Table of contents

1. Overview of Cell Biology2h 49m
2. Chemical Components of Cells1h 14m
3. Energy1h 33m
4. DNA, Chromosomes, and Genomes2h 31m
5. DNA to RNA to Protein2h 31m
6. Proteins1h 36m
7. Gene Expression1h 42m
8. Membrane Structure1h 4m
- The Lipid Bilayer
  38m
- Membrane Proteins
  25m
9. Transport Across Membranes1h 52m
10. Anerobic Respiration1h 5m
11. Aerobic Respiration1h 11m
12. Photosynthesis52m
13. Intracellular Protein Transport2h 18m
14. Cell Signaling1h 28m
15. Cytoskeleton and Cell Movement1h 39m
16. Cell Division3h 5m
17. Meiosis and Sexual Reproduction50m
18. Cell Junctions and Tissues48m
19. Stem Cells13m
- Stem Cells
  13m
20. Cancer44m
21. The Immune System1h 6m
22. Techniques in Cell Biology1h 41m

1. Overview of Cell Biology

Overview of Tissue Structures

Cell Biology

1. Overview of Cell Biology

Overview of Tissue Structures

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Multiple Choice

Look at the cell in the figure. Based on this figure, which of the following statements is true?

The cell is surrounded by a thick cell wall composed primarily of cellulose.

The cell lacks any specialized structures for cell-to-cell communication.

The cell's plasma membrane is folded into microvilli to increase its motility.

The cell contains tight junctions that help prevent the passage of molecules between adjacent cells.

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Verified step by step guidance

Step 1: Begin by identifying the type of cell shown in the figure. Determine whether it is a plant cell, animal cell, or another type of eukaryotic cell based on visible structures such as a cell wall, chloroplasts, or other organelles.

Step 2: Evaluate the first statement: 'The cell is surrounded by a thick cell wall composed primarily of cellulose.' Recall that cellulose-based cell walls are characteristic of plant cells. Check the figure for the presence of a cell wall to confirm or refute this statement.

Step 3: Evaluate the second statement: 'The cell lacks any specialized structures for cell-to-cell communication.' Specialized structures for communication, such as plasmodesmata in plant cells or gap junctions in animal cells, should be visible in the figure. Determine if such structures are present or absent.

Step 4: Evaluate the third statement: 'The cell's plasma membrane is folded into microvilli to increase its motility.' Microvilli are extensions of the plasma membrane that increase surface area for absorption, not motility. Check the figure for microvilli and assess their function in the context of the cell type.

Step 5: Evaluate the fourth statement: 'The cell contains tight junctions that help prevent the passage of molecules between adjacent cells.' Tight junctions are characteristic of animal cells, particularly in epithelial tissues. Look for evidence of tight junctions in the figure and determine if this statement is consistent with the observed structures.