Chapter 17 Quiz

What is the significance of the cell cortex?

• The cell cortex is responsible for energy production in the cell.
• The cell cortex is involved in DNA replication within the cell.
• The cell cortex plays a role in regulating extracellular communication.
• The cell cortex is significant for maintaining cell shape, cell division, cell motility, and intracellular transport.

What is the cytoskeleton made up of?

• dna

• intermediate filaments

• microtubules

• actin filaments

What is a key characteristic of intermediate filaments?

• Regulation of gene expression
• Structural role in providing mechanical strength
• Energy production through ATP synthesis
• Transport of genetic material within the cell

What are the different types of intermediate filaments?

• Keratins, Vimentin, Neurofilaments, Nuclear lamins

• Tubulin, Neurofilaments, Nuclear lamins

• Actin, microtubules, keratins, vimentin

• Myosin, nuclear lamins, neurofilaments

How do nuclear lamins form and reform?

• Nuclear lamins form and reform through phosphorylation & dephosphorylation.

• Nuclear lamins form by osmosis and reform during cell division.
• Nuclear lamins form by telekinesis and reform during cell division.
• Nuclear lamins form by photosynthesis and reform during cell division.

How do capping proteins stabilize microtubules?

• By inhibiting microtubule polymerization
• By destabilizing the microtubule structure
• By binding to the ends of microtubules
• By promoting microtubule disassembly

Which protein is primarily responsible for the contraction of muscle cells?

• Myosin

• Keratin

• Vimentin

• Actin

What role do microtubules play during cell division?

• They are responsible for DNA replication.

• They form the mitotic spindle, which helps segregate chromosomes.

• They produce ATP for energy.

• They are involved in modifying proteins.

What is the primary function of actin filaments in cells?

• Energy storage

• Protein synthesis

• Cell shape and movement

• Transport of ions

MTs grow and shrink independent of their neighbors.

• True

• False