A Ribosome is not a membrane bound organelles
Answer:
A) Protein kinases activate enzymes by phosphorylating or adding phosphate groups to them. Protein phosphatases dephosphorylate or remove phosphate groups from enzymes, including protein kinases.
Explanation:
Protein kinases are enzymes that have the ability to modulate other enzymes (or some other proteins) by adding the phosphate group. This is known as phosphorilation process. As a result of structural change, protein can change its activity (phosphorilation usually increase the activity).
Phosphatases are enzymes with opposite function, they remove phosphate group from the protein causing different effect.
Adaptions are basically add-ons and/or updates while variations are like different types.
Answer:
The correct option is: e. molecules move across the plasma membrane against their concentration gradient
Explanation:
Active transport refers to the <u>movement of the particles or molecules from higher concentration to lower concentration, across the plasma membrane of a cell.</u> This transport requires cellular energy as the movement of the molecules is <u>against the concentration gradient</u>.
Active transport can be divided into primary and secondary active transport.
A hydrometer<span> or areometer is an instrument that measures the specific gravity (relative density) of liquids—the ratio of the density of the liquid to the density of water. A </span>hydrometer<span> is usually made of glass, and consists of a cylindrical stem and a bulb weighted with mercury or lead shot to make it float upright.</span>
