BIO 121 Exam 3 Review UPDATED
ACTUAL Exam Questions and CORRECT
Answers
Binary fission - CORRECT ANSWER - a method of asexual reproduction; "division in
half"; involves mitosis in eukaryotes
Mitosis - CORRECT ANSWER - a process of nuclear division in eukaryotes
What are the 5 stages of Mitosis? - CORRECT ANSWER - 1. Prophase
2. Prometaphase
3. metaphase
4. anaphase
5. telophase
Meiosis - CORRECT ANSWER - A modified type of cell division in sexually reproducing
organisms consisting of 2 rounds of cell division, but one round of DNA replication. Half
number of chromosome sets as original cell
Sexual Reproduction - CORRECT ANSWER - A type of reproduction in which two
parents give rise to one offspring that have unique combination of genes inherited by both
parents via gametes
Asexual Reproduction - CORRECT ANSWER - A type of reproduction with one parent;
no fusion of gametes; budding, division of a single cell; genetically identical to the parent
Haploid - CORRECT ANSWER - A cell containing one set of chromosomes
Diploid - CORRECT ANSWER - A cell containing two sets of chromosomes; one from
each parent
,Prophase - CORRECT ANSWER - 1st stage of mitosis; chromatin (chromosomes)
condense
Prometaphase - CORRECT ANSWER - 2nd stage of mitosis; nuclear envelope fragments;
each chromatid gets a kinetochore
Metaphase - CORRECT ANSWER - 3rd stage of mitosis; Chromosomes line up in the
middle of the cell
Anaphase - CORRECT ANSWER - 4th stage of mitosis; sister chromatids separate from
each other and are pulled towards opposite ends of the cell; shortest stage
Telophase - CORRECT ANSWER - 5th stage of mitosis;2 nuclei form; mitotic spindle
breaks down
Cytokinesis - CORRECT ANSWER - The division of the cytoplasm to form two separate
daughter cells
Interphase - CORRECT ANSWER - The period in the cell cycle when the cell is not
dividing ; cellular metabolic activity is high; 90 % of cell cycle
Chromosome - CORRECT ANSWER - A cellular structure carrying genetic material; in
nucleus; made up of a very long DNA molecule and proteins
Tubulin - CORRECT ANSWER - Globular protein that constructs the wall of the
microtubules
Sister Chromatid - CORRECT ANSWER - 2 copies of a duplicated chromosome attached
to each other at the centromere (sometimes along arms)
, Microtuble - CORRECT ANSWER - A hallow rod composed of tubulin proteins that
make up part of the cytoskeleton in all eukaryotic cells
Centrosome - CORRECT ANSWER - in cytoplasm of animal cells; functions as a
microtubule organizing center
Centromere - CORRECT ANSWER - the region on each sister chromatid where they are
most closely attached to each other ; in a duplicated chromosome
Mitotic spindle - CORRECT ANSWER - An assemblage of microtubules ; involved in
movement of chromosomes
Kinetochere - CORRECT ANSWER - A structure of proteins attached to the centromere
that links each sister chromatid to the mitotic spindle
Homologous Chromosomes - CORRECT ANSWER - A pair of chromosomes of the same
length, centromere position and staining pattern that possesses genes for the same characters at
corresponding loci
Separase - CORRECT ANSWER - An enzyme that starts the anaphase stage of mitosis;
separates the sister chromatids
Cyclin - CORRECT ANSWER - A cellular protein that occurs in a cyclically fluctuating
concentration and that plays an important role in regulating the cell cycle
Cyclin dependent kinase (cdk) - CORRECT ANSWER - A protein kinase that is active
only when attached to a particular cyclin
MPF - CORRECT ANSWER - Maturation -promoting factor; protein complex required
for a cell to progress from late interphase to mitosis;helps initiate mitosis
ACTUAL Exam Questions and CORRECT
Answers
Binary fission - CORRECT ANSWER - a method of asexual reproduction; "division in
half"; involves mitosis in eukaryotes
Mitosis - CORRECT ANSWER - a process of nuclear division in eukaryotes
What are the 5 stages of Mitosis? - CORRECT ANSWER - 1. Prophase
2. Prometaphase
3. metaphase
4. anaphase
5. telophase
Meiosis - CORRECT ANSWER - A modified type of cell division in sexually reproducing
organisms consisting of 2 rounds of cell division, but one round of DNA replication. Half
number of chromosome sets as original cell
Sexual Reproduction - CORRECT ANSWER - A type of reproduction in which two
parents give rise to one offspring that have unique combination of genes inherited by both
parents via gametes
Asexual Reproduction - CORRECT ANSWER - A type of reproduction with one parent;
no fusion of gametes; budding, division of a single cell; genetically identical to the parent
Haploid - CORRECT ANSWER - A cell containing one set of chromosomes
Diploid - CORRECT ANSWER - A cell containing two sets of chromosomes; one from
each parent
,Prophase - CORRECT ANSWER - 1st stage of mitosis; chromatin (chromosomes)
condense
Prometaphase - CORRECT ANSWER - 2nd stage of mitosis; nuclear envelope fragments;
each chromatid gets a kinetochore
Metaphase - CORRECT ANSWER - 3rd stage of mitosis; Chromosomes line up in the
middle of the cell
Anaphase - CORRECT ANSWER - 4th stage of mitosis; sister chromatids separate from
each other and are pulled towards opposite ends of the cell; shortest stage
Telophase - CORRECT ANSWER - 5th stage of mitosis;2 nuclei form; mitotic spindle
breaks down
Cytokinesis - CORRECT ANSWER - The division of the cytoplasm to form two separate
daughter cells
Interphase - CORRECT ANSWER - The period in the cell cycle when the cell is not
dividing ; cellular metabolic activity is high; 90 % of cell cycle
Chromosome - CORRECT ANSWER - A cellular structure carrying genetic material; in
nucleus; made up of a very long DNA molecule and proteins
Tubulin - CORRECT ANSWER - Globular protein that constructs the wall of the
microtubules
Sister Chromatid - CORRECT ANSWER - 2 copies of a duplicated chromosome attached
to each other at the centromere (sometimes along arms)
, Microtuble - CORRECT ANSWER - A hallow rod composed of tubulin proteins that
make up part of the cytoskeleton in all eukaryotic cells
Centrosome - CORRECT ANSWER - in cytoplasm of animal cells; functions as a
microtubule organizing center
Centromere - CORRECT ANSWER - the region on each sister chromatid where they are
most closely attached to each other ; in a duplicated chromosome
Mitotic spindle - CORRECT ANSWER - An assemblage of microtubules ; involved in
movement of chromosomes
Kinetochere - CORRECT ANSWER - A structure of proteins attached to the centromere
that links each sister chromatid to the mitotic spindle
Homologous Chromosomes - CORRECT ANSWER - A pair of chromosomes of the same
length, centromere position and staining pattern that possesses genes for the same characters at
corresponding loci
Separase - CORRECT ANSWER - An enzyme that starts the anaphase stage of mitosis;
separates the sister chromatids
Cyclin - CORRECT ANSWER - A cellular protein that occurs in a cyclically fluctuating
concentration and that plays an important role in regulating the cell cycle
Cyclin dependent kinase (cdk) - CORRECT ANSWER - A protein kinase that is active
only when attached to a particular cyclin
MPF - CORRECT ANSWER - Maturation -promoting factor; protein complex required
for a cell to progress from late interphase to mitosis;helps initiate mitosis
