An essay about cycles in biology
An essay about cycles in biology.
Jessie Dean
Biological cycles are vital in many aspects of life on earth. From cycles within the body that keep organisms alive such as the cell cycle, Krebs cycle and the Calvin cycle to cycles that encompass many aspects of life and our planet such as the Nitrogen and Carbon cycles.
The cell cycle involves actively dividing eukaryotic cells passing through a series of stages known collectively as the cell cycle. The two gap phases (G1 and G2) and S (for synthesis) phase, in which the genetic material is duplicated and an M phase, in which mitosis partitions the genetic material and the cell divides, make up the cell cycle. In G1 cellular content is duplicated accept chromosomes. In S phase, each of the 46 chromosomes is duplicated by the cell. G2 double checks this looking to make some repairs if necessary. Mitosis is the process where by sister chromatids are split up to form two different cells. Once this has happened the whole process is free to start over making it a cycle.
The Krebs cycle is a part of cellular respiration. It is a series of chemical reactions used by all aerobic organisms to generate energy. It starts with acetyl coenzyme A this is then converted into a number of carbon based sugars as various amounts of reduced NAD/FAD, ATP and CO2 are given off. Glucose which is the starting molecule of Glycolysis, gives off two acetyl coA meaning two turns of the Krebs cycle per glucose, this produces, two ATP, six NADH, two FADH two and four CO2.
Nitrogen is an essential component of DNA, RNA, and proteins, the building blocks of life. All organisms require nitrogen to live and grow. Although the majority of the air we breathe is N2, most of the nitrogen in the atmosphere is unavailable for use by organisms. This is because the strong triple bond between the N atoms in N2 molecules makes it relatively unreactive, whereas organisms need reactive nitrogen to be able to incorporate it into cells. In order for plants and
Jessie Dean
Biological cycles are vital in many aspects of life on earth. From cycles within the body that keep organisms alive such as the cell cycle, Krebs cycle and the Calvin cycle to cycles that encompass many aspects of life and our planet such as the Nitrogen and Carbon cycles.
The cell cycle involves actively dividing eukaryotic cells passing through a series of stages known collectively as the cell cycle. The two gap phases (G1 and G2) and S (for synthesis) phase, in which the genetic material is duplicated and an M phase, in which mitosis partitions the genetic material and the cell divides, make up the cell cycle. In G1 cellular content is duplicated accept chromosomes. In S phase, each of the 46 chromosomes is duplicated by the cell. G2 double checks this looking to make some repairs if necessary. Mitosis is the process where by sister chromatids are split up to form two different cells. Once this has happened the whole process is free to start over making it a cycle.
The Krebs cycle is a part of cellular respiration. It is a series of chemical reactions used by all aerobic organisms to generate energy. It starts with acetyl coenzyme A this is then converted into a number of carbon based sugars as various amounts of reduced NAD/FAD, ATP and CO2 are given off. Glucose which is the starting molecule of Glycolysis, gives off two acetyl coA meaning two turns of the Krebs cycle per glucose, this produces, two ATP, six NADH, two FADH two and four CO2.
Nitrogen is an essential component of DNA, RNA, and proteins, the building blocks of life. All organisms require nitrogen to live and grow. Although the majority of the air we breathe is N2, most of the nitrogen in the atmosphere is unavailable for use by organisms. This is because the strong triple bond between the N atoms in N2 molecules makes it relatively unreactive, whereas organisms need reactive nitrogen to be able to incorporate it into cells. In order for plants and