Nucleus accumbens

The nucleolus which is also known as the brain of a cell, is the most significant part in the nucleus. It takes up about 25 percent of the nucleus and it is not surrounded by a membrane. Through a microscope, the nucleolus is a big dot in the middle of it. It can be found in an animal, plant, diploid, and eukaryotic cell. It was found in the eighteenth century but its function wasn’t discovered until the 1960s. The nucleolus lives in the nuclear matrix. Sadly, the nucleolus is one of the…

Nucleus: The nucleus is the control centre of the cell. It’s much like a blueprint that contains all of the instructions on building the body. It contains genetic material called DNA. This DNA has instructions for building proteins and is essential to cell reproduction. If a cell doesn’t have a nucleus for whatever reason will certainly die. The nucleus conforms to the shape of the cell so it could be oval or it could be spherical. The nucleus has three recognizable regions; the nuclear…

The results in this lab for Interphase had twenty cells, Prophase had ten cells, Metaphase had three cells, Anaphase has two and last Telophase, which had only one cell. The results shows that Interphase took the longest for completion and Prophase was the second longest for completion. Telophase took the shortest time for completion. The percentages for each mitosis stage and Interphase was fifty-six percent for Interphase, twenty-eight percent for Prophase, eight percent for Metaphase, six…

Deoxyribonucleic acid (DNA) is the hereditary material. It is a polynucleotide and is a double helix composed of two strand that run in opposite direction1. Each strand of DNA consist of a sugar molecule (deoxyribose), nitrogen base (adenine-A, guanine-G, thymine-T and cytosine-S) and a phosphate group. Adenine and guanine are double-ringed molecules known as purines while thymine and cytosine are single-ringed molecules known as pyrimidines1. Within the DNA molecule, the sugar molecules are…

1.3 Histone variants Histone variants are non-allelic isoforms of core histones that have specialized functions resulting from its distinct amino acid constitution. All histone families except for H4 histone have variant forms (Kamakaka and Biggins, 2005). Unlike core histones, which are only expressed during S phase, histone variants are continuously expressed throughout the cell cycle and incorporated into DNA in a replication-independent manner (Sansoni et al., 2014). A great number of…

Cells signals can be mainly described as chemical, prokaryotes have sensors capable of detecting nutrients which helps them find food these signals can either be long distance or short distance some of the short distance could be found in muscle cells and a long distance can be describe as the releasing of an egg in the ovaries. Cells have protein receptors which will bind to protein signaling molecules triggering a respond in the molecules. Different receptors are specific for different…

be bounded by a plasma membrane (Biology Department,2015), and contain a nucleic acid: such as DNA, RNA, cytoplasm, and ribosomes. The things that prokaryotes will not have are organelles. Organelles can be known as the parts of the cell, such as: Nucleus, ER, Golgi apparatus, etc. There are there domains that exist: Bacteria, Archaea and Eukarya(Biology Department,2015) Archaea and Bacteria look very similar under the microscope and therefore it’s very hard to differentiate them. Therefore both…

Alchemists used to obsess over chrysopoeia, the transmutation of regular metals, such as copper, into gold. However, they were not aware at the time that copper and gold were two different atomic elements and instead believed them to be compounds. Thinking these metals could be changed chemically or physically in labs, alchemists pursued this dream to no advantage. Although it is not possible to change ordinary metals to gold through chemical reactions, physical reactions, radioactive decay, or…

When an organism is in an aquatic environment, they are required to maintain their homeostasis from the difference in salt and other particles in solution and in their cell bodies. The salinity and osmolality in an environment triggers a series of regulatory responses in the organism to maintain equilibrium. The equilibrium is essential to its cell’s life and ultimately the life of the organism. The response to maintain such equilibrium is an osmotic regulation, the regulation of the solutes in…

Eukaryotic cells are cells whose nucleus is bound by a membrane; these cells contain organelles, which are structures each enclosed within its own membrane found only in eukaryotic cells, each organelle has a specific function inside a cell. One type of organelle is a lysosome, which are the organelles that dispose of waste and toxins. Lysosomes are fluid filled sacks which range in size from 0.1 to 1.2 micrometres and contain around fifty degradative enzymes that enable it to effectively…