BIOL 1201 Exam 3 (Chap. 12-16)
Questions With Correct Answers!!
Define the cell cycle - ANSWERthe life of a cell from formation to its own division
Most cell division results in daughter cells with identical ___________ -
ANSWERgenetic information (DNA)
What are the reasons for cell division? - ANSWERReproduction (unicelluar
organisms), Growth and Developement (multicellular organisms), Tissue renewal
(replacing damaged cells ex. liver)
Define the genome - ANSWERThe whole of the genetic information of an organism
What is the DNA of a cell packaged in? - ANSWERChromosomes
Define chromosomes - ANSWERlong, thin threads of chromatin associated with
many protiens that maintain the structure and help control gene activity
Define chromatin - ANSWERthe entire complex of DNA and proteins that is the
building material of chromosomes
What form of cell division do somatic (nonreproductive) cells undergo? -
ANSWERMitosis
Somatic cells have ____ sets of chromosomes - ANSWERtwo (diploid)
What form of cell division do gametes (reproductive cells) undergo? -
ANSWERMeiosis
Gametes have ____ as many chromosomes as somatic cells. - ANSWERhalf
(haploid)
Define sister chromatids - ANSWERtwo identical chromatids that are joined
Define centromere - ANSWERSpecialized region where 2 sister chromatids and has
associated enzymatic activity
Chromosome duplication - ANSWERoccurs in the S phase of the cell cycle and is
necessary prior to mitosis
The Mitotic (M) phase contains which two processes? - ANSWERMitosis and
Cytokinesis
What happens during interphase? - ANSWERThe cell grows, performs its duties,
copies its DNA, and prepares for cell division (90% of cycle)
