Some cytoskeletal elements are more permanent than others. Which components of the cytoskeleton are dynamic structures?
A. microtubules
B. microfilaments
C. intermediate filaments
D. both microtubules and intermediate
filaments
E. both microtubules and microfilaments
E
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Viruses simultaneously contain DNA, RNA, and protein
Indicate whether this statement is true or false.
How does an enzyme work to catalyze a reaction?
It supplies the energy to speed up a reaction. It lowers the energy barrier needed for reactants to achieve the transition state. It lowers the energy of activation of a reaction. It supplies the energy to speed up a reaction and lowers the energy barrier needed for reactants to achieve the transition state. It lowers the energy barrier needed for reactants to achieve the transition state or lowers the energy of activation of a reaction.
When the DNA of a bacterial phage is integrated into a host bacterial cell, that is called _________.
a) lysogenic b) a prophage c) attenuated d) competent
Which of the following is NOT an exclusive criterion for eusociality?
a. reproductive division of labor b. division of labor c. cooperative rearing d. overlapping generations e. B and D