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Home ‣ Biochemistry ‣ Cell Signalling and Transduction Comments
- Question
Which of the following statement is correct?
Options- A. Cell communicate with one another in multicellular organisms using extracellular signaling molecules or hormones
- B. Cell communicate with one another in unicellular organisms using extracellular signaling antigen and antibody
- C. Cell communicate with one another in multicellular organisms using intracellular signaling molecules only
- D. Cell communicate with one another in unicellular organisms using intracellular signaling antigen and antibody
- Correct Answer
- Cell communicate with one another in multicellular organisms using extracellular signaling molecules or hormones
- 1. Which of the following comes under the category of cell surface receptor?
Options- A. Enzyme linked receptors
- B. Ion-channel linked receptors
- C. G protein linked receptors
- D. All of these Discuss
- 2. Small charged molecules, often biogenic amines function as
Options- A. hormones
- B. neurotransmitters
- C. both (a) and (b)
- D. none of these Discuss
- 3. Which of the following is a hormone whose action requires a cell surface receptor?
Options- A. Nitric oxide
- B. Progesterone
- C. Adrenaline
- D. Growth factors Discuss
- 4. In the signal transduction mechanism known as protein phosphorylation
Options- A. the signaling molecule binds to a surface receptor
- B. receptor kinases play a key role in triggering the signal cascade
- C. phosphorylated proteins act with enzymes to trigger the signal cascade
- D. All of the above Discuss
- 5. The signaling molecules called steroid hormones
Options- A. are made in one location of the body but have their effects some distance away
- B. are hydrophilic and so cannot penetrate the plasma membrane
- C. bind to cell surface receptors to trigger chemical cascades
- D. never enter the blood of humans Discuss
- 6. In vasodilation, proper nerve signals sent to blood vessels cause
Options- A. the release of nitric oxide from endothelial cells
- B. relaxation of smooth muscle cells
- C. reduced blood pressure
- D. All of the above Discuss
- 7. In terms of cell communication, what do bacterial pathogens such as cholera and anthrax have in common?
Options- A. They destroy the receptors for key signaling molecules
- B. They prevent the production of key signaling molecules
- C. They alter the chemical structure of key signaling molecules
- D. They block the normal functioning of signal transduction mechanisms Discuss
- 8. Two key organizing principles for large multicellular organisms are
Options- A. prokaryotic cell structure and cell specialization
- B. cell specialization and communication between cells
- C. communication between cells and simple nerve reflexes
- D. simple nerve reflexes and cell specialization Discuss
- 9. Messelsen and Stahl model of replication was called
Options- A. conservative replication
- B. semi-conservative replication
- C. dispersive replication
- D. Cri du Chat Discuss
- 10. Enzymes, responsible for unraveling short segments of DNA is
Options- A. DNA polymerase
- B. helicase
- C. DNA ligase
- D. primase Discuss
Cell Signalling and Transduction problems
Search Results
Correct Answer: All of these
Correct Answer: both (a) and (b)
Correct Answer: Adrenaline
Correct Answer: All of the above
Correct Answer: are made in one location of the body but have their effects some distance away
Correct Answer: All of the above
Correct Answer: They block the normal functioning of signal transduction mechanisms
Correct Answer: cell specialization and communication between cells
Correct Answer: semi-conservative replication
Correct Answer: helicase
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