-
question_answer1)
A cell is bound to divide, if it has entered:
A)
\[{{\operatorname{G}}_{2}}-phase\] done
clear
B)
\[{{\operatorname{G}}_{1}}-phase\] done
clear
C)
Prophase done
clear
D)
S - phase done
clear
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question_answer2)
In plants, active mitosis occurs in:
A)
Cambium done
clear
B)
Leaf tip done
clear
C)
Root base done
clear
D)
Mid vein done
clear
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question_answer3)
In meiosis, actual haploidy in terms of DNA comes in:
A)
Metaphase-I done
clear
B)
Anaphase-II done
clear
C)
Anaphase-I done
clear
D)
Interkinesis done
clear
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question_answer4)
Match the terms (given in column-I) with their explanation (given in column-II) and choose the correct combination from the options given below
| Column-I (Terms) | | Column-II (Explanation) |
A. | Terminalization | I. | Pairing of homolologous |
B. | Synapsis | II. | Point of attachment between homologous chromosomes. |
C. | Chiasmata | III. | Nuclear protein complex that helps in adherence of sister chromatids and then homologous chromosomes. |
D. | Synaptonemal complex | IV. | Shifting of chiasmata outwards complex towards the ends of a bivalent. |
A)
A - IV; B - I; C - II; D - III done
clear
B)
A-II; B - III; C - IV; D - I done
clear
C)
A - II; B - IV; C - III; D - I done
clear
D)
A - IV; B - I; C - III; D - II done
clear
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question_answer5)
If the number of bivalents are 8 in metaphase-I, what shall be the number of chromosomes in daughter cells after meiosis -1 and meiosis - II respectively?
A)
8 and 4 done
clear
B)
4 and 4 done
clear
C)
8 and 8 done
clear
D)
16 and 8 done
clear
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question_answer6)
Programmed cell death (apoptosis):
A)
Occurs in cells that have been deprived of essential nutrients. done
clear
B)
Occurs only in cells that have damaged DNA. done
clear
C)
Is a natural process during development? done
clear
D)
Is signaled by the initiated mitosis. done
clear
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question_answer7)
Number of chromosomes in a zygote may be indicated by:
A)
4x done
clear
B)
x done
clear
C)
3x done
clear
D)
2x done
clear
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question_answer8)
At which stage of cell cycle division the homologous chromosome separate, while sister chromatid remain associated at their centromere:
A)
Metaphase-I of meiosis done
clear
B)
Anaphase-I of meiosis done
clear
C)
Metaphase of mitosis done
clear
D)
Anaphase of mitosis done
clear
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question_answer9)
Identify the given figures (1, 2 & 3) showing meiotic phases and select the correct option.
A)
1-Metaphase 2-Anaphase 3-Telophase done
clear
B)
1-Metaphase-I 2-Anaphase-I 3-Telophase-I done
clear
C)
1-Metaphase-II 2-Anaphase-II 3-Telophase-II done
clear
D)
1-Anaphase-I 2-Metaphase-I 3-Telophase-I done
clear
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question_answer10)
During which stages (or prophase I substages) of meiosis do you expect to find the bivalents and DNA replication respectively?
A)
Pachytene and interphase (between two meiotic divisions). done
clear
B)
Pachytene and interphase (just prior to prophase I). done
clear
C)
Pachytene and S phase (of interphase just prior to prophase I). done
clear
D)
Zygotene and S phase (of interphase prior to prophase I). done
clear
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question_answer11)
Which of the following is correct for the mitotic spindle?
A)
It is composed of actin and myosin microfilaments. done
clear
B)
It is composed of kinetochores at the metaphase plate. done
clear
C)
It is composed of microtubules, which help to separate the chromosomes to opposite poles of the cell. done
clear
D)
It originates only at the centrioles in the centrosomes. done
clear
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question_answer12)
Which of the following is not a function of mitotic cell division in animals?
A)
Asexual reproduction done
clear
B)
Growth done
clear
C)
Repair of damaged organs done
clear
D)
Production of gametes done
clear
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question_answer13)
In \[{{\operatorname{G}}_{1}}-phase\] of cell division:
A)
RNA and proteins are synthesised for cell growth and subsequent DNA replication. done
clear
B)
DNA and proteins are synthesised. done
clear
C)
Formation of RNA and protein continues for spindle formation and cell growth. done
clear
D)
Cell undergoes duplication. done
clear
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question_answer14)
If there are 22 chromosomes in the nucleus of a toad skin cell, a toad egg would contain_____ chromosomes.
A)
22 done
clear
B)
44 done
clear
C)
11 done
clear
D)
33 done
clear
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question_answer15)
Cell division is a normal process in organisms, but sudden and rapid mitosis of cells in an organ may result into:
A)
New organ done
clear
B)
Gastrula done
clear
C)
Zygote done
clear
D)
Cancer done
clear
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question_answer16)
A plant has number of chromosome groups arranged at equatorial plane of metaphase-I whose 2n = 50; the number of chromosomes visible will be:
A)
100 done
clear
B)
25 done
clear
C)
50 done
clear
D)
75 done
clear
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question_answer17)
A drug called colchicine is shown to interfere specially with spindle microtubules formation during mitosis. This would result in:
A)
dehydration of chromosomes done
clear
B)
despiralisation of chromosomes done
clear
C)
arrest of chromosome movements done
clear
D)
arrest of centrioles movements done
clear
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question_answer18)
Chromosomes in salivary gland cells of Drosophila larvae are:
A)
Polytene done
clear
B)
Lampbrush type done
clear
C)
\[\beta -type\] done
clear
D)
Normal type done
clear
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question_answer19)
Crossing over during meiosis occurs at four strand stage. This is proved by the observation that:
A)
rarely all four gametes resulting from a meiotic division could be recombinants. done
clear
B)
usually only two gametes resulting from meiotic division could be recombinants. done
clear
C)
chaismata are seen only at the four strand stage. done
clear
D)
occasionally none of the four gametes resulting from meiosis could be a recombinant. done
clear
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question_answer20)
Meiosis and mitosis differ from each other because in meiosis:
A)
The four nuclei formed are not similar to parental ones. done
clear
B)
Homologous chromosomes pair are exchange parts. done
clear
C)
Number of chromosomes gets halved. done
clear
D)
All of the above done
clear
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question_answer21)
Non-Sister chromatids:
A)
Cross over during prophase I of meiosis. done
clear
B)
Separate during the first meiotic division. done
clear
C)
Are produced during S phase between cell divisions. done
clear
D)
Cross over during prophase II of meiosis. done
clear
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question_answer22)
In some organisms, such as certain fungi and algae, cells undergo mitosis repeatedly without subsequently undergoing cytokinesis. What would result from this?
A)
A decrease in chromosome number. done
clear
B)
Inability to duplicate DNA. done
clear
C)
Division of the organism into many cells, most lacking nuclei. done
clear
D)
Large cells containing many nuclei. done
clear
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question_answer23)
In the diagram, a cell undergoing meiosis
Which one of the diagrams below shows the next stage in the process?
A)
B)
C)
D)
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question_answer24)
Match the column-I and column-II and choose the correct option.
Column-I | Column-I |
A. | Chromosomes in matching pairs are called | I. | Metaphase plate |
B. | In metosis chromosomes is copied and | II. | Homologous |
C. | Precursor for cell wall formation that represents the middle lamella between the wall of two adjacent cells is called | III. | Cell plate |
D. | The plane of alignment of chromosomes at metaphase is called | IV. | Cell divides to give two daughter cells. |
A)
A - II; B - IV; C - III; D - I done
clear
B)
A - IV; B - III; C - I; D - II done
clear
C)
A - I; B - IV; C - II; D - III done
clear
D)
A - III; B - II; C - IV; D - I done
clear
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question_answer25)
At what phase of meiosis there are two cells, each with sister chromatids aligned at the spindle equator?
A)
Anaphase II done
clear
B)
Metaphase II done
clear
C)
Metaphase I done
clear
D)
Anaphase I done
clear
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question_answer26)
Who stated that new cells develop from pre-existing cells?
A)
Remak done
clear
B)
Virchow done
clear
C)
Prevost and Dumas done
clear
D)
Strasburger done
clear
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question_answer27)
One chromosome of a homologous pair carries the genes J and K. The other chromosome of the pair carries the genes j and k at corresponding loci. Crossing over results in exchange of chromosome segments and production of gametes with new combinations of genes. A recombinant type gamete resulting from this crossover might contain
A)
Genes J and K done
clear
B)
Genes j and K done
clear
C)
Genes J and j done
clear
D)
Genes j and k done
clear
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question_answer28)
Chiasmata are formed during meiosis:
A)
Before metaphase I done
clear
B)
after metaphase I done
clear
C)
During prophase II done
clear
D)
during metaphase II done
clear
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question_answer29)
Replication of centriole occurs during:
A)
Early anaphase done
clear
B)
Mid metaphase done
clear
C)
Late metaphase done
clear
D)
Interphase done
clear
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question_answer30)
Recombinant nodules are found during:
A)
Anaphase done
clear
B)
Prophase done
clear
C)
Telophase done
clear
D)
Metaphase done
clear
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question_answer31)
Prophase is longer in:
A)
Mitosis done
clear
B)
Meiosis done
clear
C)
Equal in both done
clear
D)
Amitosis done
clear
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question_answer32)
In telophase of mitosis, the mitotic spindle breaks down and nuclear membranes form. This is essentially the opposite of what happens
A)
Prophase done
clear
B)
Interphase done
clear
C)
Metaphase done
clear
D)
S phase done
clear
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question_answer33)
Centromere is required for:
A)
Movement of chromosomes towards poles done
clear
B)
Cytoplasmic cleavage done
clear
C)
Crossing over done
clear
D)
Transcription done
clear
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question_answer34)
Most cells divide if they receive the proper signal at a checkpoint in the ____ phase of the cell cycle.
A)
M done
clear
B)
\[{{G}_{1}}\] done
clear
C)
S done
clear
D)
\[{{G}_{2}}\] done
clear
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question_answer35)
Which of the following does not lead to genetic variability?
A)
random fertilization done
clear
B)
crossing over during meiosis. done
clear
C)
division of chromosomes during anaphase of mitosis. done
clear
D)
orientation of chromosomes during metaphase I of meiosis. done
clear
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question_answer36)
During pachytene stage of meiosis, the chromosomes appear:
A)
Single stranded done
clear
B)
Four stranded done
clear
C)
Six stranded done
clear
D)
Eight stranded done
clear
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question_answer37)
Which of the following statements related to stage of the cell cycle are correct?
(i) It is a quiescent stage. |
(ii) In this phase, cell cycle is stopped. |
(iii) \[{{G}_{0}}\] cells do not grow or proliferate but metabolically active. |
(iv) go cells can divide in response to some stimulus. |
A)
(i) and (ii) done
clear
B)
(i), (ii) and (iii) done
clear
C)
Only (i) and (iv) done
clear
D)
All of the above done
clear
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question_answer38)
Given below is a schematic break-up of the phases / stages of cell cycle with few parts labelled as 1, 2, 3 & 4.
Which one of the following is the correct indication of the stage/phase in the cell cycle?
A)
3 - Karyokinesis done
clear
B)
4 - Synthetic phase done
clear
C)
1 - Cytokinesis done
clear
D)
2 - Metaphase done
clear
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question_answer39)
Pick out the correct sequence of two main events in mitosis.
A)
Karyokinesis is followed by cytokinesis. done
clear
B)
Cytokinesis is followed by karyokinesis. done
clear
C)
Karyokines is followed by separation of the daughter cells. done
clear
D)
Cytokinesis is followed by separation of the daughter cells. done
clear
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question_answer40)
Cell division in blue green algae is similar to that in:
A)
Bacteria done
clear
B)
Brown algae done
clear
C)
Green algae done
clear
D)
Higher plants done
clear
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question_answer41)
Strasburger is famous for:
A)
discovery of cell division done
clear
B)
proposing the term nucleoplasm done
clear
C)
proposing the term cytoplasm done
clear
D)
All of the above done
clear
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question_answer42)
When synapsis is complete all along the chromosome, the cell is said to have entered a stage called:
A)
Zygotene done
clear
B)
Pachytene done
clear
C)
Diplotene done
clear
D)
Diakinesis done
clear
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question_answer43)
In pachytene stage of meiosis the chromosomes appear:
A)
Single stranded done
clear
B)
Double stranded done
clear
C)
Three stranded done
clear
D)
Four stranded done
clear
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question_answer44)
Choose the event of cell cycle which shows the importance of synapsis and the formation of chiasmata.
A)
An increase in the variation of progeny occurs. done
clear
B)
Reciprocal exchange of chromosomal sections occurs. done
clear
C)
The DNA on homologous chromosomes mix. done
clear
D)
All of the above done
clear
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question_answer45)
Meiosis which occur at the time of spore formation is called.
A)
Zygotic meiosis done
clear
B)
Haplontic meiosis done
clear
C)
Terminal meiosis done
clear
D)
Intermediate meiosis done
clear
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question_answer46)
The cellular structure which disappear during mitosis is:
A)
Plasma membrane done
clear
B)
Nuclear membrane done
clear
C)
Mitochondria done
clear
D)
Nuclear membrane and nucleolus done
clear
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question_answer47)
Mature nerve cells cannot undergo cell division. These cells are probably considered in:
A)
\[{{G}_{2}}-phase\] done
clear
B)
S-phase done
clear
C)
Mitosis done
clear
D)
\[{{G}_{0}}-phase\] done
clear
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question_answer48)
After meiosis - I, the two chromatids of a chromosome are:
A)
Genetically similar done
clear
B)
Genetically different done
clear
C)
There occurs only one chromatid in each chromosome done
clear
D)
None of the above done
clear
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question_answer49)
Fully differentiated cells which do not divide are supposed to be in:
A)
\[{{G}_{1}}-phase\] done
clear
B)
\[{{G}_{2}}-phase\] done
clear
C)
S - phase done
clear
D)
\[{{G}_{0}}-phase\] done
clear
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question_answer50)
A zoologist examined an intestine cell from a crayfish and counted 200 chromosomes, each consisting of 2 chromatids, at prophase I of mitosis. What would he expect to see in each of the four cells at telophase II of meiosis if he looked in the crayfish ovary?
A)
50 chromosomes, each consisting of 2 chromatids done
clear
B)
50 chromosomes, each consisting of 1 chromatid done
clear
C)
100 chromosomes, each consisting of 2 chromatids done
clear
D)
100 chromosomes, each consisting of 1 chromatid done
clear
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question_answer51)
The diagram shows the nuclear contents of a cell.
Which one of the following option is correct?
Number of pairs of homologous chromosomes |
Number of chromatids |
Number of centromeres |
A)
B)
C)
D)
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question_answer52)
Which of the following pair is correctly matched?
A)
B)
C)
D)
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question_answer53)
Meiosis in AaBb will produce gametes:
A)
AB, aB, Ab, ab done
clear
B)
AB, ab done
clear
C)
Aa, bb done
clear
D)
Aa, Bb done
clear
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question_answer54)
Which one of the following list contain the correct order of meiotic events?
A)
Separation of sister chromatids, recombination, formation of the synaptonemal complex, separation of homologous chromosomes. done
clear
B)
Separation of homologous chromosomes, formation of the synaptonemal complex, recombination, separation of sister chromatids. done
clear
C)
Formation of synaptonemal complex, recombination, separation of sisterchromatids, separation of homologous chromosomes. done
clear
D)
Formation of the synaptonemal complex, recombination, separation of homologous chromosomes, separation of sister chromatids. done
clear
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question_answer55)
?Bouquet-stage? occur in which sub stages of prophase I:
A)
Leptotene done
clear
B)
Zygotene done
clear
C)
Pachytene done
clear
D)
Diplotene done
clear
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question_answer56)
Which of the following human cells unlikely to
A)
Nerve cell done
clear
B)
Skin cell done
clear
C)
Cancer cell done
clear
D)
Cell from an embryo done
clear
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question_answer57)
Meiosis takes place in:
A)
Apical meristem done
clear
B)
Intercalary meristem done
clear
C)
Reproductive cells done
clear
D)
Vegetative cells done
clear
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question_answer58)
Which division maintains genetic similarity?
A)
Mitosis done
clear
B)
Meiosis done
clear
C)
Amitosis done
clear
D)
Reduction division done
clear
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question_answer59)
Match the description given in column-I with their stages given in column-II and identify the correct answer.
Column-I | Column-II |
A. | Initiation of the assembly of mitotic spindle | I. | Anaphase |
B. | Proteins are synthesized in preparation for mitosis while cell growth continues. | II. | Prophase |
C. | Spindle fibres attach to kinetochores of chromosomes. | III. | Interphase |
D. | Movement of chromatids towards opposite poles | IV. | Metaphase |
A)
A - II; B - III; C - IV; D - I done
clear
B)
A - III; B - II; C - I; D - IV done
clear
C)
A - I; B - III; C - II; D - IV done
clear
D)
A - IV; B - III; C - I; D - II done
clear
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question_answer60)
When dividing cells are observed under a light microscope, chromosomes become visible in:
A)
Interphase done
clear
B)
S-phase done
clear
C)
Prophase done
clear
D)
\[{{G}_{1}}-phase\] done
clear
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question_answer61)
Which cell division is found during cleavage?
A)
Amitosis done
clear
B)
Mitosis done
clear
C)
Closed mitosis done
clear
D)
Meiosis done
clear
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question_answer62)
If a grasshopper cell contained 200 units of DNA during\[{{G}_{2}}\], what would be the quantity of DNA in one of the grasshopper cells at the end of telophase II of meiosis?
A)
50 units done
clear
B)
100 units done
clear
C)
Between 50 and 100 units done
clear
D)
200 units done
clear
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question_answer63)
If the \[\operatorname{n} =16\] in plant cell then what is possible in metaphase - I of meiosis?
A)
32 bivalents done
clear
B)
16 tetravalents done
clear
C)
16 bivalents done
clear
D)
32 bivalents done
clear
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question_answer64)
During cell division, sometimes there will be failure of separation of sister chromatids. This event is called.
A)
Interference done
clear
B)
complementation done
clear
C)
coincidence done
clear
D)
non-disjunction done
clear
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question_answer65)
During mitosis, after the separation of centromeres, the chromatids move towards opposite poles of the spindle. Name the term used for these chromatids.
A)
Daughter chromosomes done
clear
B)
Kinetochores done
clear
C)
Half spindles done
clear
D)
Centrosomes done
clear
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question_answer66)
Colchicine prevents the mitosis of cells at which of the following stage?
A)
Anaphase done
clear
B)
Metaphase done
clear
C)
Prophase done
clear
D)
Interphase done
clear
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question_answer67)
Number of chromosomes in human karyotype is:
A)
48 done
clear
B)
44 done
clear
C)
46 done
clear
D)
23 done
clear
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question_answer68)
Four different steps that occur during meiosis are given in the following list.
(i). Complete separation of chromatids. |
(ii). Pairing of homologous chromosomes. |
(iii). Lining up of paired chromosomes on equator. |
(iv). Crossing over between chromatids. |
These steps would occur in the order: |
A)
(ii), (iii), (iv), (i) done
clear
B)
(iii), (ii), (iv), (i) done
clear
C)
(ii), (iv), (iii), (i) done
clear
D)
(iii), (i), (ii), (iv) done
clear
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question_answer69)
Each chromosome composed of one chromatid in:
A)
Anaphase - I done
clear
B)
Anaphase - II done
clear
C)
Metaphase - I done
clear
D)
Metaphase - II done
clear
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question_answer70)
In mitosis nucleolus and nuclear membrane disappear at:
A)
Interphase done
clear
B)
Prophase done
clear
C)
Metaphate done
clear
D)
Telophase done
clear
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question_answer71)
What is the number of DNA strand in chromosome at G^ stage of cell cycle?
A)
One done
clear
B)
Two done
clear
C)
Four done
clear
D)
Eight done
clear
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question_answer72)
Homologous chromosomes show maximum attraction during:
A)
Leptotene done
clear
B)
Zygotene done
clear
C)
Pachytene done
clear
D)
Diplotene done
clear
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question_answer73)
Which of the following events not occurs in Anaphase -I?
A)
Segregation of homologous chromosomes done
clear
B)
Contraction in spindle done
clear
C)
Poleward movement of chromosomes done
clear
D)
Division of centromere done
clear
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question_answer74)
Repulsion of homologous chromosomes takes place in:
A)
Zygotene done
clear
B)
Leptotene done
clear
C)
Diakinesis done
clear
D)
Diplotene done
clear
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question_answer75)
How many reduction divisions are necessary for the formation of 200 grains of wheat?
A)
250 done
clear
B)
150 done
clear
C)
200 done
clear
D)
360 done
clear
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question_answer76)
Constancy of the chromosome number in sexually producing generation is brought by the process of:
A)
Meiosis done
clear
B)
Mitosis done
clear
C)
Amitosis done
clear
D)
None of these done
clear
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question_answer77)
Phragmoplast is the precursor of:
A)
Chloroplast done
clear
B)
Chromoplast done
clear
C)
Cell plate done
clear
D)
Leucoplast done
clear
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question_answer78)
In mitosis, duplication of chromosomes occurs during:
A)
Interphase done
clear
B)
Prophase done
clear
C)
Metaphase done
clear
D)
Telophase done
clear
View Solution play_arrow