General Biology Quick Review: DNA (Quick Review Notes)
With the help of genetic mutations, evolution has driven the development of life, capable of thriving in almost any environment on Earth. The process of evolution is visible in all aspects of life.
Introduction to genetics
Obvious similarities in structure and function of different species are hard to ignore and the collection of evidence supporting the theory of evolution has become undeniable. There is a huge array of sub-disciplines or branches of biology; all up more than Many have been around for hundreds of years, whilst others are far newer and are often developing very rapidly. Fields of study such as evolution, ecology, and genetics are themselves very broad topics and contain many specializations within each field.
For example, an ecologist, who looks at how organisms interact with each other and the environment, might specialize in marine ecology, population ecology, plant ecology or freshwater ecology. As biology is such a broad field of study, the work from one biologist to another may be completely different. An agriculturalist for example, who is interested in the production of crops, will focus on very different content to that of an ethologist, who studies the behavior of animals.
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Our brilliantly simple book will take you through the fundamentals of biology in a way that is easy to follow and avoids difficult science jargon. Easy and enjoyable to read, the book introduces topics such as genetics, cells, evolution, basic biochemistry, the broad categories of organisms, plants, animals, and taxonomy. This is the resource that I recommend above anything else for aspiring biologists. Learn about animals, plants, evolution, the tree of life, ecology, cells, genetics, fields of biology and more.
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Why not test yourself with our quick 20 question quiz. Cells are the basic unit of life. Genes are the basic units for passing traits from parent to offspring.
Living things maintain the environment within their cells and bodies. Living things have the ability to acquire and transform energy. Energy and enzymes Free energy: ATP and reaction coupling: Energy and enzymes Introduction to enzymes: Energy and enzymes Enzyme regulation: Structure of a cell.
Introduction to Genetics | Basic Biology
Structure of a cell Prokaryotic and eukaryotic cells: Structure of a cell Tour of a eukaryotic cell: Extracellular structures and cell-cell junctions: Membranes and transport Diffusion and osmosis: Membranes and transport Passive transport: Membranes and transport Bulk transport: Introduction to cellular respiration: Cellular respiration Steps of cellular respiration: Pyruvate oxidation and the citric acid cycle: Cellular respiration Oxidative phosphorylation: Cellular respiration Variations on cellular respiration: Photosynthesis The light-dependent reactions: Photosynthesis The Calvin cycle: C3, C4, and CAM plants: How cells signal to each other: Cell signaling Communication in single-celled organisms: Introduction to cell division: Cell division The cell cycle and mitosis: Cell cycle regulation, cancer, and stem cells: Classical and molecular genetics.
Classical and molecular genetics Variations on Mendelian genetics: Classical and molecular genetics Chromosomal basis of genetics: Classical and molecular genetics Molecular basis of genetics: It provides cells with the information they need to perform tasks that allow an organism to grow, survive and reproduce.
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A gene is one particular section of a DNA molecule that tells a cell to perform one specific task. Heredity is what makes children look like their parents. During reproduction, DNA is replicated and passed from a parent to their offspring. This inheritance of genetic material by offspring influences the appearance and behavior of the offspring.
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The environment that an organism lives in can also influence how genes are expressed. DNA is the cornerstone of genetics and is the perfect place to start for an introduction to genetics. DNA stands for deoxyribonucleic acid and it is the molecule that holds the genetic information for a cell and an organism. A DNA molecule contains a code that can be used by a cell to express certain genes.
Introduction to Biology
Specific sections of a DNA molecule provides the information to build specific proteins which can then be used by a cell to express the desired gene. A DNA molecule is a nucleic acid, one of the four molecules of life. It comes in the form of a long, linear molecule referred to as a strand. In eukaryotic cells , DNA is found in the nucleus as a tightly coiled double helix.
DNA molecules are replicated during cell division. When a cell divides, the two new cells contain all the same DNA that the original cell had. In sexual reproduction with two parents, half of the DNA of the offspring is provided by each of the parents. A gene is a specific segment of a DNA molecule that holds the information for one specific protein. DNA molecules have a unique code for each gene which codes for their specific protein.