The lac operon is an operon required for the transport and metabolism of
lactose in Escherichia coli and many other entric bacteria. It includes
the promoter, regulatory and the operator.
Answer: C. repressor gene
The United States had the highest rate of obesity in the world, because ONE THIRD of its population is obese.
Obesity is a condition that is associated with having excess accumulated body fat, which can be deleterious to one's health. An individual is considered to be obese if the person's body weight is at least 20% more than it ought to be. Scientifically, obesity has been identified as the major cause of many chronic diseases such as diabetes mellitus, cardiovascular diseases, etc.
Answer:
Cell wall
Explanation:
The cell wall is the part of the bacterial cell is most involved in gram staining. This is because the two types of gram bacteria which are known as the gram positive and gram negative bacteria have different and unique cell wall constituents.
The gram positive bacteria have a cell wall composed of peptidoglycan while the gram negative bacteria have cell wall composed of a thin layer of peptidoglycan and an outer layer of lipopolysaccharide. They give different results when stained ; gram positive bacteria retains the crystal violet color of the reagent used while the gram negative bacteria gives a pale reddish color.
The answer is pronuclei. A pronuclei is the state of the
nucleus of either the sperm or the ovum after the sperm has entered the ovum
but the two nuclei have not yet fused. When the sperm enters the ovum, the membrane
of the sperm pronuclei dissolves hence leaving no barrier for the two genetic
materials to combine.
Answer:
convex lens
Explanation:
because when parallel rays of light pass through a lens are brought together through a lens
