<h2>✿━━━━@♥ℳg━━━━✿</h2><h2 /><h2>
</h2><h2>______________________________</h2><h2 /><h2>✿━━━━@♥ℳg━━━━✿</h2><h2 /><h2>Nuclear membrane</h2>
The nucleus is enclosed by a double layered cellular membrane called the nuclear membrane.
<h2>Nucleoplasm</h2>
The nucleus contains a nuclear sap, enclosed by the nuclear envelope, which is known as the nucleoplasm. This holds the nucleoli and suspends the chromatins.
<h2>Nucleolus</h2>
The nucleolus is a sub-organelle present inside the nucleus. It can be observed as a dark spot under the microscope.
Nucleoli are made up of proteins, ribosomal RNA (rRNA), and ribosomal DNA (rDNA).
<h2>Chromatin network</h2>
DNA gets associated with protein molecules to form chromatins.
Chromatins are present in the nucleoplasm.
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.
hope this helps
The correct option is B.
Harry Harlow was an American psychologist, who through his study proof that children need love and affection to develop normally. He demonstrated this by using rhesus monkey babies, who are taken away from their mothers immediately after birth. In place of their real mother, Harry provided two surrogate mothers instead and allow the monkey to chose any one they prefer. The first surrogate mother was made of wire and monkeys can get food from her while the second surrogate mother was made of soft terry cloth but the monkey can not get any food from her. Harry observed that the monkeys prefer to stay with their terry cloth mother, which provide comfort and security than with the one made of wire. The monkeys only go to the wire mother when they are hungry.
