Essential Cell Biology, 6th Edition
by Bruce Alberts
Complete Chapter Test Bank are
included (Ch 1 to 20)
** Immediate Download
** Swift Response
** All Chapters included
,Table of Contents are given below
1. Cells: The Fundamental Units of Life
2. Chemical Components of Cells
3. Energy, Catalysis, and Biosynthesis
4. Protein Structure and Function
5. DNA and Chromosomes
6. DNA Replication and Repair
7. From DNA to Protein: How Cells Read the Genome
8. Control of Gene Expression
9. How Genes and Genomes Evolve
10. Analyzing the Structure and Function of Genes
11. Membrane Structure
12. Transport Across Cell Membranes
13. How Cells Obtain Energy from Food
14. Energy Generation in Mitochondria and Chloroplasts
15. Intracellular Compartments and Protein Transport
16. Cell Signaling
17. Cytoskeleton
18. The Cell Cycle
19. Sexual Reproduction and Genetics
20. Cell Communities: Tissues, Stem Cells, and Cancer
,The test bank is organized in reverse order, with the last chapter displayed first, to
ensure that all chapters are included in this document. (Complete Chapters included
Ch20-1)
Chapter 20
1. Both multicellular plants and animals have
a. cells capable of locomotion.
b. cells with cell walls.
c. a cytoskeleton composed of actin filaments, microtubules, and intermediate
filaments.
d. tissues composed of multiple different cell types.
2. Which of the following statements about plant cell walls is true?
a. The microtubule cytoskeleton directs the orientation in which cellulose is
deposited in the cell wall.
b. The molecular components of the cell wall are the same in all plant tissues.
c. Because plant cell walls are rigid, they are not deposited until the cell has
stopped growing.
d. The cellulose found in cell walls is produced as a precursor molecule in the
cell and delivered to the extracellular space by exocytosis.
3. Which of the following molecules is NOT found in plants?
a. cellulose
b. lignin
c. collagen
d. pectin
4. Which of the following statements about cellulose is FALSE?
a. Cellulose synthase enzyme complexes are integral membrane proteins.
b. An array of microtubules guides the cellulose synthase complex as it
moves in the membrane.
c. The sugar monomers necessary for the synthesis of a cellulose polymer
are transported across the plasma membrane.
d. Microtubules are directly attached to the outside surface of the plasma
, membrane to form tracks that help orient the cellulose polymers.
5. A major distinction between the connective tissues in an animal and other main
tissue types such as epithelium, nervous tissue, or muscle is the
a. ability of connective-tissue cells such as fibroblasts to change shape.
b. amount of extracellular matrix in connective tissues.
c. ability of connective tissues to withstand mechanical stresses.
d. numerous connections that connective-tissue cells make with each other.
6. Which of the following is NOT an example of a connective tissue?
a. bone
b. the layer of photoreceptors in the eye
c. the jellylike interior of an eye
d. cartilage
7. Which of the following statements about animal connective tissues is true?
a. Enzymes embedded in the plasma membrane synthesize the collagen in
the extracellular matrix extracellularly.
b. In connective tissue, the intermediate filaments within the cells are
important for carrying the mechanical load.
c. Cells can attach to a collagen matrix by using fibronectin, an integral
membrane protein.
d. Proteoglycans can resist compression in the extracellular matrix.
8. Which of the following statements about collagen is FALSE?
a. Collagen synthase organizes the mature collagen molecules into ordered
collagen fibrils.
b. Collagen is synthesized as procollagen and secreted to the outside of the
cell in a secretory vesicle.
c. The terminal procollagen domains are cleaved by a protease in the
extracellular space.
d. Cells can break down a collagen matrix using matrix proteases.