Cell Communication And Signaling Quiz

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| By Catherine Halcomb

Catherine Halcomb

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Quizzes Created: 1384 | Total Attempts: 6,198,065

Questions: 10 | Attempts: 2,112 | Updated: Mar 22, 2023

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Cell Communication And Signaling Quiz - Quiz

Play this advanced level cell communication and signaling quiz and evaluate your knowledge in biology. Cell signaling or cell communication allows cells to receive, process, and transmit signals between them and with their environment. You might have heard about this topic in your biology textbooks. If you still remember this terminology, give this quiz a try and revise the same. Do you think you can score good marks on this test? Check it out. Good luck, buddy!

Questions and Answers

1.

Which of the following domain is not found in the structure of nuclear receptors?
- A.
  
  Hinge domain
- B.
  
  C-terminal domain
- C.
  
  DNA binding domain
- D.
  
  F-domain
Correct Answer
D. F-domain

Explanation
The F-domain is not found in the structure of nuclear receptors. Nuclear receptors are transcription factors that regulate gene expression. They typically consist of several domains, including the DNA binding domain, hinge domain, and C-terminal domain. However, the F-domain is not a recognized domain in nuclear receptors.

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1
0
2.

What are the three stages of cell signalling?
- A.
  
  Reception
- B.
  
  Transduction
- C.
  
  Transcription
- D.
  
  Response
- E.
  
  Translation
Correct Answer(s)
A. Reception
B. Transduction
D. Response

Explanation
Cell signaling is a complex process that involves communication between cells. The three stages of cell signaling are reception, transduction, and response. Reception occurs when a signaling molecule binds to a receptor protein on the cell surface, triggering a response. Transduction is the process by which the signal is converted into a cellular response through a series of molecular events. Finally, the response is the specific action or change that occurs in the cell as a result of the signaling pathway.

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3
0
3.

Which of the following is an example of a second messenger?
- A.
  
  CAMP
- B.
  
  GTP
- C.
  
  Epinephrine
- D.
  
  Insulin
Correct Answer
A. CAMP

Explanation
cAMP (cyclic adenosine monophosphate) is an example of a second messenger. Second messengers are molecules that transmit signals from the cell surface to the interior of the cell, amplifying the signal and initiating a cellular response. cAMP is commonly used in signal transduction pathways, where it is produced in response to extracellular signals and regulates various cellular processes such as metabolism, gene expression, and cell growth. It acts as a secondary messenger by activating protein kinase A (PKA) and other downstream effectors, ultimately leading to the desired cellular response.

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4.

What are receptors?
- A.
  
  Catalyst
- B.
  
  Enzymes
- C.
  
  Acid
- D.
  
  Proteins
Correct Answer
D. Proteins

Explanation
Receptors are proteins that are located on the surface of cells or inside cells. They play a crucial role in cell signaling by binding to specific molecules, such as hormones or neurotransmitters, and initiating a cellular response. Receptors are responsible for transmitting signals from the outside environment to the inside of the cell, allowing cells to respond and adapt to their surroundings.

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5.

Which signaling molecules do simple nerve reflexes use?
- A.
  
  G Proteins
- B.
  
  Nitric oxides
- C.
  
  Neurotransmitters
- D.
  
  None of the above
Correct Answer
C. Neurotransmitters

Explanation
Simple nerve reflexes use neurotransmitters as signaling molecules. Neurotransmitters are chemicals that are released by neurons and are responsible for transmitting signals between nerve cells. They play a crucial role in the communication and coordination of the nervous system. When a nerve impulse reaches the end of a neuron, neurotransmitters are released into the synapse, or the small gap between neurons, where they bind to receptors on the next neuron, transmitting the signal and allowing for the relay of information. G proteins and nitric oxides are not typically involved in simple nerve reflexes.

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6.

Which one is not a type of signaling molecule?
- A.
  
  Thyroxin
- B.
  
  Testosterone
- C.
  
  Insulin
- D.
  
  Adenylate cyclase
Correct Answer
D. Adenylate cyclase

Explanation
Adenylate cyclase is not a type of signaling molecule. It is an enzyme that catalyzes the conversion of ATP to cyclic AMP (cAMP), which is a second messenger involved in intracellular signaling pathways. Thyroxin, testosterone, and insulin are all examples of signaling molecules that play important roles in various physiological processes.

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7.

Which is not the extracellular signalling molcule?
- A.
  
  Hormones
- B.
  
  Neurotransmitters
- C.
  
  Cytokines
- D.
  
  Serine kinases
Correct Answer
D. Serine kinases

Explanation
Serine kinases are not considered extracellular signaling molecules because they are intracellular enzymes that phosphorylate serine residues on target proteins. In contrast, hormones, neurotransmitters, and cytokines are all examples of extracellular signaling molecules that transmit signals between cells or tissues.

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8.

Which is the highly conserved domain in the structure of nuclear receptors?
- A.
  
  DNA binding domain
- B.
  
  Ligand binding domain
- C.
  
  N terminal regulatory domain
- D.
  
  C-terminal domain
Correct Answer
A. DNA binding domain

Explanation
The highly conserved domain in the structure of nuclear receptors is the DNA binding domain. This domain is responsible for binding to specific DNA sequences known as hormone response elements (HREs) in the promoter regions of target genes. It allows the nuclear receptor to directly interact with DNA and regulate gene expression. The DNA binding domain is essential for the receptor's function as a transcription factor and is found in all nuclear receptors, making it highly conserved across different receptor subfamilies.

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2
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9.

Which is not the function of the G-protein coupled receptor?
- A.
  
  Glycogen synthesis and breakdown
- B.
  
  Regulates muscle contraction.
- C.
  
  Inhibits aggregation of blood platelets
- D.
  
  Doesn’t inhibit segregation of blood platelets
Correct Answer
D. Doesn’t inhibit segregation of blood platelets

Explanation
The G-protein coupled receptor is involved in various cellular functions, including regulating muscle contraction, inhibiting the aggregation of blood platelets, and glycogen synthesis and breakdown. However, it does not have a function in inhibiting the segregation of blood platelets.

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10.

Which is not the receptor of tyrosine kinase?
- A.
  
  PDGF
- B.
  
  Prolactin
- C.
  
  EGF-1
- D.
  
  FGF
Correct Answer
B. Prolactin

Explanation
Prolactin is not a receptor of tyrosine kinase. Tyrosine kinase receptors are a type of cell surface receptor that have an enzyme activity called tyrosine kinase, which adds a phosphate group to tyrosine residues in proteins. PDGF, EGF-1, and FGF are all known to be receptors of tyrosine kinase. However, prolactin does not possess tyrosine kinase activity and therefore cannot function as a receptor for this signaling pathway.

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1

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Current Version
Mar 22, 2023

Quiz Edited by
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Mar 02, 2022

Quiz Created by
Catherine Halcomb

Cell Communication And Signaling Quiz

Which of the following domain is not found in the structure of nuclear receptors?

What are the three stages of cell signalling?

Which of the following is an example of a second messenger?

What are receptors?

Which signaling molecules do simple nerve reflexes use?

Which one is not a type of signaling molecule?

Which is not the extracellular signalling molcule?

Which is the highly conserved domain in the structure of nuclear receptors?

Which is not the function of the G-protein coupled receptor?

Which is not the receptor of tyrosine kinase?