Cell Signaling MCQ

Cell Signaling MCQ can help students evaluate their knowledge of concepts in cell functions and signaling. Answers are also given for Cell Signaling MCQ to help you remember. 

Cell Signaling MCQ

1. Which of the following signal molecule is not used for extracellular signaling?

a. Autocrine

b. Endocrine

c. Paracrine

d. Cyclic AMP

2. Identify the signalling that requires physical contact between the cells involved.

a. Paracrine signaling

b. Intracellular signaling

c. Autocrine signaling

d. Juxtacrine signaling

3. Identify signal molecule that does not interact with the cell surface receptor.

a. Insulin

b. Glucagon

c. Testosterone

d. Gastrin

4. What is the name of the largest receptor family on the cell surface?


b. Ion-channel receptor

c. Enzyme-linked receptor

d. Nuclear receptor

5. Which of the following G-proteins is involved in vision regulation?

a. Gs family

b. Gi family

c. Gq family

d. Golf

6. What is the name of monomeric G-protein family that regulates cell growth?

a. Ras

b. Rab

c. Ran

d. Rho

7. Which basic chemical signalling mechanism found in multicellular organisms?

a. Paracrine signaling

b. Autocrine signaling

c. Endocrine signaling

d. All of the above

8. Cell signaling is __________.

a. Intercellular

b. Intracellular

c. Both (a) and (b)

d. None of the above

9. Which of the following signalling processes is involved in paracrine signalling?

a. Chemical signaling

b. Synaptic transmission

c. Hormonal Communication

d. Autostimulation of cell

10. Which of the following statements about cell signalling is correct?

a. In plants, the cell signaling occurs through phytohormones

b. Cell signaling is used to study the context of human diseases

c. Cell signaling is used to study the signaling between cells of an organism

d. All of the above

11. Extracellular signaling in animals is carried out by _________.

a. Autocrine signaling

b. Endocrine signaling

c. Juxtacrine signaling

d. All of the above

12. How many types of cell signalings are there?

a. Four

b. Five

c. Seven

d. Eight

13. Which statement about paracrine messenger molecules is correct?

a. The messenger molecules are large

b. The messenger molecules are short

c. The messenger molecules are stable

d. The messenger molecules are unstable

14. Arachidonic acid is the source of which of the following messenger molecules?

a. Steroids

b. Corticoids

c. Terpenoids

d. Eicosanoids

15. How many transmembrane alpha-helices do GPCR have?

a. Two

b. Four

c. Five

d. Seven

16. Steroids are a type of biologically active organic compound derived from .

a. Hormones

d. Chemicals

c. Cholesterol

d. Carbohydrates

17. Simple nerve reflexes use which of the following signalling molecules?

a. Proteases

b. Nitric oxides

c. G proteins

d. Neurotransmitters

18. Which of the following statements about G proteins is false?

a. G proteins are involved in signal cascades

b. G proteins become activated when bound to GDP

c. Guanine nucleotides regulate G proteins

d. None of the above

19. Which of the following is a cell surface receptor?

a. Enzyme-linked receptors

b. G protein-linked receptors

c. Ion-channel linked receptors

d. All of the above

20. The hormone, also known as the ligand, is classified as_________.

a. First messenger

b. The Second messenger

c. Both (a) and (b)

d. None of the above

Answer Key

MCQ on Cell Signaling