Questions Related to atp
Choose the correct answer from the alternatives given.
If a cell is placed in an isotonic solution, what will occur?
So, the correct answer is 'None of the above will occur'.
During phloem transportation sugar is moved in form of sucrose in to the companion cells and them into the living phloem sieve tube cells by -
Pholem is the food-conducting tissue.
A root concentrates minerals by?
Percentage of water left in the soil when a plant begins to wilt is known as
Water held tightly by soil particles around them is called as hygroscopic water. It is held in a very thin film and is not available to plants. Plants are able to absorb capillary water, which is present in the capillary spaces between soil particles. Run away water is also not available to plants.
Absorption of mineral elements from the soil occurs through
Absorption of mineral elements from the soil involves active transport by the cells. Minerals may also be absorbed as ions rather than salts.
In trees, death of protoplasts is essential for vital function such as
Water transport is a physical process and not a physiological process. It does not require living cells and protoplasm. The driving force is the transpiration pull generated by loss of water through leaves. This is the reason why xylem tracheids and vessels are dead on maturity. Food transport is a physiological process and requires living cells similarly stomatal movement also is a physiological process and requires living cells.
Nobel prize in 1991 for discovering the single ion channels in cell was awarded to
In 1991, the Nobel prize in medicine or physiology was given to Erwin Neher and Bert Sarkmann for the discovery of single ion channels in cells. They were able to develop a technique that registers very minute variations in electric currents that passes through a single ion channel. This new method helped them to watch the activity of a single molecule.
The process by which minerals get absorbed is
The minerals are mainly absorbed by roots which are in direct contact with the soil. Absorption of water is known as water uptake. Short distance transport of water takes place from cell to cell across the membranes involving physical processes such as diffusion, osmosis and water potential differences. Long distance transport involves complex processes such as root pressure and transpiration pull. transport There are two processes by which mineral absorption takes place:
Which statement is incorrect for ion-channels?
Ion channels are special proteins through which ions flow along the concentration gradient. These channels are important, because the membrane is made up of bilayer of lipids and will not allow transport of water soluble ions. However lipid soluble components can dissolve in membrane lipids and can be transported across the membrane without special carrier or transport proteins.
But all ions cannot pass through same transport protein because volume of each ion will be different. There are different transport proteins for transport of different ions.
ATP is required for