Cell Biology Questions Online Test 4

Cell Biology Questions Online Test 4

1. Which of the following correctly matches an organelle with its function?

• Mitochondrion . . . photosynthesis
• Nucleus . . . cellular respiration
• Ribosome . . . manufacture of lipids
• Central vacuole . . . storage

2. By which of the following can movement of materials across animal cell membranes be accomplished?
I Active transport, II Diffusion, III Pinocytosis

• I only
• II only
• I and II only
• All I, II, and III

Biochemistry Questions Online Test 4

1. The Golgi complex

• Synthesizes proteins
• Produces ATP
• Provides a pathway for transporting chemicals
• Forms glycoproteins

2. The following points about microfilaments are true except

• They form cytoskeleton with microtubules
• They provide support and shape
• They form intracellular conducting channels
• They are involved in muscle cell contraction

Cell Cycle MCQs part 4

1. In order for anaphase to begin, which of the following must occur?

• Chromatids must lose their kinetochores
• Cohesin must attach the sister chromatids to each other
• Cohesin must be cleaved enzymatically
• Kinetochores must attach to the metaphase plate.

2. Why do chromosomes coil during mitosis?

• to increase their potential energy
• to allow the chromosomes to move without becoming entangled and breaking
• to allow the chromosomes to fit within the nuclear envelope
• to allow the sister chromatids to remain attached

Cell Biology MCQs part 3

Cell Biology MCQs part 3

1. A semi permeable membrane is stretched across a chamber filled with water. The membrane is only permeable to water. 60 mg of salt is added to the left side of the chamber. Which of the following will happen?

• Water will move toward the right side
• salt will move toward the right side
• Water will move toward the left side
• salt will move toward the left side

2. Dye injected into a plant cell might be able to enter an adjacent cell through a

• Tight junction
• Microtubule
• Desmosome
• Plasmodesma

Cell Communication And Signalling MCQs Part 1

1. Which of the following is the correct order of events in signal transduction?

• Receptor -> Chemical Signal -> Target Proteins -> Intracellular Proteins ->Cell Response
• Chemical Signal -> Target Proteins-> Receptor -> Intracellular Proteins ->Cell Response
• Chemical Signal -> Receptor -> Intracellular Proteins -> Target Proteins -> Cell Response
• Chemical Signal -> Receptor -> Target Proteins -> Intracellular Proteins -> Cell Response

2. Which of the following types of chemical signals is secreted in the blood and travels long distances to its target.

• Neurotransmitters
• Cytokines
• Hormones
• Target Proteins

3. Which of the following is a characteristic of a receptor?

• Speed
• Specificity
• Saturation
• All except a

4. This type of extracellular receptor causes a transporter to open or close to allow particles through once a chemical signal binds.

• G couple Protein
• JAK Kinase
• Tyrosine Kinase
• Ligand Gated Ion Channel

5. An intracellular portion of this receptor phosphorylates intracellular Proteins.

• G coupled Protein Receptor
• Tyrosine Kinase
• Ligand Gated Ion Channel
• All of the following

6. Once Adenylyl cyclase is activated it

• Opens Ca2+ doors on the Sarcoplasmic Reticulum
• Makes cAMP
• Phosphorylates intracellular proteins
• Causes a change in membrane potential

7. IP3 does which of the following?

• Opens Ca2+ doors on the Sarcoplasmic Reticulum
• Activates target proteins
• Both a and b
• None of the above

8. An insulin receptor is an example a _____________ receptor.

• Tyrosine Kinase
• G couple Protein
• Ligand Gated Ion Channel
• JAK Kinase

9. Most cytokine receptors are an example a _____________ receptor.

• Tyrosine Kinase
• G couple Protein
• Ligand Gated Ion Channel
• JAK Kinase

10. Beta adrenergic receptors on cardiac contractile cells are an example a _____________ receptor.

• Tyrosine Kinase
• G couple Protein
• Ligand Gated Ion Channel
• JAK Kinase

Score =

Correct answers:

Cell Communication And Signalling MCQs Parts => 1..

Cell Biology MCQs part 2

1. The structure within a cell that distinguishes the cell as being eukaryotic, and prokaryotic is

• Ribosomes
• Cell membrane
• Cell wall
• Nucleus

2. Microtubules consist of helically stacked molecules of the protein

• Actin
• Myosin
• Keratin
• Tubulin

3. The microfilaments composed of

• Actin protein
• Gelatin protein
• Keratin protein
• Tubulin protein

4. Lysosomes have

• Single-layered membrane
• Double-layered membrane
• Three-layered membrane
• No membrane

5. Which of the following are regularly assembled and disassembled during cell cycle.

• Microtubules
• Intermediate filaments
• Both A and B
• None of these

6. Plant cell wall

• Provide rigidity to the cell
• Maintains cell shape
• Prevents expansion of cell
• All A, B and C

7. In which organelle following reaction takes place 6 CO₂ + 6 H₂O + energy (from sunlight) ---------> C₆H₁₂O₆+ 6 O₂

• Mitochondrion
• Peroxisome
• Chloroplast
• Glyoxysome

8. SER is abundant in cells that are involved in

• Lipid metabolism
• Protein metabolism
• Glucose metabolism
• Calcium metabolism

9. The transport vesicles from the Endoplasmic Reticulum(ER) fuse with the ____of the Golgi apparatus.

• Cis face
• Trans face
• Coated face
• Both A and B

10.The door to your house is like the __________________ of a cell membrane?

• Phospholipid bilayer
• Integral protein
• Recognition protein
• Peripheral protein

Score =

Correct answers:

Cell Biology MCQs Parts =>

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