Parenteral route
injecting a drug into the body, includes intradermal, SQ, IM, IV routes. Drugs given IV route produce the most rapid actions because they are given directly into the bloodstream.
The DNA that contains your genes is stored in your cells in a structure called the nucleus.
Explanation:
Percentage w/v means that weight of solute present in 100 ml of a solution. Hence, 15% w/v means that 15 gram of solute per 100 ml of solution.
Hence, for 2 L (or 2000 mL) preparation the amount of mass will be calculated as follows.

= 300 g
Thus, we can conclude that weight of Tris-HCL required is 300 g.
Answer:
Option C, the proteins in the blood, and it promotes re-absorption.
Explanation:
The colloidal proteins concentration within the blood creates a pressure known as blood colloidal osmotic pressure which restrains the movement of suspended blood proteins outside the cell membrane due to which the concentration of protein with in the blood increase and in order to lower this concentration water is absorbed by the semipermeable layer of capillary cell. Hence, it can be said that it attracts water.
Hence, option C is correct