Students of class 11 Biology should refer to MCQ Questions Class 11 Biology Biological Classification with answers provided here which is an important chapter in Class 11 Biology NCERT textbook. These MCQ for Class 11 Biology with Answers have been prepared based on the latest CBSE and NCERT syllabus and examination guidelines for Class 11 Biology. The following MCQs can help you to practice and get better marks in the upcoming class 11 Biology examination

Chapter 2 Biological Classification MCQ with Answers Class 11 Biology

MCQ Questions Class 11 Biology Biological Classification provided below have been prepared by expert teachers of grade 11. These objective questions with solutions are expected to come in the upcoming Standard 11 examinations. Learn the below provided MCQ questions to get better marks in examinations.

Question. New name of Blue green algae:
(a) Chlorella
(b) Spirulina
(c) Cyanobacteria
(d) None of these

Question. Which of the following is aerobic in nature?
(a) Halophiles
(b) Methanogens
(c) Thermoacidophiles 
(d) None of these

Question. Colonies of Eubacteria is surrounded by
(a) Polysaccharide sheath
(b) Gelatinous sheath
(c) Mucous sheath
(d) None of these

Question. Which of these is a bacterial disease?
(a) Chlorella
(b) Measles
(c) Citrus canker
(d) Both (a) & (c)

Question. Mycoplasma is:
(a) Insensitive to penicillin, sensitive to tetracycline
(b) Insensitive to tetracycline, sensitive to penicillin
(c) Sensitive to both penicillin & tetracycline
(d) None of these

Question. Which type of plasmid contains Antibiotic resistance gene?
(a) “R”- factor
(b) “S”- factor
(c) “G” – factor
(d) “r” – factor

Question. Ray fungi is a/an
(a) Eubacteria
(b) Algae
(c) Flower
(d) Fungi

Question. Pigment present in cynobacteria is the
(a) r – phycocyanin
(b) r – phycoerythrin
(c) c – phycocyanin
(d) Anthocyanins

Question. Which one of the following sets includes the bacterial diseases?
(a) Diptheria, Leprosy, Plague
(b) Tetanus, Tuberculosis, Measles
(c) Malaria, Mumps, Poliomyelitis
(d) Cholera, Typhoid, Mumps

Question. A Dutch scientist A.V. Leeuwenhoeck discovered bacteria for the first time in:
(a) Soil
(b) Rain water
(c) Air
(d) Garden soil

Question. In cyanophyceae, flagella are:
(a) Present in zoospores only
(b) Present
(c) Present in gamete stage only
(d) Absent

Question. Diphtheria is caused by:
(a) Diplococcus
(b) Bacillus
(c) Corynebacterium
(d) Vibrio

Question. Currently bacteria are included in:
(a) Thallophyta
(b) Monera
(c) Mycota
(d) Protista

Question. Bacteria lack alternation of generations because there is:
(a) No exchange of genetic material
(b) Distinct chromosomes are absent
(c) No conjugation
(d) Neither syngamy nor reduction division

Question. In fungi when the hyphae are continuous and branched tubes and fibled with multinucleated  cytoplasm, these are called :-
(a) Unicellular hyphae
(b) Coenocytic hyphae
(c) Multicellular hyphae
(d) Both a and c

Question. Mycelium of members of phycomycetes is :-
(a) Septate and coenocytic
(b) Aseptate and coenocytic
(c) Septate and multicellular
(d) Septate and unicellular

Question. Which are chief producers of oceans ?
(a) Diatoms
(b) Dinoflagellates
(c) Euglenoid
(d) Green algae

Question. Euglenoids have a protein rich layer instead of a cell wall. This layer is called as :-
(a) Epidermis
(b) Skin
(c) Pellicle
(d) Middle layer

Question. Virus is a connecting link between living and non living organisms, when it attack on plant, Which among the following donot appear
(a) Gall formation
(b) Mosaic formation
(c) Leaf rolling and curling
(d) Yellowing and vein clearing

Question. Find out the wrong statement about kingdom fungi proposed by Whittaker :
(a) Eukaryotic organism
(b) Chitinous cell wall
(c) Multicellular with well distinct tissue system
(d) Heterotrophic (saprophytic or parastic) mode of nutrition

Question. Which group shows the most extensive metabolic diversity ?
(a) Plantae
(b) Animalia
(c) Monera
(d) Fungi

Question. Which one of the following statement is true about bacteriophages ?
(a) They are generally single stranded RNA viruses.
(b) They are generally double stranded DNA viruses
(c) They are generally single stranded DNA viruses.
(d) They are generally double stranded RNA viruses

Question. Which of the following is not applicable on phycomycetes :
(a) Obligate parasites on plants
(b) Found in moist and damp places
(c) Septate, Coenocytic mycelium
(d) Endogenously produced spores

Question. In kingdom plantae, alternation of generation is not associated with
(a) Sporophytic and gametophytic phase
(b) Length of haploid & diploid phases
(c) Number of haploid and diploid phases
(d) Freeliving or dependent nature of haploid & diploid phases

Question. Which among the following was not the criteria for classification of organisms into 5 kingdoms proposed by Whittaker ?
(a) Complexity of cell
(b) Phylogenetic relationship
(c) Mode of nutrition
(d) Metabolism

Question. In deprived of sunlight which group of protista behave like heterotrophs by predating on other smaller organisms :-
(a) Slime moulds
(b) Protozoans
(c) Euglenoids
(d) Dinoflagellates

Question. Cell wall of diatoms are embedded with :-
(a) Calcium oxylate crystals
(b) Silica particles
(c) Iron
(d) Calcium carbonate crystals

Question. Which is not found in members of deuteromycetes ?
(a) Asexual reproduction
(b) Mode of nutrition
(c) Structure of mycelium
(d) Sexual reproduction

Question. Which group of organisms is responsible for the production of biogas from the dung of cows and buffaloes ?
(a) Methanomonas
(b) Methanogens
(c) Cyanobacteria
(d) Mycoplasma

Question. Majority of members of deuteromycetes are
(a) Autotrophs
(b) Parasites
(c) Decomposers
(d) Symbiotic

Question. Choose the incorrect statement regarding Mycoplasma :-
(a) They lack cell wall
(b) They are smallest living cell
(c) They can survive without oxygen
(d) They have mesosome for respiration

Question. In fungi sexual reproduction is by :-
(a) Fragmentation, Ascospores and Basidiospores
(b) Budding, Conidia, and Basidiospores
(c) Oospores, Ascospores and Basidiospores
(d) Fission, Zoospores, Oospores

Question. Which disease is not caused by a fungus ?
(a) Late blight of potato
(b) Black rust of wheat
(c) Red rust of pea
(d) Ergot of rye

Question. In five kingdom classification of Whittaker, all prokaryotic organism were grouped together under kingdom monera. Among the following statements findout incorrect for Bacteria :
(a) Bacteria are gouped under four groups based on their shape
(b) They are simple in structure, but complex in behaviour
(c) They show most extensive metabolic diversity 
(d) The vast majority of bacteria are autotrophs

Question. Nostoc can fix atmospheric nitrogen in specialised cell, called :-
(a) Harmocyst
(b) Harmogonium
(c) Heterocyst
(d) Akinete

Question. Basis of classification according to Whittaker
(a) Cell structure
(b) Mode of reproduction
(c) Phylogenetic relationship
(d) All of these

Question. Which of the following there is no mention in Whittaker’s classification?
(a) Virus
(b) Viroids
(c) Lichens
(d) All of these

Question. Which of the following organisms were never included in Protista?
(a) Bacteria
(b) Red algae
(c) Slime moulds
(d) Mosses

Question. Whittaker is famous for :-
(a) Two kingdom classification
(b) Four kingdom classification
(c) Five kingdom classification
(d) Distinguishing in Bacteria & blue gree Algae

Question. Peptidoglycan / Murein is present in the cell wall of
(a) Animals
(b) Plants
(c) Fungi
(d) Bacteria

Question. Streptococcus is used in preparation of:
(a) Wine
(b) Cheese
(c) Idli
(d) Bread

Question. Murein does not occur in the wall of:
(a) Blue green algae
(b) Nostoc
(c) Eubacteria
(d) Diatoms

Question. Infection of Entamoeba histolytica is prevented by:
(a) Uncontaminated food
(b) Avoiding clothes of patient
(c) Avoiding kissing
(d) None of the above

Question. Euglena stores food as:
(a) Paramylum
(b) Starch
(c) Fat
(d) Protein

Question. What is not true of Euglena?
(a) Presence of cellulose cell wall
(b) Presence of proteinaceous pellicle
(c) Presence of chlorophyll
(d) Presence of flagellum

Question. Red tides are caused by
(a) Red algae
(b) Brown algae
(c) Golden algae
(d) Fire algae

Question. Primitive relatives of animals:
(a) Protozoans
(b) Bacteria
(c) Algae
(d) Humans

Question. Passive food ingestion in Amoeba is known as
(a) Import
(b) Invagination
(c) Circumfluence
(d) Circumvallation

Question. When a fresh water protozoan, possessing a contractile vacuole is placed in a glass containing marine water, the vacuole will?
(a) Disappear
(b) Increase in number
(c) Increase in size
(d) Decrease in size

Question. Nutrition in Amoeba is:
(a) Holophytic
(b) Holozoic
(c) Parasitic
(d) Saprobic

Question. Protists obtain food as:
(a) Holotrophs
(b) Photosynthesisers
(c) Chemosynthesisers
(d) Photosynthesisers, symbionts and holotrophs

Question. Entamoeba histolytica excretes through:
(a) Food vacuole
(b) Contractile vacuole
(c) General surface
(d) Malpighian tubules

Question. Seeding ponds with Gambusia fish is an example of:
(a) Parasitism
(b) Biocontrol
(c) Hyperparasitism
(d) Both (a) and (b)

Question. Spraying kerosene on stagnant water shall kill Anopheles due to:
(a) Burning of body wall
(b) Prevention of spiracle to come in contact with air
(c) Diffusion into body
(d) Entry into and blocking of respiratory tract

Question. Certain stages of Plasmodium vivax may survive for a long time in liver of man in dormant state. On reactivation they enter into cycle, this stage is known as:
(a) Exoerythocytic schizogony
(b) Cycle of Ross
(c) Gametogony
(d) Erythrocytic schizogony

Question. A protein rich layer which makes the body of Euglenoids flexible is called
(a) Pellicle
(b) Murein
(c) Cellulose plate
(d) Pseudopodia

Question. Trypanosoma brucei produces:
(a) A disease of animals
(b) Kala-azar
(c) Dysentery
(d) Sleeping sickness

Question. Trichonympha is a symbiont in alimentary canal of:
(a) Termite
(b) Snails
(c) Hermit Crab
(d) Earthworm Fungi

Question. Quinine is got from bark of:
(a) Cinchona officinalis
(b) Ferula asafoetida
(c) Curcuma domestica
(d) Atropa belladona

Question. From which of the following most of the antibiotics are prepared?
(a) Fungi
(b) Plants
(c) Actinomycetes
(d) Archaebacteria