ᴅᴇꜰɪɴᴇ ᴀᴄᴛɪᴠᴇ ᴛʀᴀɴꜱᴘᴏʀᴛ
ᴅᴇꜰɪɴᴇ ᴏꜱᴍᴏꜱɪꜱ
ᴅᴇꜰɪɴᴇ ᴅɪꜰꜰᴜꜱɪᴏɴ
Answers
✨Question 1:-
Define Active transport.
Answer:-
Active transport is the process of moving molecules across a cellular membrane through the use of cellular energy.
Active transport is used by cells to accumulate needed molecules such as glucose and amino acids. Active transport powered by adenosine triphosphate (ATP) is known as primary active transport. Transport that uses an electrochemical gradient is called secondary transport.
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★Working mechanism of Active transport
Transmembrane proteins are proteins that cross a cell membrane. They usually have one or more transmembrane domains that cross through the membrane lipid bilayer, as well as domains that bind with ligands inside and outside of the membrane. The protein recognizes the molecule or ion to be transported and passes it through its transmembrane domain.
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✨Question 2.
Define Osmosis.
Answer:-
Osmosis is a process by which the molecules of a solvent pàss from a solution of low concentration to a solution of high concentration through a semi-permeable membrane.
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★There are three different types of solutions:
1. Isotonic Solution
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2. Hypertonic Solution
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3. Hypotonic Solution
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†An isotonic solution is one that has the same concentration of solutes both inside and outside the cell.
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†A hypertonic solution is one that has a higher solute concentration outside the cell than inside.
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†A hypotonic solution is the one that has a higher solute concentration inside the cell than outside.
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✨Question 3.
Define Diffusion
Answer:-
Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration down the concentration gradient.
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★There are mainly two types of Diffusion
1. Simple Diffusion: A process in which the substance moves through a semipermeable membrane or in a solution without any help from transport proteins. For example, bacteria deliver small nutrients, water and oxygen into the cytoplasm through simple diffusion.
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2. Facilitated Diffusion: Facilitated diffusion is a passive movement of molecules across the cell membrane from the region of higher concentration to the region of lower concentration by means of a carrier molecule.
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