Answer: "Decreasing the salt concentration of the solution lowers DNA's melting point (Tm)" is not a true statement
Explanation:
Increasing salt concentration would lower the DNA's melting point (Tm), not otherwise.
For instance:
- In 8M urea (8M means 8 Moles per dm3), Tm is decreased by nearly 20°C.
- 95% formamide at room temperature would completely denature the double stranded DNA.
Thus, higher concentration of salts like urea or formamide lowers Tm, not otherwise
Answer:
The bacteria are activated through exposure to acids in the gut of the Dermacentor tick. The bacteria are activated after the tick feeds on a host for several hours. The bacteria are activated when the tick reaches its adult stage.
Explanation:
Answer:
its a universal solvent for polar substances(charged or ionisable substances). which implies that water can dissolve a variety of solutes as it is polar and most solutes are polar.
Vagina
Is a hollow, muscular passage leading from the uterus to the outside of the body; sperm enter a female's body through the vagina; during childbirth, the baby passes out of the mother's body through the vagina which is also known as birth canal
Answer:
The correct answer will be option-A
Explanation:
The transport of the molecules between cells and a cell and its surrounding is very important to survive.
A cell has evolved two ways to transport the molecules which are passive and active movement or transport.
The passive movement is the movement of the molecules across the membrane depending on the concentration gradient without using any source of energy which is utilized in active transport.
In the given question, osmosis is the process which can be considered passive movement as it transports the water down the concentration gradient without using any source of water.
Thus, osmosis is the correct answer.