Exploring the Building Blocks of Life: From Carbohydrates to Nucleic Acid Vaccines
1. Functions and Properties of Carbohydrates in Living Organisms
Carbohydrates play several vital roles in living organisms:
Functions:
- Energy Source: Carbohydrates, particularly glucose, are the primary energy source for cellular respiration.
- Energy Storage: Glycogen (in animals) and starch (in plants) store energy for later use.
- Structural Support: Cellulose provides rigidity and strength to plant cell walls.
- Transport of Energy: Sugars like sucrose transport energy within plants.
- Metabolic Regulation:
Genetic Engineering and DNA Technology
Plasmid
a small, circular, double-stranded DNA molecule that carries accessory genes separate from those of a bacterial chromosome; in DNA cloning, used as vectors carrying up to about 10,000 base pairs (10 kb) of DNA. Plasmids are also found in some eukaryotes, such as yeasts.
cDNA Library
A gene library containing clones that carry complementary DNA (cDNA) inserts. The library includes only the genes that were transcribed in the cells whose mRNA was isolated to make the cDNA.
DNA Microarray Assay
A
Read MoreHuman Evolution and Speciation: A Comprehensive Overview
Human Migration
Homo sapiens evolved in Africa about 300,000 years ago from H. heidelbergensis. About 70,000 years ago, Sapiens migrated from Africa and spread across the rest of the world, replacing populations of other human species.
Evidence from mtDNA supports this theory, as there is much more diversity in the mtDNA of modern Africans than in the rest of the world. Africa has greater genetic diversity due to mutations having more time to accumulate. In contrast, modern humans outside of Africa
Read MoreThe Importance of Biogeochemical Cycles in Ecosystems
Nutrient Cycling in Ecosystems
A nutrient is a chemical that is essential to living things and is cycled through ecosystems.
• Matter and nutrients are cycled through the biotic and abiotic environment. This process is known as a biogeochemical cycle.
The Water Cycle (the Hydrologic Cycle)
What is it and how does it work?
Common Terms
- Evaporation: Water turning to gas due to increased temperatures.
- Condensation: Gaseous water (vapor) turns into a liquid due to decreased temperatures.
- Precipitation: Any
Understanding Genetic Disorders: From Cri-du-Chat to Fragile X Syndrome
Cri-du-Chat Syndrome (Chromosome 5p Deletion Syndrome)
What is Cri-du-Chat Syndrome?
Cri-du-chat syndrome gets its name from the infant’s distinctive cry, which is high-pitched and sounds like a cat. This rare genetic disorder occurs in approximately 1 in 216,000 births. Individuals with Cri-du-chat syndrome have 46 chromosomes but are missing a piece of chromosome number 5.
Causes
Most cases are believed to occur during the development of the egg or sperm. In a small number of cases, a parent passes
Read MoreHistology of the Digestive, Urinary, and Salivary Systems
Mucosa
- Epithelium: Different types based on the region of GIT you are in.
- Lamina propria (loose areolar connective tissue)
- Muscularis mucosae (inner circular, outer longitudinal layer of smooth muscle).
Submucosa
- Made of loose areolar connective tissue
- The goodies – blood and lymph vessels, submucosal (Meisnner’s) nerve plexus – enteric nervous system (ENS).
Muscularis
- Skeletal muscles in the mouth, pharynx, upper and middle parts of oesophagus, and external anal sphincter.
- Smooth muscle in other regions
- Muscularis: