← Back to Botany

Cell Cycle And Cell Division

161 Questions Start Allen Test
All Exams Allen
Q151 Allen 5. (B) ANALYTICAL QUESTIONS MCQ
Assertion (A) : Meiosis ensures the production of haploid phase in the life cycle of sexually reproducing organism. Reason (R) : Meiosis involve reduction in chromosome number to half as that of parent cell.
A.
Both Assertion and Reason are True and the Reason is a correct explanation of the Assertion.
B.
Both Assertion and Reason are True but Reason is not a correct explanation of the Assertion.
C.
Assertion is True but the Reason is False.
D.
Both Assertion and Reason are False.
Q152 Allen 5. (B) ANALYTICAL QUESTIONS MCQ
Assertion (A) : Cytokinesis in plant cell occur by cell plate formation method. Reason (R) : Cytokinesis in animal cells occur by the formation of cell furrow.
A.
Both Assertion and Reason are True and the Reason is a correct explanation of the Assertion.
B.
Both Assertion and Reason are True but Reason is not a correct explanation of the Assertion.
C.
Assertion is True but the Reason is False.
D.
Both Assertion and Reason are False.
Q153 Allen 5. (B) ANALYTICAL QUESTIONS MCQ
Assertion (A) : No replication of DNA is needed between meiosis-I and meiosis-II. Reason (R) : Chromosomes are already duplicated and they already have two sister chromatids.
A.
Both (A) and (R) are correct but (R) is not the correct explanation of (A).
B.
(A) is correct but (R) is not correct.
C.
(A) is incorrect but (R) is correct.
D.
Both (A) and (R) are correct but (R) is the correct explanation of (A).
Q154 Allen 5. (B) ANALYTICAL QUESTIONS MCQ
What will be the ratio of number of chromosomes and amount of DNA in $G_{1}$ , S and $G_{2}$ phases for a somatic cell? $G_{1}$ S $G_{2}$
A.
1:1 1:1 1:1
B.
1:1 1:2 1:2
C.
1:2 1:2 1:2
D.
1:2 1:1 1:2
Q155 Allen 5. (B) ANALYTICAL QUESTIONS MCQ
Given below is a schematic break-up of the phases/stages of cell cycle :- Which one of the following is the correct indication of the stage/phase in the cell cycle?
A.
A – Cytokinesis
B.
B – Metaphase
C.
C – Karyokinesis
D.
D – Synthetic phase
Q156 Allen 5. (B) ANALYTICAL QUESTIONS MCQ
During mitosis ER and nucleolus begin to disappear at :
A.
Early prophase
B.
Late prophase
C.
Early metaphase
D.
Late metaphase
Q157 Allen 5. (B) ANALYTICAL QUESTIONS MCQ
Which stages of cell division do the following figures A and B represent respectively? (A) (B)
A.
Prophase
- Anaphase
B.
Metaphase
- Telophase
C.
Telophase
- Metaphase
D.
Late Anaphase
- Prophase
Q158 Allen 5. (B) ANALYTICAL QUESTIONS MCQ
Select the correct option with respect to mitosis
A.
Chromatids separate but remain in the centre of the cell in anaphase.
B.
Chromatids start moving towards opposite poles in telophase.
C.
Golgi complex and endoplasmic reticulum are still visible at the end of prophase.
D.
Chromosomes move to the spindle equator and get aligned along equatorial plate in metaphase
Q159 Allen 5. (B) ANALYTICAL QUESTIONS MCQ
At metaphase, chromosomes are attached to the spindle fibres by their :-
A.
Centromere
B.
Satellites
C.
Secondary constrictions
D.
Kinetochores
Q160 Allen 5. (B) ANALYTICAL QUESTIONS MCQ
Given below is the representation of a certain event at a particular stage of a type of cell division. Which is this stage?
A.
Prophase of Mitosis
B.
Both prophase and metaphase of mitosis
C.
Prophase I during meiosis
D.
Prophase II during meiosis
Q161 Allen 5. (B) ANALYTICAL QUESTIONS MCQ
A stage in cell division is shown in the figure. Select the answer which gives correct identification of the stage with its characteristics.
A.
Telophase – Endoplasmic reticulum and nucleolus not reformed yet.
B.
Telophase – Nuclear envelope reforms, Golgi complex reforms.
C.
Late anaphase – Chromosomes move away from equatorial plate, Golgi complex not present.
D.
Cytokinesis – Cell plate formed, mitochondria distributed between two daughter cells.