Answer:
Ligand-receptor interaction is the first interaction that triggers cell signalling.
Ligands are the hormones, drugs or neurotransmitters that specifically bind with receptors present in cell surface to initiate cell signalling. Ligand binding to the receptor is reversible. Binding of the ligand to the receptor can activate or inactivate receptor. Activation may lead to cell signalling pathways. Inside cells, there are secondary molecules which on activation starts a cascade of reactions. which in-turn regulate the function of the ligand molecule.
At first, the activated receptor relates with G proteins molecules in the cell.
before the ultimate physiological effect of the ligand on the cell's behavior is produced Therefore, the cellular signaling starts as soon as the first messenger (the ligand) binds to its receptor.
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Answer:
the third one is correct
explanation
because atomic number and proton &electron number is same . neutron number is solved as atomic mass minus atomic number ( N=atomic mass - atomic number)
Answer: The only reaction performed by chloroplast through its chlorophyll is photosyntesis. Therefore the chemical formular is below.
C02 + H20 → C6H1206 + O2+ H20.
(carbondioxide) + (Water) Chlorophyll (glucose) +(oxygen)+ (water)
and
enzymes .
This is the single reaction of the process of photosynthesis.However two interconnected reactions are involved light dependent stage and light independent stage.
The first reaction takes place in presence of sunlight, and it is called Photolysis of water.it is the spiting of water to H+, electrons and Oxygen. This is the source of oxygen seen above.
4 H20→ 4H+ + 4e- + 02.
The light independent stage; the hydrogen ion from the photolysis is transfer to the light independent stage to reduce the C02 to produce glucose.In the first equation seen above.
Since chloroplast performs photosynthesis through action of its chlorophyll, The above reaction describes the chemical formula.
B.
The cell wall of plants is made up of the middle lamella, the primary cell wall and the secondary cell wall .
<u>Cellulose</u><u> a complex carbohydrate is the major components</u>. It contains, monomers of glucose in small units linked to one another by bonds.
C
Vacuole helps in plant turgidity needed for uprightness. when filled with water provides turgor pressure increases as the cell membrane pushes against the cell wall. The resulted turgidity helps the plants to maintain resistance to external pressure and therefore resist the effects of gravity.
Plants cells has large vacuole, chloroplast and a cell wall while animal cells don't have those features.
Insulin is the correct answer.
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