DNA vs. RNA – 5 Key Differences and Comparison
Jan 22, 2024 · DNA is a much longer polymer than RNA. A chromosome, for example, is a single, long DNA molecule, which would be several centimetres in length when unraveled. RNA molecules are variable in length, but much shorter than long DNA polymers. A large RNA molecule might only be a few thousand base pairs long. Sugar.
Active vs Passive Immunity: Differences and Definition
Dec 18, 2023 · Active immunity is defined as immunity to a pathogen that occurs following exposure to all or part of that pathogen. When the body is exposed to a novel disease agent, a cascade of signaling molecules and action from the innate immune system results in activation of the adaptive immune system. Production of large numbers of T cells and B cells ...
Prokaryotes vs Eukaryotes: What Are the Key Differences?
Jun 26, 2024 · In prokaryotes, DNA is bundled together in the nucleoid region, but it is not stored within a membrane-bound nucleus. The nucleus is only one of many membrane-bound organelles in eukaryotes. Prokaryotes, on the other hand, have no membrane-bound organelles. Another important difference is the DNA structure.
SEM vs TEM - Technology Networks
Jan 24, 2024 · Even the basic microscope setup is different. In SEM, the sample, located at the base of the electron column, is scanned and the resulting electron scattering is analyzed to produce an image. In TEM, the sample is placed in the middle of the microscope and electrons pass through the sample before being collected.
UV-Vis Spectroscopy: Principle, Strengths and Limitations and ...
Dec 18, 2023 · Ultraviolet-visible (UV-Vis) spectroscopy is a widely used technique in many areas of science ranging from bacterial culturing, drug identification and nucleic acid purity checks and quantitation, to quality control in the beverage industry and chemical research. This article will describe how UV-Vis spectroscopy works, how to analyze the output data, the technique's strengths and limitations ...
GC-MS Principle, Instrument and Analyses and GC-MS/MS
Feb 16, 2024 · The sample mixture is first separated by the GC before the analyte molecules are eluted into the MS for detection. 1 They are transported by the carrier gas (Figure 1 (1)), which continuously flows through the GC and into the MS, where it is evacuated by the vacuum system (6). 1. The sample is first introduced into the GC manually or by an autosampler (Figure 1 (2)) and enters the carrier gas ...
Cation vs Anion: Definition, Chart and the Periodic Table
Jan 24, 2024 · Cations are ions that are positively charged. Anions are ions that are negatively charged. Ions are charged atoms or molecules. If a balanced atom loses one or more electrons, it will become a positively charged cation. If a balanced atom gains one or more electrons, it will become a negatively charged anion.
An Introduction to Culturing Bacteria - Technology Networks
Jan 24, 2024 · Bacteria are an essential part of the ecosystem. They are crucial to our health and the environment, have an important role in food production and provide bioengineers with tools to harness their properties and manufacture compounds. However, they can also be harmful, causing damage and disease. The ability to grow these microbes is therefore ...
Genotype vs Phenotype: Examples and Definitions
Sep 12, 2022 · Understanding the relationship between a genotype and phenotype can be extremely useful in a variety of research areas. A particularly interesting area is pharmacogenomics.Genetic variations can occur in liver enzymes required for drug metabolism, such as CYP450.Therefore, an individual’s phenotype, i.e. their ability to metabolize a specific drug, may vary depending on which form of the ...
Flagella, Cilia, Pili: What's the Difference? - Technology Networks
Nov 7, 2022 · Many organisms – ranging from single-cell protists to humans – rely on microscopic hair-like structures to perform a wide range of cell signaling and motility-related tasks. 1 Flagella, cilia and pili are all similar in shape, however, each possesses a different structure and biological function. This article outlines the features of flagella, cilia and pili, including their structure and ...