Many cells function properly and divide mitotically even though they do not have 

(1) Plasma membrane

(2) Cytoskeleton

(3) Mitochondria

(4) Plastids

Which of the following is not a characteristic of meiosis?
(1) It involves two stages of DNA replication one before meiosis-I and another before meiosis-II

(2) It involves recombination and crossing over

(3) Sister chromatids separate during anaphase- II

(4) Nuclear membrane disappears during prophase.

Microtubule depolymerizing drug such as colchicine is expected to 

(1) inhibit spindle formation during mitosis 

(2) inhibit cytokinesis

(3) allow mitosis beyond metaphase

(4) induce formation of multiple contractile

Which of the following statements is incorrect about G₀ phase.
(1) Mitosis occurs after G₀ phase.

(2) Biocatalysts can be used to exit G₀ phase.

(3) Cell volume keeps on increasing during this phase.

(4) Cell metabolism occurs continuously in G₀ phase.

Beads on string like structures of A are seen in B, which further condense to form chromosomes in C stage of cell division.

            A                   B                   C

(1) Chromonema  Chromatin       Metaphase

(2) Chromatin      Chromatid       Metaphase

(3) Chromonema  Chromosome    Anaphase

(4) Chromonema  Chromatid       Anaphase.

In a diploid cell, at which stage of cell cycle, the amount of DNA is doubled?

(1) G₁ and G₂ phase

(2) G₀ phase

(3) S, G₂ and M phase

(4) S phase

Which is the longest phase of the cell cycle?
(1) M-phase

(2) Interphase

(3) Leptotene

(4) S-phase

The checkpoint in cell cycle plays important role in 

(1) repairing DNA damage

(2) apoptosis initiation

(3) assessing DNA damage

(4) none of these.

Identify the correct matched pair.
(1) Segregation-Metaphase ll

(2) Significance of meiosis-production of genetically similar cells

(3) Exchange of genetic material- DIakinesis

(4) Anaphase ll of meiosis-Centromeric division

The mandatory combination responsible for assembly of microtubules are

(1) $N{a}^{+}$ and $C{a}^{2+}$

(2) $M{g}^{2+}$ and $C{a}^{2+}$

(3) $C{l}^{-}$ and $C{a}^{2+}$

(4) $N{a}^{+}$ and $K^{+}$