Cell Signaling HW Quiz : Mar 21 at 6:41am z Instructions llowing quiz serves as

Question

Cell Signaling HW Quiz : Mar 21 at 6:41am z Instructions llowing quiz serves as a review of the cell signaling section and is a preview of the types of questions that m r on the upcoming midterm exam. It is open book/open notes and you are free to work in groups if you wan Question 1 1 pts When a signal needs to be sent to most cells throughout a multicellular organism, the signal most suited for this is a neurotransmitter O a hormone O a paracrine signal O a second messenger Notch Question 2 1 pts

Explanation / Answer

3] Option no. 4 -- Different cell types might possess different genes that control different responses.

Reason-- All the cells of a particular organism contain the same number and type of chromosomes with the same genetic make up. Hormones act on only target cells or organs.

4] Option no. 4-- Interact with the signal molecules and diffuse through the plasma membrane.

  

Reason -- All steroid hormones are synthesised from cholesterol and since they are fat soluble, they diffuse easily through the plasma membrane.

5] Option no. 5-- Ras monomeric GTPase gets activated

Reason - Rho GTPase gets activated.

7] Option no. 4-- Different GPCRs can be found in plasma membranes, the cytosol or the nucleus ,depending on the solubility or size of their ligand.

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