Answer:
EtBr inserts between the stacked bases in the DNA double helix.
Explanation:
- EtBr is used for visualizing DNA bands as it fluoresces under the UV illumination.
- EtBr is an aromatic compound that is capable of inserting itself between the stacked bases of the DNA double helix.
- The hydrophobic environment around the base pairs where the EtBr intercalates is responsible for the fluorescence. As the EtBr molecule intercalates between these base pairs the cation of EtBr sheds the water molecules associated with it and this causes it to fluoresce under UV light as water is a quencher of fluorescence.
Answer: The particles that can pass through the cell membrane are the GREEN SOLVENT PARTICLES.
Explanation:
OSMOSIS can be defined as the thermal movement of solvent (water molecules) through a selectively permeable or semi-permeable membrane from a region of high concentration of the solvent to one where they are in low concentration.
The cell is bound by a membrane called plasma membrane. This membrane is selectively permeable and allows water and certain dissolved solvents to pass through it. As a result, the plasma membrane of the cell regulates the movement of materials between the cell and it's environment.
From the osmosis gizmo, it portrays a typical example of osmotic reaction occuring between a cell immersed in a solution of purple solute particles dissolved in green solvent particles. In order to maintain an osmotic balance between the cell and the solution surrounding it, the solvent (which is the green solvent particles) will move from the region of higher concentration to a lower region through the cell membrane
Answer:
The correct answer will be option-A
Explanation:
The pituitary gland is the small endocrine organ which secretes hormones which control major function of the body. Hyperpituitarism is the condition caused when the pituitary gland starts overproducing the hormones than required.
In the given question, the person has the bulged forehead, large feet and legs and the headaches which are the symptoms shown by the body due to the overproduction of the growth hormone produced by the pituitary gland as it secretes growth hormone causing gigantism.
Thus, option-A is the correct answer.
A tanned skin because if it was a cold cloudy environment she would be more fair