CBSE Class 11 Biology MCQs Set D

Question. Which of these established that the units of inheritance are located on the chromosome?
(a) Sutton
(b) Waldeyer
(c) Watson and Crick
(d) Strickberger

Answer : A

Question. Which of the following determines the shape of the chromosomes?
(a) chromatids
(b) chromatin material
(c) shape of the centromeres 
(d) position of the centromere

Answer : D

Question. The morphology of the chromosome is best studied during
(a) interphase
(b) prophase
(c) telophase
(d) metaphase

Answer : D

Question. Telocentric chromosomes have centromere located at
(a) one end
(b) both ends
(c) center 
(d) one side

Answer : A

Question. Which of these chromosomes have centromere located at one end?
(a) acrocentric
(b) Telocentric
(c) Metacentric 
(d) Submetacentric

Answer : B

Question. Which of these chromosomes have a very short arm?
(a) Telocentric
(b) Metacentric
(c) Acrocentric 
(d) Submetacentric

Answer : C

Question. Which of the following chromosomes have arms of unequal length?
(a) Telocentric 
(b) Metacentric 
(c) Acrocentric 
(d) Submetacentric

Answer : D

Question. Which of the following types of chromosomes have arms of equal length?
(a) Metacentric
(b) Submetacentric 
(c) Acrocentric 
(d) Telocentric

Answer : A

Question. The total chromosome complement of a cell is called
(a) Karyosome
(b) Karyokinesis
(c) Karyogamy 
(d) Karyotype

Answer : D

Question. DNA and histones together form a structure called
(a) Centromeres 
(b) Nucleosome 
(c) Nucleoplasm 
(d) Centriole

Answer : B

Question. Which of the following number of molecules of various types of histones form Nucleosome?
(a) 8
(b) 10
(c) 16
(d) 20

Answer : A

Question. Which of these studied mitosis in plant cells?
(a) Strassburger
(b) Flemming
(c) Sutton
(d) Waldeyer

Answer : A

Question. Which of these studied mitosis in animal cells?
(a) Strassburger
(b) Flemming
(c) Sutton
(d) Waldeyer

Answer : B

Question. During mitosis the process of cytoplasmic division is called
(a) Cytomeiosis
(b) Cytoplasmosis
(c) Cytokinesis 
(d) Cytomitosis

Answer : C

Question. DNA replication occurs in which phase of the cell cycle?
(a) prophase 
(b) interphase 
(c) metaphase 
(d) Telophase 

Answer : B

Question. Which of the following is part of mitosis in cells of seed plants?
(a) Centrioles
(b) Asters
(c) Spindles 
(d) Cleavage furrows

Answer : C

Question. In plants, meiosis occurs during the formation of:
(a) gametes
(b) seeds
(c) spores
(d) zygote

Answer : C

Question. The prophase I of Meiosis completes in
(a) Two stages
(b) Three stages
(c) Four stages
(d) Five stages

Answer : D

Question. The number of chromosomes in a fertilized egg is:
(a) half as many as in unfertilized egg
(b) the same as in sperm
(c) twice the number as in a sperm
(d) twice the number as in somatic cell

Answer : D

Question. All the somatic cells of a diploid organism originate from a single cell called
(a) gamete
(b) autosome
(c) spore
(d) zygote

Answer : D

Question. If at the end of meiosis, each of the four daughter cells has four chromosomes, how many chromosomes were in the mother cell?
(a) 2
(b) 4
(c) 8
(d) 16

Answer : C

Question. At what phase of meiosis are homologous chromosomes separated?
(a) Prophase I
(b) Anaphase I
(c) Prophase II
(d) Anaphase II

Answer : B

Question. The process by which homologous chromosomes being to pair with each other is called.
(a) chiasma
(b) interkinesis
(c) crossing over
(d) synapsis

Answer : D

Question. The points at which crossing over has taken place between homologous chromosomes are called
(a) Chiasmata
(b) Centromeres
(c) Synapsis
(d) Centrosomes

Answer : A

Question. Crossing over occurs during
(a) leptotene
(b) zygotene
(c) pachytene
(d) diplotene

Answer : C

Question. During what phase of meiosis tetrads are form?
(a) prophase I
(b) prophase II
(c) metaphase I
(d) metaphase II

Answer : A

Question. During what phase of meiosis the nuclear envelop breaks down?
(a) prophase I
(b) metaphase
(c) anaphase I
(d) telophase I

Answer : B

Question. Which of the following is caused by bacteria?
(a) Tetanus
(b) Measles
(c) Malaria
(d) Ringworm
Ans. A

Question. Food can be preserved when pH of the medium is:
(a) acidic
(b) basic
(c) neutral
(d) none of these
Ans. A

Question. They play a role in the making of dairy products:
(a) Viruses
(b) Bacteria
(c) Algae
(d) Plasmodium
Ans. B

Question. Viruses belong to the group:
(a) Prokaryotes
(b) Eukaryotes
(c) Monera
(d) None of these
Ans. D

Question. Common cold is caused by:
(a) Bacteria
(b) Viruses
(c) Fungi
(d) Plasmodium
Ans. B

Question. They fix atmospheric Nitrogen:
(a) Virus
(b) Fungi
(c) Bacteria
(d) Both A & B
Ans. C

Question. In lytic life cycle bacterial cell:
(a) Continues its normal life processes
(b) Bursts and dies
(c) Starts division
(d) Forms endospore
Ans. B

Question. Amino acids are present in the cell wall of:
(a) Bryophytes
(b) Fungi 
(c) Bacteria 
(d) Gymnosperms
Ans. C

Question. Inside photosynthetic bacteria, Chlorophyll is:
(a) Localized in Chloroplast 
(b) Present inside Mitochondria 
(c) Dispersed in the cytoplasm 
(d) Absent
Ans. C

Question. In blue-green algae nitrogen fixation occurs in specialized cells called:
(a) Harmogonia
(b) Akinetes 
(c) Heterocysts
(d) Zygospores
Ans. C

Question. Under ideal condition a bacterial cell divides about every 20 minutes. It takes 200 minutes to fill a culture tube. How much time will it take to fill a test tube of double size. 
(a) 400 minutes 
(b) 220 minutes 
(c) 240 minutes 
(d) 300 minutes
Ans. B

Question. A virus that can reproduce without killing its host is called:
(a) lytic virus
(b) retroactive virus 
(c) temprate virus 
(d) virion
Ans. C

Question. When a bacteriophage, in its lytic phase carries some of the bacterium’s partially digested chromosome with it to another host cell, the process is called:
(a) transformation
(b) transduction
(c) transportation 
(d) conjugation
Ans. B

Question. Which of the following is not true of organisms in the kingdom Monera ?
(a) they reproduce by mitosis
(b) no cellulose cell wall 
(c) no nuclear envelop 
(d) have prokaryotic cellular organization
Ans. A

Question. Slimy capsule of bacteria is made by:
(a) lipid
(b) protein
(c) polysaccharide 
(d) sucrose
Ans.C

Question. Avery and his colleagues confirmed that the transforming material is that:
(a) RNA
(b) DNA
(c) Protein
(d) Lipid
Ans. B

Question. Which of these is found in viruses:
(a) cell membrane
(b) ribosome
(c) nucleic acid
(d) tail and head
Ans. C

Question. Which of the following is a true statement:
(a) viruses carry with them their own ribosome
(b) new viral ribosomes form after viral DNA enters the cell
(c) viruses use the host ribosomes for protein synthesis
(d) none of these
Ans. C

Question. Which of the following is an example of a viral disease:
(a) Tuberculosis
(b) AIDS
(c) Anthrax
(d) Tetanus
Ans. B

Question. The elimination of bacteria from a medium is called:
(a) inoculation
(b) sterilization
(c) staining
(d) fermentation
Ans. B

Question. Bacteria survive unfavourable condition by:
(a) endospore
(b) fission
(c) conjugation
(d) moving
Ans. A

Question. Which of the following is nonliving character of virus?
(a) genetic recombination
(b) mutation
(c) reproduction
(d) crystallization
Ans. D

Question. Which of the following is not a viral disease?
(a) small pox
(b) tetanus
(c) mumps
(d) measles
Ans. B

Question. Polio virus is:
(a) rod-shaped
(b) tadpole shaped
(c) spiral
(d) spherical
Ans. D

Question. Which of the following is a viral disease?
(a) Malaria
(b) Crown gall
(c) Mumps
(d) Pneumonia
Ans. C

Question. Which of the following character of living things is found in vrisues?
(a) respiration
(b) genetic recombination
(c) photosynthesis
(d) all of these
Ans. B

Question. Which of the following is present in the cytoplasm of prokaryotes?
(a) Mitochondria
(b) Ribosome
(c) Endoplasmic reticulum
(d) All of these
Ans. B

Question. Bacterial are haploid organisms because the number of chromosomes in their cells is:
(a) 2
(b) 4
(c) 8
(d) None of these
Ans. D

Question. Which of the following is present in the cytoplasm of bacterial cell?
(a) Glycogen
(b) Protein
(c) Fats
(d) Starch
Ans. D

Question. Cell membrane of bacterial cell invaginates producing structure called:
(a) Polysome
(b) Endosome
(c) Mesosome
(d) Centrosome
Ans. C

Question. The chlorophyll of photosynthetic bacterial is localized in:
(a) nucleus
(b) chloroplast
(c) mitochondria
(d) none of these
Ans. D

Question. For the preparation of food, chemosynthetic bacteria use:
(a) solar energy
(b) chemical energy
(c) nuclear energy
(d) thermal energy
Ans. B

Question. Curing of tobacco involves:
(a) Fungi
(b) Algae
(c) Cyanobacteria
(d) Bacteria
Ans. D

Question. The conversion of atmospheric nitrogen into nitrates by bacteria is called:
(a) Nitrification
(b) Nitrogen fixation
(c) Denitrification
(d) Bacteria
Ans. B

Question. In the retting of flax and hempcellulose fibers are freed by bacteria which decompose:
(a) cellulose
(b) pectin
(c) starch
(d) glycogen
Ans. B

Question. In blue-green algae photosynthesis takes place in:
(a) Chloroplast
(b) Chromoplast
(c) Extensive system of membranes located at the router edge
(d) Mitochondria
Ans. C

Question. Which of the following diseases of plants is caused by bacterial?
(a) Rust
(b) Crowngall
(c) Smut
(d) Powdery mildew
Ans. B

Question. Which of the following is cultivated in rice fields for the increase of soil fertility?
(a) Anabaena
(b) Chlamydomonas
(c) Rhizobium
(d) Rhizopus
Ans. A

Question. Unicellular blue-green algae reproduce by:
(a) fragmentation
(b) conjugation
(c) cell division
(d) hormogonia
Ans. C

Question. Which of the following is enlarged resting cell with thickened walls, large food reserve and DNA?
(a) trichome
(b) hormogonium
(c) ovum
(d) akinete
Ans. D

Question. Which of the following is not true of Nostoc?
(a) Autotroph
(b) Filamentous
(c) Unicellular
(d) Heterocyst
Ans. C

Question Nutrients are returned to the environment by:
(a) producers
(b) decomposers
(c) herbivores
(d) carnovores
Ans. B

Question. Which of the following is caused by bacteria?
(a) chicken pox
(b) leprosy
(c) ring worm
(d) AIDS
Ans. B

Question. In majority of the Fungi the chief component of the cell wall is:
(a) Cellulose
(b) Lignin
(c) Protein
(d) Chitin
Ans. D

Question. Cellulose is absent in the cell wall of most:
(a) Fungi
(b) Algae
(c) Pteredophytes
(d) Bryophytes
Ans. A

Question. The hyphae of Rhizopus are :
(a) Non-septate
(b) Septate
(c) Uninucleate
(d) None of these
Ans. A

Question. Rhizopus is:
(a) Parasite 
(b) Sporophyte 
(c) Tracheophyte
(d) Saprophyte
Ans. D

Question. The spores of Rhizopus are:
(a) Motile
(b) Non-motile
(c) Flagellate
(d) Naked
Ans. B

Question. Which of the following is used in cheese production:
(a) Amanita
(b) Rhizopus
(c) Penecillium 
(d) Neurospora
Ans. C

Question. Smut is caused by:
(a) Bacteria
(b) Virus
(c) Plasmodium
(d) Fungi
Ans. D

Question. Which of the following is a human disease caused by Fungi?
(a) Powdery mildew
(b) Ring worm
(c) Rusts
(d) Downy mildew
Ans. B

Question. Ulva is:
(a) Unicellular
(b) Filamentous
(c) Tubular
(d) None of these
Ans. A

Question. Sexual reproduction in which small male gamete is motile while the large female gamete is immotile is called:
(a) Isogamy
(b) Anisogamy
(c) Oogamy
(d) Karyogamy
Ans. D

Question. Mycorrhiza is association of:
(a) Root-fungus
(b) Stem-fungus
(c) Alga-fungus 
(d) Bacteria-fungus
Ans. A

Question. Mycorrhizal association is:
(a) Parasitic
(b) Symbiotic
(c) Saprophytic 
(d) Chlorophytic
Ans. B

Question. Sporophyte generation produces:
(a) Gametes
(b) Zygote
(c) Embryo
(d) Spores
Ans. D

Question. The chromosome number in the gametes of Ulva is:
(a) Diploid
(b) Triploid
(c) Teraploid
(d) Monoploid
Ans. D

Question. The number of chromosomes in the cells of the Sporophyte plant body of Ulva is:
(a) Diploid
(b) Triploid
(c) Teraploid
(d) Monoploid
Ans. A

Question. Euglena is an animal because it lacks:
(a) Nucleus 
(b) Chloroplast 3
. Cell wall 
(d) Cell membrane
Ans. C

Question. Mycelium is a term used for:
(a) Mass of spores
(b) Mass of sporangia
(c) Mass of hyphae
(d) Zoospores
Ans. C

Question. Root-like hyphae of Rhizopus are called:
(a) Stolon
(b) Sporangiophore
(c) Rhizoids
(d) Rhizophores
Ans. C

Question. Pyrenoid is involved in:
(a) conversion of sugar into starch
(b) Conversion of starch into sugar
(c) Synthesis of protein
(d) Photosynthesis
Ans. A

Question. Stigeoclonium is:
(a) Fresh water unicellular green alga
(b) Fresh water multi cellular blue-green alga
(c) Fresh water multi cellular green alga
(d) Marine multi cellular green alga
Ans. C

Question. Morels and truffles are:
(a) Poisonous
(b) Non-edible
(c) Delicious
(d) None of these
Ans. C

Question. In Rhizopus food is stored in the form of:
(a) starch
(b) glucose
(c) lipid
(d) glycogen
Ans. D

Question. Amanita is:
(a) Useful
(b) Edible
(c) Poisonous
(d) None of these
Ans. C

Question. In which of the following reproductive organs are not surrounded by sterile cells?
(a) Thallophytes
(b) Bryophytes
(c) Pteriodophytes
(d) Spermatophytes
Ans. A

Question. Which of the following lack chlorophyll?
(a) algae
(b) mosses
(c) liverworts
(d) fungi
Ans. D

Question. The saprophytes
(a) live on living organic matter
(b) prepare their own food
(c) live on non-living organic matter
(d) do not need food
Ans. C

Question. Which of the following is not the asexual method of reproduction in fungi?
(a) fragmentation
(b) budding
(c) spore formation
(d) conjugation
Ans. D

Question. Which of the following is common method of asexual reproduction in yeasts?
(a) budding
(b) binary fission
(c) multiple fission
(d) spore formation
Ans. A

Question. Which of the following is included in sexual reproduction?
(a) meiosis
(b) fusion of haploid nuclei
(c) formation of zygote
(d) all of these
Ans. D

Question. The hyphae of Rhizopus are:
(a) without nuclei
(b) Uninucleate
(c) Binucleate
(d) Multinucleate
Ans. D

Question. Which of the following constitute the body of Rhizopus?
(a) Stolon
(b) Sporangiophores
(c) Rhizoids
(d) All of these
Ans. D

Question. Which of the following anchor the Rhizopus and absorb nutrients?
(a) Stolon
(b) Rhizoids
(c) Sporangiophores
(d) None of these
Ans. B

Question. Which of the following form a network over the surface of the food?
(a) stolon
(b) rhizoids
(c) Sporangiophores
(d) All of these
Ans. A

Question. The dome shaped structure formed in the sporangium of Rhizopus is called:
(a) crown
(b) corona
(c) columella
(d) calyptra
Ans. C

Question. Each gametangium in Rhizopus contains:
(a) One nucleus
(b) Two nuclei
(c) Many nuclei
(d) No nucleus
Ans. C

Question. Which of the following is adaptation of fungi for terrestrial mode of life?
(a) production of zoospores
(b) heterotrophic mode of nutrition
(c) presence of cell wall
(d) absence of flagellated spores
Ans. D

Question. Which of the following is not true of zygospore of Rhizopus?
(a) without a wall
(b) has diploid nuclei
(c) has a thick wall
(d) resistant to unfavourable condition
Ans. A

Question. Which of the following has been used extensively in understanding the principles of inheritance?
(a) Rhizopus
(b) Agaricus
(c) Neurospora
(d) Penecillium
Ans. C

Question. Which of the following is edible?
(a) Amanita
(b) Morels
(c) Rhizopus
(d) All of these
Ans. B

Question. Which of the following causes rusts in cereals?
(a) Rhizopus
(b) Penecillium
(c) Puccinia
(d) Neurospora
Ans. C

Question. Which of the following causes smut in wheat?
(a) Phytophthora
(b) Ustilago
(c) Agaricus
(d) Aspergillus
Ans. B

Question. Which of the following diseases is not caused by fungi?
(a) potato blight
(b) fire-blight
(c) powdery mildew
(d) downy mildew
Ans. B

Question. Athletes foot disease in man caused by:
(a) Epidermophyton
(b) Penecillium
(c) Rhizopus
(d) Agaricus
Ans. A

Question. Which of the following is useful activity of fungi?
(a) decomposition of food
(b) causing diseases
(c) recycling nutrient by decomposing organic compounds
(d) destroying of timbers
Ans. C

Question. Which of the following is not present in Chlamydomonas?
(a) cup-shaped chloroplast
(b) eye spot
(c) nucleus
(d) central vacuole
Ans. D

Question. Which of the following is the method of asexual reproduction in Chlamydomonas?
(a) budding
(b) fragmentation
(c) Akinetes formation
(d) Zoospore formation
Ans. D

Question. Meiosis in Stigeoclonium occurs:
(a) before gamete formation
(b) after gamete formation
(c) in the zygote
(d) during zoospore formation
Ans. C

Question. Which of the following genera exhibits an alternation of generations, with haploid and diploid multicellular phase?
(a) Chlamydomonas
(b) Stigeoclonium
(c) Ulva
(d) Euglena
Ans. C

Question. In which of the following multicellular haploid phase alternates with unicellular diploid phase?
(a) Chlamydomonas
(b) Stigeoclonium
(c) Ulva
(d) Euglena
Ans. C

Question. Which of the following statement is true of Fungi Imperfecti?
(a) produce gametes
(b) reproduce sexually
(c) have sexual phase
(d) lack sexual phase
Ans. D

Question. Zygotes of species in the group Thallophyta
(a) do not develop into embryo with in the parent plant
(b) are flagellated
(c) have triploid nuclei
(d) form from the union of diploid cells
Ans. A

Question. Where there is alternation of generation, the diploid multicellular plant is called:
(a) gametophyte
(b) saprophyte
(c) Sporophyte
(d) Parasite
Ans. C

Question. Which of the following is mismatched?
(a) Rhizopus_______ heterotrophic
(b) Pink bread mold ______ Penecillium
(c) Stigeoclonium ______ heterotrichous
(d) Ulva ______ marine
Ans. B

Question. Which of the following is the characteristic of all fungi?
(a) autotrophic
(b) parasitic
(c) saprophytic
(d) heterotrophic
Ans. D

Question. The fusion of two motile dissimilar gametes is called:
(a) Isogamy
(b) Anisogamy
(c) Oogamy
(d) somatogamy
Ans. B

Question. Zygospores are generally absent in a culture of Rhizopus hyphae developed from a single spore due to:
(a) deficiency of nutrients
(b) excess of nutrients
(c) presence of plus and minus strains
(d) abslience of plus and minus strains
Ans. D