Select the correct statements.
A. Tetrad formation is seen during Leptotene.
B. During Anaphase, the centromeres split and chromatide separate.
C. Terminalization takes place during Pachytene.
D. Nucleolus, Golgi complex and ER are reformed during Telophase.
E. Crossing over takes place between sister chromatids of homologous chromosome.
Choose the correct answer from the options given below:

(1). B and D only
(2). A, Cand E only
(3). B and E only
(4). A and C only

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Match List - I with List - II.

Choose the correct answer from the options given below:

(1). (a)- (iii); (b) - (i); (c) - (iv); (d)- (ii)
(2). (a)- (i); (b) - (iii); (c)- (ii); (d) - (iv)
(3). (a)- (ii); (b) - (iii); (c) - (iv); (d) - (i)
(4). (a)- (i); (b) - (ii); (c) - (iii); (d) - (iv)

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Which of the following statements is incorrect?

(1). During aerobic respiration, the role of oxygen is limited to the terminal stage.
(2). In ETC (Electron Transport Chain), onevmolecule of NADH + H+ gives rise to 2 ATP molecules, and one FADH, gives rise to 3 ATP molecules.
(3). ATP is synthesized through complex V.
(4). Oxidation-reduction reactions produce proton gradients in respiration.

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Dissolution of the synaptonemal complex occurs during:

(1). Zygotene
(2). Diplotene
(3). Leptotene
(4). Pachytene

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Which of the following is not a characteristic feature during mitosis in somatic cells ?

(1). Disappearance of nucleolus
(2). Chromosome movement
(3). Synapsis
(4). Spindle fibres

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

What is the main function of the spindle fibers during mitosis?

(1). To regulate cell growth
(2). To separate the chromosomes
(3). To synthesize new DNA
(4). To repair damaged DNA

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Spindle fibres attach to kinetochores of chromosomes during -

(1). Anaphase
(2). Telophase
(3). Prophase
(4). Metaphase

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Given below are two statements:
Statement I: Chromosomes become gradually visible under light microscope during leptotene stage.
Statement II: The beginning of diplotene stage is recognized by dissolution of synaptonemal complex.
In the light of the above statements, choose the correct answer from the options given below:

(1). Statement I is true but Statement II is false.
(2). Statement I is false but Statement II is true.
(3). Both Statement I and Statement II are true.
(4). Both Statement I and Statement II are false

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Match List I with List II:

Choose the correct answer from the options given below:

(1). A-II, B-IV, C-I, D-III
(2). A-IV, B-III, C-II, D-I
(3). A-IV, B-II, C-III, D-I
(4). A-I, B-II, C-IV, D-III

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Following are the stages of cell division:
A. Gap 2 phase
B. Cytokinesis
C. Synthesis phase
D. Karyokinesis
E. Gap 1 phase
Choose the correct sequence of stages from the options given below:

(1). B-D-E-A-C
(2). E-C-A-D-B
(3). C-E-D-A-B
(4). E-B-D-A-C

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

The process of appearance of recombination nodules occurs at which sub stage of prophase I in meiosis ?

(1). Pachytene
(2). Diplotene
(3). Diakinesis
(4). Zygotene

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Which of the following stages of meiosis involves division of centromere?

(1). Metaphase II
(2). Anaphase II
(3). Telophase
(4). Metaphase I

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Among eukaryotes, replication of DNA takes place in:

(1). S phase
(2). ₁ phase
(3). G₂ phase
(4). M phase

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Match List I with List II :

Choose the correct answer from the options given below:

(1). A-IV, B-II, C-I, D-III
(2). A-IV, B-I, C-II, D-III
(3). A-II, B-IV, C-I, D-III
(4). A-III, B-II, C-IV, D-I

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Given below are two statements:
Statement I : During G₀, phase of cell cycle, the cell is metabolically inactive.
Statement II : The centrosome undergoes duplication during S phase of interphase.
In the light of the above statements, choose the most appropriate answer from the options given below:

(1). Both Statement I and Statement II are incorrect.
(2). Statement I is correct but Statement II is incorrect.
(3). Statement I incorrect but Statement II is correct.
(4). Both Statement I and Statement II are correct.

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

The appearance of recombination nodules on homologous chromosomes during meiosis characterizes:

(1). Synaptonemal complex
(2). Bivalent
(3). Sites at which crossing over occurs
(4). Ternminalization

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Select the incorrect statement with reference to mitosis:

(1). All the chromosomnes lie at the equator at metaphase
(2). Spindle fibres, attach to centromere of chromosomes
(3). Chromosomes decondense at the telophase stage
(4). Splitting of centromere occurs at anaphase

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Regarding Meiosis, which of the statements is incorrect?

(1). There are two stages in Meiosis, Meiosis-I and II
(2). DNA replication occurs in S phase of Meiosis-II
(3). Pairing of homologous chromosomes and recombination occurs in Meiosis-I
(4). Four haploid cells are formed at the end of Meiosis-II

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Which of the following stages of meiosis involves division of centromere?

(1). Metaphase I
(2). Metaphase II
(3). Anaphase II
(4). Telophase II

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Match List -I with List - II.

Choose the correct answer from the options given below.

(1). (a) - (iii), (b) - (ii), (c) - (i), (d) - (iv)
(2). (a) - (iv), (b) - (ii), (c) - (iii), (d) - (i)
(3). (a) - (iv), (b) - (i), (c) - (ii), (d) - (iii)
(4). (a) - (ii), (b) - (iv), (c) - (iii), (d) - (i)

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

The centriole undergoes duplication during:

(1). S-phase
(2). Prophase
(3). Metaphase
(4). G₂ phase

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

The fruit fly has 8 chromosomes (2n) in each cell. During interphase of Mitosis if the number of chromosomes at G₁ phase is 8. What would be the number of chromosomes after the S phase?

(1). 8
(2). 16
(3). 4
(4). 32

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Which stage of meiotic prophase shows terminalisation of chiasmata as its distinctive feature?

(1). Leptotene
(2). Zygotene
(3). Diakinesis
(4). Pachytene

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

ldentify the correct statement with regard to G₁ phase (Gap 1) of interphase.

(1). Reorganisation of all cell components takes place.
(2). Cell is metabolically active, grows but does not replicate its DNA.
(3). Nuclear Division takes place.
(4). DNA synthesis or replication takes place.

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

85.Match the following with respect to meiosis
(a) Zygotene | (i) Terminalization
(b) Pachytene | (ii) Chiasmata
(c) Diplotene | (iii) Crossing over
(d) Diakinesis | (iv) Synapsis
Select the correct option from the following:

(1). (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
(2). (a) - (i), (b) - (ii), (c) - (iv), (d) - (iii)
(3). (a) - (ii), (b) - (iv), (c) - (iii), (d) - (i)
(4). (a) - (iii), (b) - (iv), (c) - (i), (d) - (ii)

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage (G). This process occurs at the end of:

(1). G₁ phase
(2). S phase
(3). G₂ phase
(4). M phase

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

The correct sequence of phases of cell cycle is

(1). G₁ → G₂ → S → M
(2). S → G₁ → G₂ → M
(3). G₁ → S → G₂ → M
(4). M → G₁ → G₂ → S

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Cells in G₀ phase

(1). enter the cells cycle.
(2). suspend the cell cycle.
(3). terminate the cell cycle.
(4). exit the cell cycle.

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

The stage during which separation of the paired homologous chromosomes begins is

(1). zygotene.
(2). diakinesis.
(3). diplotene.
(4). pachytene.

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Select the incorrect match

(1). Polytene chromosomes – Oocytes of amphibians
(2). Submetacentric chromosomes – L-shaped chromosomes
(3). Allosomes – Sex chromosomes
(4). Lampbrush chromosomes – Diplotene bivalents

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Anaphase promoting complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur ?

(1). Recombination of chromosome arms will occur
(2). Chromosomes will not condense
(3). Chromosomes will be fragmented
(4). Chromosomes will not segregate

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

DNA replication in bacteria occurs

(1). just before transcription.
(2). during S-phase.
(3). within nucleolus.
(4). prior to fission.

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

A cell at telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at telophase stage. There is no formation of cell plate and thus the cell is containing more number of chromosomes as compared to other dividing cells. This would result in

(1). polyploidy
(2). somaclonal variation
(3). polyteny
(4). aneuploidy

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

Spindle fibres attach on to

(1). kinetochore of the chromosome
(2). centromere of the chromosome
(3). kinetosome of the chromosome
(4). telomere of the chromosome

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02

In meiosis crossing over is initiated at

(1). leptotene
(2). zygotene
(3). diplotene
(4). pachytene

Number of Attempts: 2

Correct Attempts: 1

Time Taken: 00:04

Average Time: 00:02