monomers known as simple sugars or monosaccharides. They are classified as; Monosaccharides, disaccharides , and polysaccharides
  • Disaccharides are type of carbohydrates that are made up by joining two monomers of monosaccharides.
  • Polysaccharides are complex carbohydrates that are made up of many monomers of monosaccharides joined by glycosidic bonds.
  • Examples of polysaccharides include; starch, glycogen, cellulose, etc.

Lipids

  • Lipids are macromolecules that are composed of hydrocarbons and are important building blocks of structure of living organisms.
  • Examples of lipids include; oils, fats, some vitamins(A,D,E,K), waxes, hormones, etc.

Keywords: Macro-molecules, nucleic acids, proteins, carbohydrates, lipids

Learn more about;

  • Proteins; https://brainly.com/question/10744528
  • Amino acids: https://brainly.com/question/10744528
  • Carbohydrates; https://brainly.com/question/10744528
  • Classes of carbohydrates; https://brainly.com/question/10744528
  • Nucleic acids; https://brainly.com/question/12572965

Level: High school  

Subject: Biology  

Topic: Macro-molecules

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