CBSE Class 11 Biology Biological Classification Worksheet Set B

Question. Read the following statements about sexual reproduction in Phycomycetes.
I. In class-Phycomycetes, sexual reproduction produces a resting diploid spore called zygospore.
II. Zygospores are formed by the fusion of two gametes.
III. The gametes are either isogamous or anisogamous.
IV. Based on the mode of sexual reproduction, Phycomycetes are divided into two groups, viz.
Oomycetes and Zygomycetes.
Which of the following statements given above are correct?
(a) I and II
(b) III and IV
(c) I and III
(d) I, II, III and IV
Answer. D

Question. Members of Ascomycetes are decomposers, parasitic/coprophilous and saprophytic.
(a) True
(b) False
(c) Cannot say
(d) Partially true or false
Answer. A

Question. In Basidiomycetes, the vegetative reproduction takes place by
(a) endospore
(b) conidia
(c) akinetes
(d) fragmentation
Answer. D

Question. Deuteromycetes are known as fungi imperfecti because
(a) their zygote undergoes meroblastic and holoblastic cleavage
(b) only asexual stages are known
(c) they have aseptate mycelium
(d) they are autotrophic
Answer. B

Question. Which one of the following matches is correct?
(a) Phytophthora Aseptate mycelium Basidiomycetes
(b) Alternaria Sexual reproduction absent Deuteromycetes
(c) Mucor Reproduction by conjugation Ascomycetes
(d) Agaricus Parasitic fungus Basidiomycetes
Answer. B

Question. Match the following columns.
Column I                    Column II
(Categories)            (Common names)
A. Phycomycetes       1. Algal fungi
B. Ascomycetes         2. Imperfect fungi
C. Basidiomycetes     3. Bracket fungi
D. Deuteromycetes    4. Sac fungi
Codes
     A B C D
(a) 2 1 4 3
(b) 4 3 2 1
(c) 1 4 3 2
(d) 3 2 1 4
Answer. C

Question. Find the incorrect match.
(a) Albugo – Downy mildew
(b) Alternaria – Early blight of potato
(c) Colletotrichum falcatum – Red rot of sugarcane
(d) Phytophthora infestans – Late blight of potato
Answer. A

Question. Hyphae of parasitic fungi is able to penetrate the hard cell wall of its host with the help of
(a) enzymes
(b) hormones
(c) sharp tips
(d) sugar exudates
Answer. A

Question. Which statement stands true for fungi?
(a) They are chlorophyllous
(b) They never form spores
(c) Ectoparasites are non-pathogen
(d) Reproduce both sexually and asexually
Answer. D

Question. Which of the following statements is false for ascomycetes?
(a) Ascomycetes consist of variously pigmented moulds
(b) Thallus of Ascomycetes has aseptate, unbranched hyphae
(c) In Ascobolous sexual reproduction occurs by spermatisation
(d) Process of karyogamy is delayed to start dikaryophase
Answer. B

Question. Fungus producing eight spores in a sac belongs to
(a) Phycomycetes
(b) Ascomycetes
(c) Basidiomycetes
(d) Deuteromycetes
Answer. B

Question. Read the following statements and choose from the options which one(s) is/are true.
I. Lichens constitute just 5% of algal component.
II. Mycobiont is involved in attachment to substratum.
III. Reproduction in case of lichens may by vegetative or sexual.
Codes
(a) I, II and III
(b) I and II
(c) Only II
(d) II and III
Answer. A

Question. Find the correctly matched pair regarding lichens.
(a) Usnea – Usnic acid
(b) Parmelia – Curing epilepsy
(c) Lobaria – Lung disease
(d) All of the above
Answer. D

Question. The term ‘virus’ implies to
(a) cellular
(b) pathogen
(c) parasite
(d) venom or poisonous fluid
Answer. D

Question. Viruses are non-cellular organisms, but replicate themselves once they infect the host cell. To which of the following kindgom viruses belong to?
(a) Monera
(b) Protista
(c) Fungi
(d) None of these
Answer. D

Question. The non-living characteristic of viruses is ability of crystallisation.
(a) True
(b) False
(c) Cannot say
(d) Partially true or false
Answer. A

Question. Observe the diagram and name all the three A, B and C (name of the virus) in correct order.

(a) A-RNA, B-Capsid, C-Tobaccomosaic virus
(b) A-DNA, B-Capsid, C-Bacteriophage
(c) A-RNA, B-Capsomere, C-TMV
(d) A-DNA, B-Capsid, C–Bacteriophage
Answer. A

Question. Match the following columns.
Column I                               Column II
(Scientists)                         (Related to)
A. DJ Ivanowsky (1892)    1. Viroids
B. MW Beijerinck (1898)   2. First crystallised TMV
C. WM Stanley (1935)      3. Contagium vivum fluidum
D. TO Diener (1971)         4. Mosaic disease of tobacco
Codes
     A B C D
(a) 1 4 3 2
(b) 2 1 4 3
(c) 4 3 2 1
(d) 3 2 1 4
Answer. C

Question. Consider the following statements.
I. Viruses that infect plants have single-stranded RNA and viruses that infect animals have either single or double-stranded RNA or doublestranded DNA.
II. Bacterial viruses or Bacteriophages are usually single-stranded RNA viruses.
Choose the correct option.
(a) Statement I is true, but II is false
(b) Statement I is false, but II is true
(c) Both statements I and II are true
(d) Both statements I and II are false
Answer. A

Question. The protein coat of a virus is known as
(a) nucleoid
(b) capsid
(c) capsomere
(d) outer envelope
Answer. A

Question. Which of the following is correct about viroids?
(a) They have free RNA without protein coat
(b) They have DNA with protein coat
(c) They have free DNA without protein coat
(d) They have RNA with protein coat
Answer. B

Question. Difference between virus and viroid is
(a) the absence of protein coat in viroid, but present in virus
(b) the presence of low molecular weight RNA in virus, but absent in viroid
(c) Both (a) and (b)
(d) None of the above
Answer. A

Question. Lichens are mutualistic and symbiotic associations between
(a) mycobiont and virus
(b) mycobiont and phycobiont
(c) mycobiont and root of higher plants
(d) mycobiont and mosses
Answer. B

Question. All eukaryotic unicellular organisms belong to:
(a) Monera
(b) Protista
(c) Fungi
(d) Bacteria
Answer. B

Question. The five kingdom classification was proposed by:
(a) RH Whittaker
(b) C Linnaeus
(c) A Roxberg
(d) Virchow
Answer. A

Question. Organisms living in salty areas are called as:
(a) Methanogens
(b) Halophiles
(c) Heliophytes
(d) Thermoacidophiles
Answer. B

Question. Naked cytoplasm, multinucleated and saprophytic are the characteristics of:
(a) Monera
(b) Protista
(c) Fungi
(d) Slime
Answer. D

Question. An association between roots of higher plants and fungi is called:
(a) Lichen
(b) Fern
(c) Mycorrhiza
(d) BGA
Answer. C

Question. A dikaryon is formed when:
(a) Meiosis is arrested
(b) The two haploid cells do not fuse immediately
(c) Cytoplasm does not fuse
(d) None of the above
Answer. B

Question. Contagium vivum fluidum was proposed by:
(a) DJ lvanowsky
(b) MW Beijernek
(c) Stanley
(d) Robert Hook
Answer. B

Question. Association between mycobiont and phycobiont are found in:
(a) Mycorrhiza
(b) Root
(c) Lichens
(d) BGA
Answer. C

Question. Difference between virus and viroid is:
(a) Absence of protein coat in viroid but present in virus.
(b) Presence of low molecular weight RNA in virus but absent in viroi(d)
(c) Both (a) and (b)
(d) None of the above
Answer. A

Question. With respect to fungal sexual cycle, choose the correct sequence of events.
(a) Karyogamy, Plasmogamy and Meiosis
(b) Meiosis, Plasmogamy and Karyogamy
(c) Plasmogamy, Karyogamy and Meiosis
(d) Meiosis, Karyogamy and Plasmogamy
Answer. C

Question. Viruses are non-cellular organisms, but replicate themselves once they infect the host cell. To which of the following kingdom do viruses belong to?
(a) Monera
(b) Protista
(c) Fungi
(d) None of these
Answer. D

Question. Members of phycomycetes are found in:
(a) Aquatic habitats
(b) On decaying wood
(c) Moist and damp places
(d) As obligate parasites on plants
Choose from the following options.
(a) (A) and (D)
(b) (B) and (C)
(c) (B) and (D)
(d) All of these
Answer. D

Assertion & Reason

Directions: These questions consist of two statements each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.
(a) If both Assertion and Reason are True and the Reason is a correct explanation of the Assertion.
(b) If both Assertion and Reason are True but Reason is not a correct explanation of the Assertion.
(c) If Assertion is True but the Reason is False.
(d) If both Assertion and Reason are False

Question. Assertion: Protozoans are believed to be primitive relatives of animals.
Reason: All protozoans are heterotrophs usually and live as predators or parasites.
Answer. A

Question. Assertion: Deuteromycetes are called as fungi imperfect.
Reason: Only Asexual or vegetative phases of these fungi are known.
Answer. A

Question. Assertion: Pili are surface structure of bacteria but not play a role in motility.
Reason: Pili is made up of pilin protein which is non contractile.
Answer. A

Question. Assertion: Bacteria are the sole members of kingdom monera
Reason: Bacteria have Eukaryotic cellular organization only.
Answer. C

Question. Assertion: Eubacteria photosynthesis is not oxygenic (do not produce oxygen).
Reason: Eubacteria lack PS-II.
Answer. A

Question. Assertion: Neurospora is called as Drosophila of plant kingdom.
Reason: Neurospora is used most extensively inbiochemical and genetic work.
Answer. A

Question. Assertion: Diatomaceous earth is used in polishing, filteration of oil and syrups.
Reason: Diatoms are chief producer in ocean.
Answer. B

Question. Assertion: Species is reproductively isolated natural population.
Reason: Prokaryotes were kept under different species on the basis of reproductive isolation.
Answer. C

Question. Assertion: Dinoflagellates show water bloom.
Reason: Dinoflagellates float with the help of stored foo(d)
Answer. C

Question. Assertion: Azolla increases the production of rice significantly.
Reason: Anabaena are found in the leaves of Azoll(a)
Answer. A

Question. Assertion: Archaebacteria are called ancient bacteri(a)
Reason: Archaebacteria are presently living.
Answer. B

Question. Assertion: Flagellais 11 (Eleven) stranded in protist(a)
Reason: Protista has 9 + 2 arrangement.
Answer. A

Question. Assertion: Slime moulds lack cell wall.
Reason: In reproductive phase, slime moulds contain cell wall.
Answer. B

Question. Assertion: Amoeba contains a contractile vacuole.
Reason: It helps in both digestion and osmoregulation.
Answer. C

Question. Assertion: Malarial fever appear at merozoite stage of Plasmodium.
Reason: The infective stage of Plasmodium is sporozoite.
Answer. A

Question. Assertion: In Paramecium, excess of water is removed from the cytoplasm by means of contractile vacuoles.
Reason: The contractile vaculoes show osmoregulation.
Answer. B

Question. Assertion: Euglena is studied as an animal as well as a plant.
Reason: Euglena is more an animal than a plant.
Answer. A

Question. Assertion: Sporozoans may have silica shells on their surface.
Reason: Shells of sporozoans help in protection from acidic environment of the host.
Answer. D

Question. Assertion: Fungal cellulose or chitin is a polysaccharide.
Reason: It is made of acetyl glucosamine.
Answer. A

Question. Assertion: Flagellation is important in classifying Phycomycetes.
Reason: Flagellation differs from class to class.
Answer. A

Question. Assertion: “Fungi imperfecti” does not show alternation of generation.
Reason: The diploid phase is only present
Answer. C

1 Who proposed two kingdom classification?
2 Name the specialized structure of cyanobacteria helping in fixation of atmospheric nitrogen.
3 Identify the organism causing red tides.
4 List the characteristics chosen for five kingdom classification.
5 Euglena are myxotrophic. Why? Also identify the outer layer of Euglena.
6 What is diatomaceous earth. Write its uses.
7 Name the 4 major groups of protozoans.
8 Describe different types of bacteria.
9 What do you mean by
a) Viroids
b) Bacteriophages
10 Describe the structure of TMV with the help of a diagram.
11 Write a note on Deuteromycetes.
12 What are lichens? Name their components. How are they significant in environmental studies.