All Chapters
Ch.1 - Introduction to Biology
Ch.2 - Chemistry
Ch.3 - Water
Ch.4 - Carbon
Ch.5 - Biological Molecules
Ch.6 - Cells
Ch.7 - The Membrane
Ch.8 - Energy and Metabolism
Ch.9 - Respiration
Ch.10 - Photosynthesis
Ch.11 - Cell Signaling
Ch.12 - Cell Division
Ch.13 - Meiosis
Ch.14 - Mendelian Genetics
Ch.15 - Chromosomal Theory of Inheritance
Ch.16 - DNA Synthesis
Ch.17 - Gene Expression
Ch.18 - Regulation of Expression
Ch.19 - Viruses
Ch.20 - Biotechnology
Ch.21 - Genomics
Ch.22 - Development
Ch.23 - Evolution by Natural Selection
Ch.24 - Evolution of Populations
Ch.25 - Speciation
Ch.26 - History of Life on Earth
Ch.27 - Phylogeny
Ch.28 - Prokaryotes
Ch.29 - Protists
Ch.30 - Plants
Ch.31 - Fungi
Ch.32 - Overview of Animals
Ch.33 - Invertebrates
Ch.34 - Vertebrates
Ch.35 - Plant Anatomy
Ch.36 - Vascular Plant Transport
Ch.37 - Soil
Ch.38 - Plant Reproduction
Ch.39 - Plant Sensation and Response
Ch.40 - Animal Form and Function
Ch.41 - Digestive System
Ch.42 - Circulatory System
Ch.43 - Immune System
Ch.44 - Osmoregulation and Excretion
Ch.45 - Endocrine System
Ch.46 - Animal Reproduction
Ch.47 - Nervous System
Ch.48 - Sensory Systems
Ch.49 - Muscle Systems
Ch.50 - Ecology
Ch.51 - Animal Behavior
Ch.52 - Population Ecology
Ch.53 - Community Ecology
Ch.54 - Ecosystems
Ch.55 - Conservation Biology
Sections
Cells
Nucleus
Endomembrane System
Endosymbionts
Cytoskeleton
Cell Junctions

Concept #1: Intermediate Filaments

Concept #2: Microtubules and Motor Proteins

Concept #3: Cilia and Flagella

Concept #4: Microfilaments

Practice: Cytoskeleton functions include all of the following EXCEPT:

Practice: The cytoskeleton is a static structure, once built it doesn’t change.

Practice: What component of the cytoskeletons do motor proteins use to transport vesicles?

Practice: Bacteria have flagella and cilia, but eukaryotes only have cilia

Additional Problems
Prokaryotic cell movement is attributed to the a. capsule b. ribosomes c. nucleoid area d. flagella 
All of the following about flagella of bacteria are true except a. they are used in locomotion b. they are used in feeding c. they have similar function as mitochondria of eukaryotic cells d. there may be more than one per cell  
A cytoskeleton is:  a. A structure that aids in the process of cell division b. Found in the cytoplasm of eukaryotic cells c. A system of tracks used for transport d. Composed of microtubules and microfilaments e. All are correct
Cilia are not:  a. Found on prokaryotic cells b. Found on eukaryotic cells c. Used for movement d. Short appendages e. Composed of microtubules
Flagella are not:  a. Found on eukaryotic cells b. Found on prokaryotic cells c. Used for movement d. Composed of microtubules e. Short appendages
How do sperm move to fertilize eggs? a. With flagella made of microtubules b. By diffusion c. With flagella made of actin d. With cilia made of microtubules e. With cilia made of actin
What is the role of actin in eukaryotic cells?  a. It is part of the cytoskeleton b. It forms the spindle that pulls chromosomes apart c. It forms the centromere that holds sister chromatids together d. It is necessary for the DNA to replicate e. It is necessary for the nucleosome to form in condensing chromosomes
The cytoskeleton consists of microtubules, microfilaments, and intermediate filaments.  a. True b. False
Scientific evidence is beginning to suggest that some elements of the cytoskeleton may have originated in bacteria.  a. True b. False
What is the structure of cilia and flagella?
Which cytoskeleton provide strong support? What is the names of cytoskeleton in nail formation and staging sarcoma cancer?
 Compare and contrast actin and tubulin polymerization. 
What are three ways in which cilia play a role in cell function? You may consider examples in our own bodies, or in other organisms.
Intermediate filaments are an essential class of cytoskeletal proteins. Give two examples of how they are different from the other cytoskeletal systems, i.e., microtubules and actin. (The best answer will include some details about the other cytoskeletal elements, e.g., composition, proteins that bind actin/tubulin, etc.) 
How do microtubules and actin microfilaments assemble from their subunits in a way that gives them polarity? 
Which cytoskeletal elements are not found in the cytoplasm ofcells in arthropods like crabs?A. Actin filamentsB. Intermediate filamentsC. MicrotubulesD. Actin filaments and microtubulesE. Actin filaments, intermediate filaments, and microtubules
Which of the following statements about the cytoskeleton is true?A. Microfilaments are structurally rigid and resist compression, whereas microtubules resist tension (stretching).B. Movement of cilia and flagella is the result of motor proteins causing microtubules to move relative to each other.C. Transport vesicles among the membranes of the endomembrane system produce the cytoskeleton.D. The dynamic aspect of cytoskeletal function is made possible by the assembly and disassembly of a large variety of proteins into complex aggregates.E. Chemicals that block the assembly of the cytoskeleton would cause little effect on the cell's response to external signals and stimuli.
Which cytoskeletal component is particularly enriched in the shaft of a growing axon?A. microtubulesB. actinC. growth conesD. DNA