Answer: Option B
Explanation:
The bacteria and viruses in the class that is being released from classmates ans instructor is enough to cause disease but it is killed before it causes disease in the body.
This is so because the human body has immune system that consists of various mechanism that helps in killing the harmful pathogens.
The microbes present in the air is inhaled and the mucous membrane in the nasal passage swallow the pathogens and they are killed in the acidic environment.
The environment inside the stomach is highly acidic which does not allows the sustainability of the pathogen inside the body.
Answer:
Mitochondrial DNA is the small circular chromosome found inside mitochondria. The mitochondria are organelles found in cells that are the sites of energy production. The mitochondria, and thus mitochondrial DNA, are passed from mother to offspring.
Its the color of crystals formed depends on the speed of evaporation
You would have .3 of a chromosome for each new cell
Answer: Option C
Explanation:
Phenylketonuria is a rare genetic disorder in which an amino acid known as phenylalanine to build up inside the body.
PKU is a disorder in which the there is a defect in the gene which helps in create the enzyme needed to breakdown the phenylalanine.
The level of phenylalanine in the individuals before birth is normal but after birth the concentration of the amino acid phenylalanine is abnormally high because the enzyme is not synthesized in the body that is responsible for its breakdown.