Biology
Cell Cycle and Chromosomes
1,219 Questions
Explore a curated list of questions covering the cell cycle, mitosis, and meiosis. Topics include DNA replication, chromosomal structures, and genetic disorders. This material is essential for students preparing for biology and general science competitive exams.
Cell cycle eventsDNA replicationMeiosis processChromosomal structuresGenetic disorders
Cell Cycle and Chromosomes Questions
-
leptotene
-
pachytene
-
zygotene
-
diplotene
B
Correct answer
Explanation
The longest phase in prophase I of meiosis is pachytene.
D
Correct answer
Explanation
The number of cells formed from one cell at the end of Meiosis II are 4.
-
pachytene
-
diplotene
-
diakinesis
-
zygotene
C
Correct answer
Explanation
The transition stage of meiotic prophase I to metaphase I is diakinesis.
C
Correct answer
Explanation
The cell cycle consists of a mitotic (M) phase, during which first nuclear division (mitosis) and then cell division (cytokinesis) take place. The shortest phase in the cell cycle is M phase
-
flagellin
-
actin
-
myosin
-
tubulin
D
Correct answer
Explanation
Spindle fibres are made up of tubulin.
-
G1 and G2 phase
-
G1, G2 and S phase
-
S, M and G1 phase
-
G1 to S phase
B
Correct answer
Explanation
The cell cycle consists of a mitotic(M) phase, during which first nuclear division (mitosis) and then celldivision (cytokinesis) take place. The M phase is followed by a long period of growth known as interphase. Interphase has three subphases (G1, S and G2) in cells that divide.
-
the generation of proteins
-
karyokinesis
-
the completion of cell cycle
-
the generation of DNA
C
Correct answer
Explanation
In cell cycle process, the term generation time is used to refer the time required for the completion of cell cycle.
-
mitosis
-
amitosis
-
meiosis
-
endomitosis
C
Correct answer
Explanation
The type of cell division occuring during the maturation phase of spermatogenesis is meiosis in which half the chromosomes of the parent cells are formed.
-
leptotene
-
pachytene
-
diplotene
-
zygotene
D
Correct answer
Explanation
The homologous chromosomes pair by adhering along their lengths, a process called synapsis. This process occurs in zygotene.
-
prophase
-
metaphase
-
anaphase
-
interphase
D
Correct answer
Explanation
The most active phase of nucleus during cell division is interphase, in which all the metabolic activities like chromosome and centriole duplication, DNA replication, cell growth etc. take place.
-
The place where mitotic spindle fibres attach to centrioles.
-
The place where mitotic spindle attaches to chromosomes.
-
The place where both chromatids are attached to each other.
-
The fibres which originate from centrioles and form spindle.
B
Correct answer
Explanation
The place where mitotic spindle attaches to chromosomes is called kinetochore.
-
Division of centromere.
-
The daughter chromosomes begin moving towards opposite poles of the cell due to the action of the spindle.
-
Chromosomes arrange themselves at equatorial plane.
-
Complete set of chromosomes assembles at each pole of the cell.
C
Correct answer
Explanation
Chromosomes arrange themselves at equatorial plane in metaphase.
-
G1 phase
-
G2 phase
-
M phase
-
S phase
C
Correct answer
Explanation
During M phase, the contents of nucleus and cytoplasm are divided.
-
end of telophase
-
end of cytokinesis
-
end of cell cycle
-
end of interphase
B
Correct answer
Explanation
End of cytokinesis marks the end of M-phase.
-
prometaphase
-
early anaphase
-
prophase
-
metaphase
A
Correct answer
Explanation
Disintegration of nuclear envelope takes place at prometaphase.