Biology MCQ on life processes class 10th, 11th, 12th

Get free access to Multiple Choice Questions on Life Processes in the Biology subject.

In this post, we have written Life processes MCQ of Biology Subject. These Biology MCQs on Life processes are useful for class 10th, 11th, 12th, and others.

Biology MCQs on Life Processes

1. A sudden change in a gene in the gene pool of a population is termed :


 Gene flow

 Genetic drift


2. Identify the correct hierarchical order of taxonomic categories :

 Species, Genus, Family, Class Order, Phylum

 Genus, Species, Order, Family, Class Phylum

 Species, Genus, Family, Order, Class, Phylum

 Phylum, Order, Class, Family, Genus, Species

3. Identify the correctly written Scientific name of human beings :

Haomo Sapiens

Haeomo Sapiens

 Homo Sapiens

Homeo Sapiens

4. In a population if relative frequency of a pain of genes remains constant over generations in the absence of mutation, selection and genetic drift, it is said to follow :

 Principle of Hardy Weinberg Equilibrium

 Theory of origin of species by National selection

 Law of segregation of characters

 Law of independent assortment

5. Industrial melanism in peppered moths can be cited as an example of

(i) Mutation (ii) Natural Selection (iii) Differential reproduction

 (i) only

 (ii) only

 (i) & (ii) only

 (i), (ii) and (iii)

6. Out of the five kingdoms of classification the one to which only prokaryotes belong is :





7. The atmosphere on primitive earth contained apart from Ammonia & Water vapour, the gases.

 Oxygen and Chlorine

Methane and Carbon-dioxide

 Argon and Xenon

 Carbon Monoxide and Nitrogen Oxide

8. The fossil bird Archaeopteryx is considered a connecting link between reptiles and birds because it has :

 Pentadactyl Limbs like buds and reptiles

 Bony tail like reptiles and beak with teeth like birds

 Beak and feathers like birds and teeth and bony tail like reptiles

 Wings like birds and one pain of legs like reptiles

9. Why virus is considered Non-living? Because viruses

(a) Are not made of one or many cells.

(b) Do not have replicative machinery.

(c) Can be crystallized.

A only

 A and B only

 B and C only

 A, B, C

10. Alexander Flaming discovered the antibiotic properties of fungi in the fungus :





11. Bacteria produce antibiotics, are used in setting milk to curd and also fix nitrogen in the soil. Out of (a). Lactobacillus (b). Rhizobium (c). Streptomyces (d). Acetobacters, Which ones fix atmospheric nitrogen?

A only

 C only

 A and C

B and D

12. Choose the incorrect option regarding Fungi :

 Fungi exist as threadlike filaments called Hyphae which form a network called mycelium

 Fungi are saprotrophs and feed on dead organic matter

They reproduce only asexually by flagellate or non flagellate spores.

 Yeasts are single called fungi.

13. Following are the pairs of names of kingdoms and their examples. Identify the incorrect option.

 Monera: Only Bacteria

 Monera: Blue Green algae and Bacteria

 Protoctista: Certain algae and Protozoa

 Fungi: Moulds and Ferns

14. Identify the correct statement regarding the kingdoms Monera, Protictista and Fungi :

 Monera includes only Prokaryotes.

Protictista are unicellular eukaryotes

 Fungi are autotrophic multicellular eukaryotes

 Unicellular organisms are found in Kingdoms Monera, Protictista and Fungi

15. Lichens are a symbiotic combination of :

 Green and blue green algae

 Fungi and green or blue green algae

 Fungi and a Protozoan

 Protozoan and An Alga

16. The cell wall of bacteria is made of :





17 The teacher wished to show the students movement with the help of pseudopodia and cilia. Which protozoans will she need to collect out of the following ?

a. Euglena       b. Amoeba      c. Paramecium        d. Plasmodium

 Euglena Only

 Euglena and Plasmodium

 Plasmodium Only

 Amoeba and Paramecium

18. Which algae have cell walls made of Silica which after their death is left behind and used to line furnaces ?


 Blue Green Algae



19. To which group of bacteria do Methanogenic, Thermoacidophilic and Halophilic bacteria belong ?



 Some to Cyanobacteria and Same to Eubacteria


20. Liverworts and mosses are examples of :





21. Nitrogen-fixing bacteria are found in the roots of leguminous plants like peas and beans. to which family do they belong ?





22. Out of the following vertebrates that can fly, which one also gives birth to young ones and feeds them with milk from mammary glands ?

 Flying Fish



 Flying Lizard

23. The Protochordates, included in Subphylum Urochordata and subphylum cephalochordate are considered so due to presence of three of the following statements choose the wrong one.

 Preference of notochord at some stage of life

 Presence of dorsal tubular nerve and at some stage of life

 Presence of gill shuts at some stage of life

Presence of typical larvae as a stage of life

24. What does the statement, “All Bryophytes show alternation of generation in their life cycles” ?

 There is a gamete producing phase alternating with a spore producing phase

 One generation of adults produce sexually & the next asexually.

 Conjugation is the sexual phase and sporulation asexual phase.

 Male sex organs are antheridia and female sex organ archegonia which alternatively produce gametes.

25. Which is not a true statement about ferns ?

 Main plant body represents a Sporophytic generation

 Leaves are made of leaflets called pinnae

 Sori or groups of sporangia occur under leaves.

 Antheridia and archegonia grow on the same structure

26. Which is the incorrectly matched pair of an animal and the phylum to which it belongs ?

 Earthworm: Arthropoda

 Millipede: Arthropoda

 Leech: Annelida

 Snake: Chordata

27. Which is the phylum in the kingdom Animalia which has no symmetry, cellular grade of organization and only two germ layers ?





28. Which out of the following uses tube feet for its commotion ?


 Star Fish



29. Energy is required in one of the following modes of transport of substances in and out of cell :



 Facilitated Diffusion

Active Transport

30. How many cells with haploid number of chromosomes are formed at the end of Meiosis ?





31. Identify the incorrect statement while comparing prokaryotes with eukaryotes :

 Prokaryotes have a nuclear zone; the nucleoid & Eukaryotes have distinct nucleus

 Double membrane cell organelles in eukaryotes but none in prokaryotes.

 DNA is the genetic material in both

 Only one chromosome in Prokaryotes but one to many in Eukaryotes

32. In which phase of mitosis does the centromere split and the two chromatids become individual chromosomes.





33. In which phase of the cell cycle does each chromosome become made up of two chromatids held by a centromere ?





34. The contractile protein tubulin is found in :



 a, b and c only

 a, b, c and d

35. Which cell organelles possess their own DNA ?

 Mitochondria only

 Chloroplasts only

 Ribosomes only

Mitochondria and Chloroplasts

36. Which one of the following is not present in plant cells ?



 Endoplasmic Reticulum


37. You were to know the sites of light and dark reactions structure of which organelle would you study ?





40. Which statement is not true for Homologous Chromosomes ?

 They are present in pairs

 They form bivalents during zygotene

 They are present as ‘tetrads’ at Pachytene

 Crossing over takes place between both inner and outer chromatids of a homologous pair.

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