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15 Cards in this Set

  • Front
  • Back
Describe intermediate filaments
-provide structural support, great tensile strength
-no motile functions
Describe microtubules
-hollow protein filaments
-structural roles and motile functions
-their molecular motors are involved in
-chromosome movement during cell division
-movements of cilia and flagella
-some of the movements of organelles
Describe microfilaments
-helical protein filaments
-structural roles and motile functions
-their molecular motor proteins are involved in
-skeletal muscle contraction
-cell crawling
-cleavage furrow formation
-some of the movements of organelles
tight junctions
serve as diffusion barriers
hold cells tightly together
gap junctions
communication junctions
loss of H atoms (loss of e-)
gain of H atoms (gain e-)
nucleotide is composed of _________, __________, & __________
1) a nitrogenous base
2) a pentose
3) one or more phosphate groups
in vivo, DNA synthesis is________________
DNA is made by a _____________________ enzyme
DNA polymerase
All nucleic acid synthesis occurs in the ___ to ___ direction along the newly made strand.
5' to 3'
The two key functions of nucleic acids
information storage and retrieval
the synthesis of an RNA molecule using a DNA molecule as a template
Enzyme that performs transcription
RNA polymerase