The microtubule organizing center (MTOC) of an animal cell is an identifiable structure known as the
____.
a. cell plate
b. centrosome
c. kinetochore
d. centromere
e. chromosome
B
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Which of the following choices represents the complete sequence of events relating to meiosis?
a. cell division, DNA replication, cell division b. DNA replication, cell division, DNA replication, cell division c. DNA replication, cell division, cell division d. DNA replication, cell division
In prokaryotes, which of the following types of regulation will NOT occur?
a. chromatin remodeling b. variations of mRNA turnover c. variations in protein turnover d. activation of promoters e. regulation of transcription
Which pinniped can use its hind limbs to walk on land?
a. Guadalupe fur seal b. Steller's sea lion c. leopard seal d. elephant seal e. harbor seal
Which mineral ion is required for ribozymes to become active and begin self-replication?
a. ferrous iron b. ferric iron c. zinc d. magnesium e. selenium