Nucleus accumbens

death. So it’s a must these cells maintain order to keep the human body moving. There is a linkage between the organelles within a cell. One of which is the nucleolus and mitochondria. For starters, the nucleolus is a spherical region inside of the nucleus that has an amazing function.…

Introduction DNA makes up the genetic material for all organisms. However, not all organisms have distinct molecules working with DNA that come together to make up chromatin. Chromatin is only found in eukaryotic cells, the cellular makeup of multicellular organisms. The structure of chromatin is composed of DNA and histones, together making up nucleosomes, and other non-histone proteins that bind to the DNA. The backbone of DNA is negatively charged and histones have a positive charge…

Prokaryotes can be recognized as a single-celled organism that lack the extensive internal compartments. Unlike eukaryotes, the prokaryotes concentrated their genetic materials in a small portion of cell’s cytoplasm known as nucleoid. Almost entire prokaryotic genome is contained in a single circular DNA strand that is supercoiled. Some additional genes are located on an independent small, circular or linear plasmids which coding for extra properties likes antibiotic resistance (Brown, 2002).…

Prokaryotes are all unicellular and are less advanced than eukaryotes; meaning that they lack a nucleus and only have a nucleoid region. They also lack membrane bound organelles. Prokaryotes are then broken into two kingdoms, Bacteria and Archaea. Bacteria are the less advanced of the two and is believed that Archaea advanced from Bacteria and then eukaryotic cells advanced from Archaea. Eukaryotic cells have a nucleus and membrane bound cells. It is believed that the first Eukaryotic cell…

PROKARYOTIC AND EUKARYOTIC CELLS https://www.google.co.uk/search?q=images+of+prokaryotic+and+eukaryotic+cell&safe=active COMPARISON OF THE STRUCTURE OF EUKARYOTIC AND PROKARYOTIC CELLS STRUCTURE EUKARYOTIC CELL PROKARYOTIC CELL Nucleus Present Absent Cytoplasm Present Present Mitochondria Present Absent Chloroplasts Present Absent Endoplasmic Reticulum Present Absent Ribosomes Relatively large Small Cytoskeleton Present Absent Chromosomes DNA arranged in several DNA arranged in…

Metaphase I (MI) (Assembly of meiotic apparatus) During Metaphase I, Chromosomes move together along the metaphase plate. DNA replication, repair spindle function, and chromosome segregation are controlled by regulatory mechanisms of spindle assembly checkpoints (Elledge, 1996). The cellular spindle apparatus includes the spindle microtubules, associated proteins, and any centrosomes or asters present at the spindle poles. The dynamic lengthening and shortening of spindle microtubules (Mitchison…

Every living cell contains genetic information in the form of chromosomal DNA. Chromosomes can be circular in prokaryotic, or simpler single-celled organisms such as bacteria, but tend to be linear in more complex eukaryotic cells. The replicon, or the enzymatic complex that replicates DNA has limitations on its efficiency and capabilities. For example, eukaryotic DNA polymerase requires a short RNA primer to begin replication on the lagging strand, because of this replication cannot continue…

INTRODUCTION Biological ageing, or senescence, is a complex process characterised by progressive functional deterioration and cognitive decline (1). Accumulation of age related changes make individuals more prone to death and disease (2). Understanding these changes is important to understand the complexity of the human lifespan. The Hallmarks of Aging (3), is an article which describes nine factors that contribute to the ageing process. Aggravation or alleviation of these could contribute to…

lack of Nucleus in fact the name Prokaryote actually gives you a hint about its structure. “Pro” means before and “kary” means nucleus. The inside of Prokaryote cell is a single-celled organism and basically an open unit with no compartments. There is no membrane bound organelles. However, small structures called Ribosomes are scattered throughout Cytoplasm. The cell’s DNA is located in the region of Cytoplasm called the Nucleoid region. The Nucleoid region is not the same thing as Nucleus…

Every cell in the body has a nucleus. The nucleus is the largest organelle and is contained within a membrane. The nucleus contains the body’s genetic material, which directs the activities, like the brain of the cell. This is built from DNA and proteins called histones coiled together forming a fine network of threads called chromatin. When under the microscope the most prominent part of the cell is the nucleus. The most visible structure within the nucleus is the nucleolus, which is where…