WBBSE Class 10 Life Science Chapter 2 Continuity Of Life MCQs

WBBSE Chapter 2 Cell Division And Cell Cycle MCQs

1. Lamarck
2. Fleming
3. Virchow
4. Schleiden

1. The cell’s DNA replicates during G1
2. It consists of mitosis and interphase
3. A cell can remain in g1 for weeks or much longer
4. Most proteins are formed throughout all subphases of interphase

1. Nuclei
2. Chromosomes
3. Cell membranes
4. Vacuoles

Answer: 2. Chromosomes

Read and Learn More WBBSE Class 10 Life Science Multiple Choice Questions

Question 4. The main function of a gene is to

1. Regulate cellular respiration
2. Synthesize proteins & enzymes and guide cell function
3. Assist the metabolism of fat
4. All the above

Answer: 4. All the above

WBBSE Class 10 Life Science Chapter 2 MCQs

Question 5. Which is not a nitrogenous base of DNA?

1. Adenine
2. Guanine (g)
3. Cytosine
4. Uracil(u)

Answer: 4. Uracil(u)

Question 6. Are long thread-like structures made of a DNA molecule and protein.

1. Nuclei
2. Chromosomes
3. Genes
4. RNAs

Answer: 2. Chromosomes

Question 7. Each of our body cells contains pairs of chromosomes.

1. 23
2. 46
3. 11
4. None of the above

Answer: 1. 23

Question 8. The sex chromosomes of human males are

1. XX
2. XY
3. YY
4. ZZ

Answer: 2. XY

Question 9. Pictures of chromosomes arranged in pairs are known as

1. Histogram
2. Chronogram
3. Cardiogram
4. Karyogram

Answer: 4. Karyogram

WBBSE Class 10 Life Science Chapter 2 MCQs

Question 10. Cells with a haploid number of chromosomes are produced by

1. Mitosis
2. Amitosis
3. Meiosis
4. Cell division

Answer: 3. Meiosis

WBBSE Class 10 Life Science Chapter 2 MCQs With Answers

Question 11. The twenty-third pair of chromosomes in man is known as

1. Heterosome
2. Chromatid
3. Autosome
4. Gene

Answer: 1. Heterosome

Question 12. At mitotic metaphase, each chromosome consists of two symmetrical structures called

1. Centrioles
2. Genes
3. Spindle fibers
4. Chromatids

Answer: 4. Chromatids

Question 13. Are v-shaped chromosomes in which the centromere lies in the middle of the chromosome so that the two arms are almost equal.

1. Telocentric
2. Acrocentric
3. Metacentric
4. Sub-metacentric

Answer: 3. Metacentric

Question 14. Secondary constrictions are also called

1. DNA
2. NOR
3. RNA
4. Centromeres

Answer: 2. NOR

WBBSE Class 10 Life Science Chapter 2 MCQs

Question 15. Different types of chromosomes can be recognized by the position of the following separating the two arms

1. Telomeres
2. Micromeres
3. Macromeres
4. Centromeres

Answer: 4. Centromeres

Question 16. Chromatin is composed of DNA, RNA and

1. Gene
2. Nucleic acid
3. Protein
4. All of the above

Answer: 3. Protein

Question 17. Deoxyribose sugar is

1. Pentose
2. Hexose
3. Triose
4. None of the above

Answer: 1. Pentose

Question 18. Chromosomes contain proteins.

1. Histone
2. Peptone
3. Chromatin
4. Ribose

Answer: 1. Histone

Question 19. Regions of the chromosomes containing genes are

1. Euchromatin
2. Chromatin
3. Heterochromatin
4. Centromere

Answer: 1. Euchromatin

Continuity Of Life MCQs For Class 10 Board Exams

Question 20. Cytokinesis refers to

1. Division of nuclei
2. Division of cytoplasm
3. Division of chromosomes
4. Completion of cell division

Answer: 2. Division of cytoplasm

Question 21. In sexual reproduction

1. The chromosome number is reduced during mitosis
2. The zygote is usually haploid
3. Gametes are usually haploid
4. Gametes are usually diploid

Answer: 3. Gametes are usually haploid

Question 22. Microtubules are thick, strong spirals of thousands of subunits known as\

1. Proteins
2. Fibers
3. Spindles
4. Tubulin

Answer: 4. Tubulin

Question 23. Mitochondrial production is also vital for cell division.

1. DNA
2. ATP
3. BMR
4. ADP

Answer: 2. ATP

Question 24. Is also known as reductional cell division.

1. Mitosis
2. Meiosis
3. Amitosis
4. Binary fission

Answer: 2. Meiosis

Question 25. Is the time when a cell will leave the cycle and quit dividing.

1. G₀
2. G₁
3. G₂
4. S

Answer: 1. G₀

Class 10 Life Science Chapter 2 Multiple Choice

Question 26. The chromosome set is

1. The same for all organisms
2. Varies with the age of the organisms
3. Same for all the plants
4. Constant for a given species

Answer: 4. Constant for a given species

Question 27. Mitotic nuclear division is called

1. Cytokinesis
2. Akinesis
3. Karyokinesis
4. Ookinesis

Answer: 3. Karyokinesis

Question 28. Karyokinesis does not include

1. Prophase
2. Metaphase
3. Anaphase
4. Cytokinesis

Answer: 4. Cytokinesis

Question 29. Chromosomes are arranged in the equator of the cell during

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

Answer: 2. Metaphase

Question 30. Crossing over occurs during

1. Meiosis I
2. Meiosis II
3. Amitosis
4. Mitosis

Answer: 1. Meiosis I

MCQs For Continuity Of Life WBBSE

Question 31. Which of the following statements is true?

1. A diploid cell produces four diploid cells in meiosis
2. The chromosome number is reduced to half in daughter cells in mitosis
3. The chromosome number remains the same as the parent cell in meiosis
4. The daughter cell receives both maternal and paternal chromosomes of the homologous pair in meiosis

Answer: 4. The daughter cell receives both maternal and paternal chromosomes of the homologous pair in meiosis

Question 32. During mitosis, each chromosome at the beginning of the prophase is

1. Single-threaded
2. Paired structure
3. Four threaded
4. None of these

Answer: 2. Paired structure

Question 33. In mitotic cell division the

1. The amount of DNA in the daughter cells will be equal to the parent cell
2. The size will be half of the parent cell
3. DNA will be double the parent cell
4. Both (1) & (2)

Answer: 4. Both (1) & (2)

Question 34. Which of the following is true for mitosis?

1. No chiasma formation
2. No crossing over
3. Prophase has no substage
4. All of these

Answer: 4. All of these

West Bengal Board Class 10 Life Science MCQs

Question 35. Identify the pair of nucleotides that are joined by hydrogen bonds in double-stranded DNA.

1. AG & CG
2. TG & CG
3. AT & CG
4. At & TG

Answer: 3. AT & CG

Question 36. Chromosomes do not have a well-defined structure in

1. Interphase
2. Prophase
3. Metaphase
4. Telophase

Answer: 1. Interphase

Question 37. Crossing over is the

1. Exchange of genetic material
2. Deletion of chromosomes
3. Linkage of chromosomes
4. Inversion of chromosomes

Answer: 1. Exchange of genetic material

Question 38. If the number of chromosomes in most body cells of a mammal is 40, the cells in the seminiferous tubule will have

1. 40 Chromosomes
2. 23 Chromosomes
3. 20 Chromosomes
4. 11 Chromosomes

Answer: 3. 20 Chromosomes

Question 39. Chromosomes which have a definite role in sex determination are

1. Lysosomes
2. Allosomes
3. Giant chromosomes
4. Autosomes

Answer: 2. Allosomes

Question 40. Crossing over occurs between

1. Non-sister chromatids of homologous chromosomes
2. Sister chromatids of homologous chromosomes
3. Any chromosomes
4. Sister chromatids of non-homologous chromosomes

Answer: 1. Non-sister chromatids of homologous chromosomes

Question 41. Which of the following is true?

1. Meiosis maintains a constant number of chromosomes in an organism
2. Meiosis provides an opportunity for the exchange of genes
3. Meiosis causes genetic variations among the species
4. All of these

Answer: 4. All of these

Question 42. The characteristic structure called phragmoplast formed during plant cell division is the precursor of

1. Chloroplast
2. Phragmosomes
3. Cell wall
4. Vacuoles

Answer: 3. Cell wall

Question 43. There can not be mitotic division in one of the following cells. Identify the cell

1. Bone cell
2. Sperm
3. Zygote
4. New red blood cells

Answer: 2. Sperm

Question 44. The complete process of meiosis involves

1. One cytoplasmic division with only one chromosome reduction
2. Two cytoplasmic divisions with one reduction of chromosomes
3. Two cytoplasmic divisions with two reductions of chromosomes
4. One cytoplasmic division with two reductions of chromosomes

Answer: 2. Two cytoplasmic divisions with one reduction of chromosomes

Question 45. Amitosis is

1. Division involving the formation of chromosome bridges
2. Division involving spindle formation
3. Division in which chromosomes are unequally distributed
4. Cleavage of the nucleus without recognizable chromosome distribution

Answer: 4. Cleavage of the nucleus without recognizable chromosome distribution

West Bengal Board Class 10 Life Science MCQs

Chapter 2 Topic B Reproduction Review Questions MCQs

Question 46. Bulbil is a modification of

1. Stem
2. Root
3. Leaf
4. Bud

Answer: 4. Bud

Question 47. The animal that reproduces by multiple fission is

1. Amoeba
2. Paramoecium
3. Euglena
4. All of them

Answer: 4. All of them

Question 48. The organism that shows fragmentation is

1. Rhizobium
2. Glocecapsa
3. Oscillatoria
4. Bacillus

Answer: 3. Oscillatoria

Question 49. The most developed artificial propagation method is

1. Grafting
2. Gootee
3. Layering
4. Budding

Answer: 1. Grafting

Question 50. The following animal may develop by parthenogenesis:

1. Queen bee
2. Worker bee
3. Drones
4. Butterfly

Answer: 2. Worker bee

Question 51. The unit of asexual reproduction is

1. Bud
2. Gamate
3. Spore
4. Callus

Answer: 3. Spore

Class 10 Life Science Chapter 2 Important MCQs

Question 52. Which one is related to sexual reproduction?

1. Amitosis
2. Mitosis
3. Budding
4. Meiosis

Answer: 4. Meiosis

Question 53. Production of fruit without fertilization is known as

1. Parthenogenesis
2. Paedogenesis
3. Parthenocarpy
4. Neoteny

Answer: 3. Parthenocarpy

Question 54. Which type of reproduction paves the pathway of evolution?

1. Vegetative reproduction
2. Asexual reproduction
3. Sexual reproduction
4. Parthenogenesis

Answer: 3. Sexual reproduction

Question 55. Which one is not formed due to sexual reproduction?

1. Zoospore
2. Zygospore
3. Oospore
4. Zygote

Answer: 1. Zoospore

Question 56. Yeast reproduces by

1. Fission
2. Budding
3. Both
4. None

Answer: 3. Both

Question 57. The first diploid cell resulting from sexual reproduction is

1. Embryo
2. Zygote
3. Spore mother cell
4. Larva

Answer: 2. Zygote

Question 58. Which one is not an underground stem?

1. Rhizome
2. Tuber
3. Bulb
4. Runner

Answer: 4. Runner

Question 59. Gametes are

1. Haploid
2. Diploid
3. Either haploid or diploid
4. None of them

Answer: 1. Haploid

Question 60. The propagating organ for ginger is

1. Runner
2. Tuber
3. Rhizome
4. Corm

Answer: 3. Rhizome

Class 10 Life Science Chapter 2 Important MCQs

Question 61. The propagating organ for onion is

1. Offset
2. Sucker
3. Bullb
4. Bulbil

Answer: 3. Bullb

Question 62. The gametes that look identical are called

1. Isogamete
2. Anisogamete
3. Oogamete
4. Heterogamete.

Answer: 1. Isogamete

Question 63. The following organism may exhibit spore

1. Amoeba
2. Rhizopus
3. Paramoecium
4. Plasmodium

Answer: 2. Rhizopus

Question 64. The animal that does not show regeneration is

1. Planaria
2. Hydra
3. Ascaris
4. Starfish

Answer: 3. Ascaris

Question 65. Which one of the following methods is not a method of artificial vegetative propagation?

1. Grafting
2. Budding
3. Hybridization
4. Layering

Answer: 3. Hybridization

Question 66. The vegetative method of reproduction adopted for plants with longer seed dormancy is

1. Cutting
2. Layering
3. Budding
4. Grafting

Answer: 4. Grafting

Question 67. The part of the plant which remains close to the ground is

1. Stock
2. Scion
3. Sucker
4. Offset

Answer: 1. Stock

Question 68. Which one of the following reproduces with the help of a leaf?

1. Pteris
2. Oxalis
3. Bryophyllum
4. Banana

Answer: 3. Bryophyllum

Question 69. Which method results in the mixing of features of two separate plants?

1. Layering
2. Grafting
3. Gootee
4. Budding

Answer: 2. Grafting

Question 70. Which one of the following is true for vegetative reproduction?

1. It is both natural and artificial, producing genetically identical plants
2. It is natural
3. It is artificial
4. It is both natural and artificial, producing genetically different plants.

Answer: 4. It is both natural and artificial, producing genetically different plants.

Question 71. The following plant reproduces by vegetative means

1. Banana
2. Oxalis
3. Water hyacinth
4. All of them

Answer: 4. All of them

Question 72. The following hormone induces rooting after cutting

1. IBA
2. IAA
3. GA3
4. Ethylene

Answer: 2. IAA

Class 10 Life Science Chapter 2 Important MCQs

Question 73. The following plant reproduces by root bud

1. Dahlia
2. Sweet potato
3. Both
4. Water hyacinth

Answer: 3. Both

Question 74. Which one of the following processes is related to root induction

1. Cutting
2. Micropropagation
3. Grafting
4. Budding

Answer: 1. Cutting

Question 75. In grafting, the plant part that joins with the stock is called

1. Scion
2. Bud graft
3. Transplant
4. Shoot

Answer: 1. Scion

Question 76. The following plant reproduces with a fleshy root

1. Amanda
2. Dahlia
3. Asparagus
4. All of them

Answer: 4. All of them

Question 77. Potato tuber reproduces with

1. Apical bud
2. Axillary bud
3. Both
4. None

Answer: 3. Both

Question 78. The plant that reproduces by rhizome is

1. Ginger
2. Lotus
3. Turmeric
4. All of them

Answer: 4. All of them

Question 79. The plant that reproduces with Gootee is

1. Mango
2. Guava
3. Lemon
4. All of them

Answer: 4. All of them

Question 80. The animal that reproduces by conjugation is

1. Paramoecium
2. Tapeworm
3. Roundworm
4. Earthworm

Answer: 1. Paramoecium

Question 36. The largest plant production method of vegetative reproduction is

1. Stem cuttings
2. Root cuttings
3. Micropropagation
4. Grafting

Answer: 3. Micropropagation

Life Science Chapter 2 MCQs with Answers Class 10

Question 37. A totipotent cell means

1. An undifferentiated cell capable of developing into a system or entire plant
2. An undifferentiated cell capable of developing into a complete embryo
3. An undifferentiated cell capable of developing into an organ
4. A cell that cannot differentiate into an organ or system

Answer: 1. An undifferentiated cell capable of developing into a system or entire plant

Question 38. Which of the following plant cells show totipotency?

1. Sieve tubes
2. Xylem vessels
3. Meristem
4. Cork cells

Answer: 3. Meristem

Question 39. Asexually produced organisms inheriting all the characteristics of the parent are

1. Offspring
2. Clone
3. Variety
4. Hybrid

Answer: 2. Clone

Question 40. Which is connected to asexual reproduction?

1. Gemmules
2. Gametes
3. Gonads
4. Genitalia

Answer: 1. Gemmules

Question 41. Any cell, tissue, or organ removed from a plant for culturing is called

1. Stock
2. Scion
3. Explant
4. Embryoid

Answer: 2. Scion

Question 42. When two different individuals participate in vegetative reproduction, it is called

1. Cutting
2. Grafting
3. Pollination
4. Layering

Answer: 2. Grafting

Question 43. Parthenogenesis is

1. Development of embryo without fertilization
2. Development of fruit without fertilization
3. Development of fruit without hormone
4. Development of embryo from an egg without fertilization

Answer: 3. Development of fruit without hormone

Question 44. In which of the following modes of asexual reproduction, a mother cell produces innumerable unicellular uninucleate offspring?

1. Fragmentation
2. Multiple fission
3. Sporulation
4. Parthenogenesis

Answer: 2. Multiple fission

Question 45. In oogamy, fertilization involves

1. A large nonmotile female gamete and a small motile male gamete
2. A large nonmotile female gamete and a small nonmotile male gamete
3. A large motile female gamete and a small nonmotile male gamete
4. A small nonmotile female gamete and a large motile male gamete

Answer: 1. A large nonmotile female gamete and a small nonmotile male gamete

Question 46. Why is asexual reproduction sometimes disadvantageous?

1. It allows animals to produce many offspring quickly
2. It produces a genetically uniform population
3. It allows sedentary animals to produce offspring without mates
4. It saves time and energy in gamete formation

Answer: 2. It allows sedentary animals to produce offspring without mates

Life Science Chapter 2 MCQs with Answers Class 10

Question 47. When an animal is cut into pieces, each piece is found to grow into a complex organism. Name the process.

1. Budding
2. Fragmentation
3. Spore formation
4. Regeneration

Answer: 4. Regeneration

Question 48. In grafting contact is made between

1. Phloem
2. Xylem
3. Cambium
4. Flower

Answer: 3. Cambium

Question 49. Which of the following statements supports the view that elaborates sexual reproductive processes appeared much later in the organic evolution?

1. Lower groups of organisms have a simpler body design
2. Asexual reproduction is common in lower groups.
3. Asexual reproduction is common in higher groups of organisms.
4. The high incidence of sexual reproduction in angiosperms and vertebrates.

Choose the correct answer from the given options:

1. 1&3
2. 1&2
3. 2&4
4. 2&3

Answer: 3. 2&4

Question 50. There are various types of reproduction. The type of reproduction adopted by an organism depends on

1. The morphology of the organism
2. The habitat of the organism
3. The morphology and physiology of the organism
4. The habitat, physiology, and genetic makeup of the organism

Answer: 4. The habitat, physiology, and genetic makeup of the organism

Chapter 2 Topic C Sexual Reproduction In Flowering Plants Review Questions MCQs

1. 2
2. 3
3. 4
4. 6

1. Protection
2. Photosynthesis
3. Both
4. None

1. Autogamy
2. Allogamy
3. Geitonogamy
4. Xenogamy

1. Absence of Calyx and corolla
2. Absence of androecium
3. Absence of gynoecium
4. Both 2 & 3

1. Calyx
2. Corolla
3. Androecium
4. Gynoecium

1. Calyx
2. Corolla
3. Androecium
4. Gynoecium

1. Calyx
2. Corolla
3. Androecium
4. Gynoecium

1. Incomplete
2. Unisexual
3. Intersexual
4. Neuter

1. Calyx
2. Corolla
3. Androecium
4. Gynoecium

1. Secretion of nectar
2. Pollination
3. To increase the beauty of the plant
4. Reproduction

1. Rice
2. Mango
3. Orchid
4. Akanda

1. Magnolia
2. Sagittaria
3. Hydrilla
4. Akanda

1. Ovule
2. Embryo
3. Seed
4. Fruit

1. Simul
2. Paddy
3. Kadam
4. Neem

1. Corolla & carpel
2. Calyx & corolla
3. Calyx and gynoecium
4. Androecium & gynoecium

1. Corolla
2. Style
3. Stigma
4. Ovary

1. Cleistogamy
2. Homogamy
3. Herkogamy
4. All of these

1. Superior progeny
2. Weaker progeny
3. Formation of male offspring
4. Formation of seeds

1. 1
2. 2
3. 3
4. 4

1. N
2. 2N
3. 3N
4. 4N

1. Heterogamous
2. Homogamous
3. Dichogamous
4. Cleistogamous

1. Air
2. Water
3. Insects
4. Birds

1. Moths
2. Bees
3. Beetles
4. Butterflies

1. Pollination by birds
2. Pollination by insects
3. Pollination by wind
4. Pollination by water

1. Fusion of male gamete with antipodal cell
2. Fusion of male gamete with secondary nucleus
3. Fusion of male gamete with the egg cell
4. Fusion of one male gamete with the egg cell and another with a secondary nucleus