Cell Signaling(General Knowledge > General Science ) Questions and answers for exam Preparation

Question 1. What is a function of the second messenger IP3?

bind to and activate protein kinase A
activate transcription factors
convert ATP to cAMP
bind to and open ligand-gated channels

Explanation:-

Answer: Option D. -> bind to and open ligand-gated channels

Question 2. What could be the cause for a cell to undergo apoptosis?

DNA damage
Radiation
Nutrient deficiency
All of the above

Explanation:-

Answer: Option D. -> All of the above

Question 3. Apoptosis can't kill which of the following?

Cell infected with viruses
Cell with DNA damage
Cancer cells
Immune cells

Explanation:-

Answer: Option C. -> Cancer cells

Question 4. Which of the following cell organelle actively participates in animal apoptosis?

Nucleus
Mitochondria
Lysosomes
Vacuoles

Explanation:-

Answer: Option B. -> Mitochondria

Question 5. How do bacteria sense local population density?

quorum sensing
bacteria sensing
signal sensing
population sensing

Explanation:-

Answer: Option A. -> quorum sensing

Question 6. What organelle stores calcium?

smooth ER
rough ER
nucleus
mitochondrion

Explanation:-

Answer: Option A. -> smooth ER

Question 7. Which is not a signaling step?

reception
transduction
response
second messaging

Explanation:-

Answer: Option D. -> second messaging

Question 8. How many stages are there to cell conversation?

4
6
3
87

Explanation:-

Answer: Option C. -> 3

Question 9. Synaptic Signaling occurs in which type of cell?

Muscle cell
Nervous System cell
White Blood Cell
Red Blood

Explanation:-

Answer: Option B. -> Nervous System cell

Question 10. Do plant cells communicate using hormones?

yes
no

Explanation:-

Answer: Option A. -> yes