It is the cell nucleus.
The nucleus coordinates the cell's activities which include growth, intermediary metabolism, protein synthesis, and reproduction (cell division).
It regulates activities of the following organelles in the cell.
(1) Endoplasmic reticulum which synthesizes carbohydrates and lipids.
(2) Golgi apparatus which manufactures , stores and ships certain cellular products.
(3) Lysosomes which digest cellular macromolecules
(4) Mitochondria which provide energy for the cell.
(5) Peroxisomes which detoxify alcohol, form bile acid and use oxygen to break down fats.
In the epiphyseal plate, the microscopic zone in which chondrocytes undergo rapid cell division and become aligned into longitudinal columns of flattened lacunae is called the: <u>zone of proliferating cartilage</u>.
Longitudinal growth of long bones is carried out by the endochondral ossification process.
This process consists of the proliferation, hypertrophy and apoptosis of chondrocytes with vascular invasion and mineralization of the cartilaginous matrix.
In the epiphyseal plate, the proliferation cartilage zone is contiguous with the reserve cartilage zone in the direction of the diaphysis.
In this area the chondrocytes undergo mitosis, forming axial isogenic groups and organizing themselves in well-defined longitudinal columns.
As a consequence of this active mitosis, the layer thickens and the entire plaque grows longitudinally.
In this microscopic zone, cells are larger than the reserve zone and actively synthesize collagen (type II and XI) and other cartilaginous matrix proteins.
Therefore, we can conclude that the zone of proliferating cartilage is where chondrocytes undergo rapid cell division and become aligned into longitudinal columns of flattened lacunae.
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The discovery of populations in which the phenotype of the recessive allele help a population survive
The correct answer is option C
The frequency of the homozygous recessive genotype
In the Hardy-Weinberg equation, p is the frequency of the dominant allele, and q is the frequency of recessive allele then the frequency of genotype is represented by
p^2 = p x p = frequency of the homozygous dominant genotype ( AA)
q^2 = q x q = frequency of the homozygous dominant genotype (aa)
2 pq = p x q = The frequency of the heterozygous dominant genotype ( Aa)
Approximately
36 kcal. One gram of pure lipid contains about 9 kcal of energy, more than
twice that of carbohydrate. Regarding the metabolic regulation of glycolysis.
High amounts of ATP (and low ADP and Pi) would slow down PFK enzyme activity.