Discussion
Home ‣ Biochemistry ‣ Cell Signalling and Transduction Comments
- Question
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
- Correct Answer
- They block the normal functioning of signal transduction mechanisms
- 1. 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
- 2. 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 Discuss
- 3. 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
- 4. Small charged molecules, often biogenic amines function as
Options- A. hormones
- B. neurotransmitters
- C. both (a) and (b)
- D. none of these Discuss
- 5. 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
- 6. 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
- 7. Messelsen and Stahl model of replication was called
Options- A. conservative replication
- B. semi-conservative replication
- C. dispersive replication
- D. Cri du Chat Discuss
- 8. Enzymes, responsible for unraveling short segments of DNA is
Options- A. DNA polymerase
- B. helicase
- C. DNA ligase
- D. primase Discuss
- 9. In the study of one experiment it was found that the value of Tm for DNA is = 40° C. If the cell has 20% GC at the above Tm, then what will be value of 'Tm' if the GC% increases to 60%?
Options- A. Remains same
- B. Increases
- C. Decreases
- D. Can not be compared Discuss
- 10. The higher order structure of DNA shows symmetry, whereas the higher order structures of most proteins do not. Why isn't protein shape more regular like DNA?
Options- A. DNA has one main function in cells whereas proteins have many.
- B. The many different amino acid R groups on proteins confer many different shapes.
- C. Some S amino acids cause proteins to bend; others cause protein to flatten.
- D. All of the above Discuss
Cell Signalling and Transduction problems
Search Results
Correct Answer: All of the above
Correct Answer: Cell communicate with one another in multicellular organisms using extracellular signaling molecules or hormones
Correct Answer: All of these
Correct Answer: both (a) and (b)
Correct Answer: Adrenaline
Correct Answer: cell specialization and communication between cells
Correct Answer: semi-conservative replication
Correct Answer: helicase
Correct Answer: Increases
Correct Answer: All of the above
Comments
There are no comments.More in Biochemistry:
Programming
Copyright ©CuriousTab. All rights reserved.