QUESTION 1 Which one of the following processes depends on a V-type ATPase? Tran

Question

QUESTION 1

Which one of the following processes depends on a V-type ATPase?

Transport of Na+ ions across a plasma membrane

Transport of H+ ions across a lysosomal membrane

Transport of glucose across a plasma membrane

Transport of Ca2+ ions into the sarcoplasmic reticulum

1 points   

QUESTION 2

The concurrent movemement of two solutes in opposite directions across a membrane using a membrane carrier is called:

Antiport

Uniport

Diffusion

Symport

1 points   

QUESTION 3

What is the correct sequence of events during receptor tyrosine kinase (RTK) signaling?

Proteins associate with receptors

A.

Transport of Na+ ions across a plasma membrane

B.

Transport of H+ ions across a lysosomal membrane

C.

Transport of glucose across a plasma membrane

D.

Transport of Ca2+ ions into the sarcoplasmic reticulum

QUESTION 1 Which one of the following processes depends on a V-type ATPase? A. Transport of Na+ ions across a plasma membrane B. Transport of H+ ions across a lysosomal membrane C. Transport of glucose across a plasma membrane D. Transport of Ca2+ ions into the sarcoplasmic reticulum 1 points QUESTION 2 The concurrent movemement of two solutes in opposite directions across a membrane using a membrane carrier is called: A. Antiport B. Uniport C. Diffusion D. Symport 1 points QUESTION 3 What is the correct sequence of events during receptor tyrosine kinase (RTK) signaling? A. Proteins associate with receptors Receptors dimerize Receptors are phosphorylated Ligands bind to receptors Cellular response is activated B. Receptors dimerize Ligands bind to receptors Receptors are phosphorylated Proteins associate with receptors Cellular response is activated C. Receptors are phosphorylated Ligands bind to receptors Proteins associate with receptors Receptors dimerize Cellular response is activated D. Ligands bind to receptors Receptors dimerize Receptors are phosphorylated Proteins associate with receptors Cellular response is activated 1 points QUESTION 4 Which one of the following statements is TRUE regarding protein transport into the ER? A. Proteins in the cytosol are unfolded before they can be transported into the ER. B. Proteins are transported into the ER as they are being synthesized by ribosomes. C. ER transport requires the use of Importin receptors that recognize ER signal sequences. D. Only transmembrane proteins contain ER localization sequences. 1 points QUESTION 5 What is the role of cyclic AMP (cAMP) in cell signaling? A. It activates Phospholipase C. B. It activates Protein Kinase A. C. It activates transcription factors. D. It activates ligand-gated ion channels. 1 points QUESTION 6 As a result of the operation of the Na+/K+ Pump: A. three sodium ions are transported into the cell for every three potassium ions transported out of the cell B. three sodium ions are transported out of the cell for every two potassium ions transported into the cell. C. three sodium ions are transported out of the cell for every two potassium ions transported out of the cell D. three sodium ions are transported out of the cell for every three potassium ions transported into the cell. 1 points QUESTION 7 What kind of transport is shown in the image below? xid-44509807_1 A. Simple Diffusion B. Osmosis C. Active Transport D. Facillitated Diffusion 1 points QUESTION 8 Which one of the following statements G-Proteins is FALSE? A. G-Proteins are active when they are bound to ATP. B. G-Proteins can activate Adenylyl Cyclase C. G-Proteins are activated by interacting with G-Protein Coupled Receptors. D. G-Proteins can activate Phospholipase C. 1 points QUESTION 9 What is the function of the membrane protein shown below? xid-44509822_1 A. Signal transduction B. Transport C. Cell-cell recognition D. Enzymatic activity 1 points QUESTION 10 What is occuring during the depolarization phase of the action potential shown below? 0199210896.action-potential.1.jpg A. Voltage-gated potassium channels open allowing potassium ions (K+) to EXIT the cell. B. Voltage-gated sodium channels open allowing sodium ions (Na+) to ENTER the cell. C. Voltage-gated sodium channels open allowing sodium ions (Na+) to EXIT the cell. D. Voltage-gated potassium channels open allowing potassium ions (K+) to ENTER the cell. 1 points QUESTION 11 Which one of the followng is likely to result in the release of Calcium ions (Ca2+) from the endoplasmic reticulum? A. cAMP binds to ligand-gated ion channels in the ER membrane. B. IP3 binds to ligand-gated ion channels in the ER membrane. C. PIP2 binds to ligand-gated ion channels in the ER membrane. D. DAG binds to ligand-gated ion channels in the ER membrane. 1 points QUESTION 12 Which one of the following is NOT a type of local cell signaling? A. Juxtacrine Signaling B. Endocrine Signaling C. Paracrine Signaling D. Synaptic Signaling 1 points QUESTION 13 Which one of the following molecules is NOT involved in shaping membranes into vesicles? A. Rab B. Clathrin C. Adaptin D. Dynamin

Explanation / Answer

1. D

2. B

3. A

4. C

5. D

6. C

7. D

8. C

9. A

10. D

11. A

12. C

13. B

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