Bio 1201 Exam 3 UPDATED ACTUAL
Exam Questions and CORRECT Answers
centromere - CORRECT ANSWER - area of attachment between two sister chromatids
Kinetochores - CORRECT ANSWER - structures of proteins and specific sections of
chromosomal DNA at the centromere; point of attachment of duplicated chromosome
Chromatids - CORRECT ANSWER - Two copies of duplicated chromosome
Spindle Apparatus - CORRECT ANSWER - formed from microtubules extending from
two centromeres; as centrosomes move way from each other the microtubules lengthen
to see if DNA is damaged - CORRECT ANSWER - What is the G1 checkpoint for?
to check to see if DNA is replicated properly - CORRECT ANSWER - What is the G2
checkpoint for?
spindle assembly checkpoint, checks for alignment of the chromosomes - CORRECT
ANSWER - What is the M checkpoint for?
Synthesis of cell components increase in the number of organelles - CORRECT
ANSWER - What occurs in G1 phase of interphase?
synthesis (replication) of DNA; doubling genetic material - CORRECT ANSWER - What
occurs in S phase of interphase?
centrioles replicate in animal cells; structure of cytokinesis is put into place - CORRECT
ANSWER - What occurs in G2 phase of interphase?
, non-dividing phase; most cells in human body are non dividing - CORRECT ANSWER -
What is G0 phase?
Produce daughter cells that have identical genetic components; occurs in somatic cells -
CORRECT ANSWER - What is Mitosis?
somatic cells - CORRECT ANSWER - Where does Mitosis take place? (What cells)
Cell division for gamete (sex cell) production; in specialized tissues; produces cells with the
haploid chromosome number - CORRECT ANSWER - What is Meiosis?
Haploid - CORRECT ANSWER - One set of chromosomes (1n)
Diploid - CORRECT ANSWER - Two sets of chromosomes (2n) one from each parent
with the 1n chromosome
G1, S, G2 - CORRECT ANSWER - Three phases of interphase?
Division of cytoplasm - CORRECT ANSWER - What is cytokinesis?
cells with more than one nucleus - CORRECT ANSWER - In the cells of some organisms,
mitosis occurs without cytokinesis, this will result in ...
Prophase I (Meiosis) - CORRECT ANSWER - Spindle formation; breakdown of nuclear
envelope; nucleoli disappear; chromosomes condense. Each chromosome consists of two
chromatids from S phase of interphase. Homologous chromosome pairs lie next to one another.
Crossing over of chromatids between pairs (chiasma formation) occurs.
Metaphase I (Meiosis) - CORRECT ANSWER - Homologous chromosome pairs align on
equator of spindle. Kinetochores of sister chromatids are attached to fibers going to the opposite
pole.
Exam Questions and CORRECT Answers
centromere - CORRECT ANSWER - area of attachment between two sister chromatids
Kinetochores - CORRECT ANSWER - structures of proteins and specific sections of
chromosomal DNA at the centromere; point of attachment of duplicated chromosome
Chromatids - CORRECT ANSWER - Two copies of duplicated chromosome
Spindle Apparatus - CORRECT ANSWER - formed from microtubules extending from
two centromeres; as centrosomes move way from each other the microtubules lengthen
to see if DNA is damaged - CORRECT ANSWER - What is the G1 checkpoint for?
to check to see if DNA is replicated properly - CORRECT ANSWER - What is the G2
checkpoint for?
spindle assembly checkpoint, checks for alignment of the chromosomes - CORRECT
ANSWER - What is the M checkpoint for?
Synthesis of cell components increase in the number of organelles - CORRECT
ANSWER - What occurs in G1 phase of interphase?
synthesis (replication) of DNA; doubling genetic material - CORRECT ANSWER - What
occurs in S phase of interphase?
centrioles replicate in animal cells; structure of cytokinesis is put into place - CORRECT
ANSWER - What occurs in G2 phase of interphase?
, non-dividing phase; most cells in human body are non dividing - CORRECT ANSWER -
What is G0 phase?
Produce daughter cells that have identical genetic components; occurs in somatic cells -
CORRECT ANSWER - What is Mitosis?
somatic cells - CORRECT ANSWER - Where does Mitosis take place? (What cells)
Cell division for gamete (sex cell) production; in specialized tissues; produces cells with the
haploid chromosome number - CORRECT ANSWER - What is Meiosis?
Haploid - CORRECT ANSWER - One set of chromosomes (1n)
Diploid - CORRECT ANSWER - Two sets of chromosomes (2n) one from each parent
with the 1n chromosome
G1, S, G2 - CORRECT ANSWER - Three phases of interphase?
Division of cytoplasm - CORRECT ANSWER - What is cytokinesis?
cells with more than one nucleus - CORRECT ANSWER - In the cells of some organisms,
mitosis occurs without cytokinesis, this will result in ...
Prophase I (Meiosis) - CORRECT ANSWER - Spindle formation; breakdown of nuclear
envelope; nucleoli disappear; chromosomes condense. Each chromosome consists of two
chromatids from S phase of interphase. Homologous chromosome pairs lie next to one another.
Crossing over of chromatids between pairs (chiasma formation) occurs.
Metaphase I (Meiosis) - CORRECT ANSWER - Homologous chromosome pairs align on
equator of spindle. Kinetochores of sister chromatids are attached to fibers going to the opposite
pole.
