Cell Biology
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What is the focus of biochemistry?
The study of molecules in living creatures Biochemistry helps in understanding the molecular makeup of cells and their functions.
What are lipids primarily composed of?
Hydrogen, carbon, and oxygen Lipids are poorly dissolvable in water and serve as a source of high energy.
What is the structure of fats?
A molecule of glycerol and three fatty acid molecules Fats are stored in the cells of the body for energy.
What differentiates phospholipids from fats?
Phospholipids have two fatty acid groups and a phosphate group This structure leads to hydrophilic and hydrophobic properties important for cell membranes.
What is the role of carbohydrates in cells?
Supply energy and provide structure Monosaccharides are the simplest form of carbohydrates.
What is the formula for monosaccharides?
(CH2O)n ‘n’ indicates the number of carbon atoms in the molecule.
What are the five-carbon sugars found in genetic material?
Ribose and deoxyribose These sugars are essential for the structure of nucleic acids.
What is glucose commonly referred to as?
Blood sugar Glucose is crucial for energy in cells and is monitored in the blood.
What condition is characterized by high blood sugar levels due to improper utilization?
Diabetes Diabetes requires treatment to lower blood sugar levels.
What are polysaccharides made of?
Many monosaccharides An example of a polysaccharide is glycogen, which stores energy.
What is glycogen used for?
To store energy within the cell Glycogen is formed when monosaccharides are assembled into a long chain.
What are glycoproteins?
Polysaccharides joined with protein molecules Glycoproteins assist in building cell structure.
What percentage of the dry weight of animals is made up of proteins?
50% Proteins are crucial for the structure and function of cells.
What are proteins composed of?
Many amino acids There are twenty-two different amino acids used to form proteins.
What is the chemical structure of glycerol?
Glycerol has the formula HO—C-R, where R is a long hydrocarbon chain fatty acid.
What are the chemical structures of glucose and fructose?
Glucose and fructose are simple sugars with the following structures: Glucose: CH2OH, Fructose: C6H12O6
What is the role of amino acids in proteins?
A single protein can include 200 to 300 amino acids, which are joined together to form complex structures.
What are the functions of proteins in cells?
Proteins have many functions, including muscle contraction, acting as enzymes, adding strength to structures, and aiding in transport.
What are antibodies?
Antibodies are infection-fighting proteins found in blood that help to carry oxygen, stop bleeding, and fight off infection.
What are purines?
Purines are nitrogenous bases that include adenine and guanine.
What are pyrimidines?
Pyrimidines are nitrogenous bases that include thymine, cytosine, and uracil.
What are the components of a nucleotide?
A nucleotide is made up of a five-carbon sugar, a phosphate group, and a nitrogen-containing base.
What sugar does RNA contain?
RNA contains ribose as its sugar.
What sugar does DNA contain?
DNA contains deoxyribose as its sugar.