Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

Cell Cycle and Cell Division

Multiple Choice Questions

31.

Select the wrong statement :

Cell wall is present in members of Fungi and Plantae
Mushrooms belong to Basidiomycetes
Mitochondria are the powerhouse of the cell in all kingdoms except Monera
Pseudopodia are locomotory and feeding structures in Sporozoans

32.

Post-mitotic gap phase is characterised by all, except

Synthesis of RNA and nucleotides
No change in DNA content
Synthesis of histone proteins
Growth phase of the hell

33.

Independent assortment of gene occurs due to the orientation of chromosomes at

Metaphase-I of mitosis
Metaphase-I of meiosis
Metaphase-II of meiosis
Any phase of the cell division

34.

The non-disjunction, in meiosis may result is extra copy of a chromosome in a sperm cell. During which phase the above phenomenon may occur?

Prophase-I, prophase-II
Prophase-I, prophase-II
Anaphase-I, anaphase-II
Anaphase-I, telophase-II

35.

The mitotic cell cycle is divided typically into four phases; G₁, S, G₂ and M. Considering a mitotic cycle time of 18 hrs; the distribution of period of time (in hrs) for each of these phases will be

G₁ S G₂ M

1 3 5 9
G₁ S G₂ M

9 1 3 5
G₁ S G₂ M

9 5 3 1
G₁ S G₂ M

3 5 9 1

36.
Which one of the following precedes re-formation of the nuclear envelope during M-phase of the cell Cycle?

Decondensation from chromosome and reassembly of the nuclear lamina

Transcription from chromosome and reassembly of the nuclear lamina

Formation of the contractile ring and formation of the phragmoplast

Formaltion of the contractile ring and transcription from chromosomes

Decondensation from chromosome and reassembly of the nuclear lamina

At telophase stage, nuclear membrane vesicles associate with the surface of individual chromosomes and fuse to reform the nuclear membranes, which partially enclose clusters of chromosomes before coalescing to reform the complete nuclear envelope. During this process, the nuclear pores reassemble and the dephosphorylated reassociate to form the nuclear lamina) One of the lamina proteins (lamina-B) remains with the nuclear membrane fragments throughout mitosis and may help nucleate assembly. After the nucleus reforms, the pores pump in nuclear proteins, the chromosome decondense and RNA synthesis resume, causing the nucleolus to reappear.