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Transcript
MIRA COSTA COLLEGE
LIFE SCIENCES DEPARTMENT
General Biology Lecture (BIO101)
Instructor: Elmar Schmid, Ph.D.
QUIZ #6
Mitosis
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Answer the following questions of this ‘open book, open notes and free access instructor
website’ quiz and mark it on a Scantron 882-E answer sheet.
All questions must be answered by the student without help by class mates, friends or other
human beings. Please read the following statement below carefully and sign it if you satisfy
the guidelines outlined in this statement. This signed take home exercise sheet must be
turned in with your answer sheet to receive full credit for this assignment. This assignment is
due at the first class meeting the following week.
I HAVE ANSWERED THE QUESTIONS IN THIS EXERCISE ON MY OWN. I DID NOT CONSULT OTHERS OR
IN ANY CONDUCT IN ANY ACTIVITITES THAT COULD BE CONSTRUED AS CHEATING IN THIS
ASSIGNMENT. I DID NOT MAKE ANY COPIES OF THIS ASSIGNMENT.
_________________________________
(PRINT YOUR NAME)
________________________________
(YOUR SIGNATURE)
Q. 1: Mitosis is a biological process important for which of the following events occurring in life
forms?
A) embryonic growth
B) sexual reproduction
C) tissue repair
D) cell communication
E) both, a and d
Q. 2: When a eukaryotic cell is not dividing, its genetic material can be found in the form of very
long, thin fibers referred to as:
A) chromatin
B) RNA
C) microtubules
D) chromatids
E) the nucleolus
Q. 3: DNA replication takes place during which phase of the cell cycle?
A) G1 phase
B) S phase
C) G2 phase
D) M phase
E) there is no DNA copied during the cell cycle
Q. 4: Cell cycle regulation and control involves which of the following?
A) presence of cyclins
B) action of microtubules
C) action of cyclin-dependent kinases (cdks)
D) existence of two check points
E) all of the above, except b
MIRA COSTA COLLEGE
LIFE SCIENCES DEPARTMENT
General Biology Lecture (BIO101)
Instructor: Elmar Schmid, Ph.D.
Q. 5: During prophase of mitosis, each chromosome of an eukaryotic cell consists of a pair of
identical structures, called
A) chromatin
B) sister chromosomes
C) DNA transcripts
D) nucleoli
E) sister chromatids
Q. 6: Which of the following events is NOT associated with prophase of mitosis?
A) DNA condensation
B) separation of sister chromatids
C) duplication of centrosomes
D) breakdown of the nuclear envelope
E) both, b and d
Q. 7: Chromatin consists of which of the following cellular molecule pairs?
A) RNA and DNA
B) RNA and proteins
C) DNA and polysaccharides
D) DNA and proteins
E) proteins and lipids
Q. 8: During which phase of mitosis do the chromosomes line-up on a virtual plane located
equidistant from the two spindle poles?
A) Interphase B) Prophase
C) Metaphase D) Anaphase E) Telophase
Q. 9: If the cell cycle check points wouldn’t work and the S-phase was eliminated from the cell
cycle, the daughter cells formed after mitosis would
A) have half the genetic material found in the parental cell
B) be genetically identical
C) be genetically identical to the parental cell
D) synthesize the missing genetic material on their own
E) both, b and c
Q. 10: The two anti-cancer drugs taxol or vinblastin, prevent cancer cells from dividing because:
A) they block the build-up of new DNA (inhibit DNA replication)
B) they prevent the cells from forming a cleavage furrow during mitosis
C) they prevent the cells from forming a functioning microtubular spindle apparatus
D) they inhibit (= block) proteins and enzymes of the cell cycle check points
E) they prevent the uptake of nutrients into the cancer cells
Q. 11: The diploid chromosome set of a human somatic cell consists of how many chromosomes?
A) 14
B) 23
C) 46
D) 58
E) 64
Q. 12: Eukaryotic cells spend most of their cell cycle in M-phase.
A) True
B) False
MIRA COSTA COLLEGE
LIFE SCIENCES DEPARTMENT
General Biology Lecture (BIO101)
Instructor: Elmar Schmid, Ph.D.
Q. 13: Which of the following is a probable role of the spindle microtubules that are NOT attached
to the kinetochores?
A) they aid in the movement of chromosomes to the poles of the cell
B) they play a role in cytokinesis
C) they play a role in cell stretching and elongation
D) they play a role in control of cell division
E) none of the above
Q. 14: Cancer cells (in contrary to normal body cells) are characterized by
A) a sudden switch to meiotic cell divisions
B) frequent mutations of the genes of protein components of the cell cycle control system
C) uncontrolled, repeated mitotic cell divisions
D) their independence of cellular growth factors
E) all of the above, except a
Q. 15: ____ are all of the body’s cells with the exception of the cells responsible for reproduction
A) Gametes
B) Somatic cells
C) Stem cells
D) Germ cells
E) None of the above
Bonus Q.: Prokaryotic cells, i.e. bacteria, perform cell divisions by a process called
A) Prokaryotic mitosis
B) cytokinesis
C) spore formation
D) binary fission
E) none of the above