CMB1004 Cell biology Lecture 4 Exam
Questions With 100% Verified Answers
Cytoskeleton - answerA network of fibers that holds the cell together, helps the cell to keep its
shape, and aids in movement
Wha type of proteins are associated with the cytoskeleton and help with movement? -
answerMotor...
Cytoskeleton - answer✔A network of fibers that holds the cell together, helps the cell to keep its
shape, and aids in movement
Wha type of proteins are associated with the cytoskeleton and help with movement? -
answer✔Motor proteins
What are the 3 main components of the cytoskeleton? - answer✔Intermediate filaments
Microtubules
Actin filaments
Where are intermediate filaments found? - answer✔cytoplasm and nucleus
Purpose of intermediate filaments - answer✔Provide mechanical strength
What are the IFs found in the nucleus called? - answer✔Nuclear lamins
Nuclear lamins - answer✔Intermediate filaments that make up the nuclear lamina layer—a
lattice-like layer inside the nuclear envelope that acts as an anchorage site for chromosomes and
nuclear pores
What are the 3 types of nuclear lamins? - answer✔LMNA, LMNB, LMNC
What happens to nuclear lamins during cell division/mitosis? - answer✔They break down
What are the 3 types of cytoplasmic IFs? - answer✔Keratins
Neurofilaments
Vimentin/Vimentin-related
Diameter of intermediate filaments - answer✔10 nm
How do the IFs provide strength? - answer✔Distribute tensile force across the cell
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