Biological Classification — practice questions
201 curated practice questions from Biological Classification (Biology NEET, NTA Exams) — 131 easy, 28 hard, 42 medium. Every question includes the final answer free; step-by-step worked solutions with a free account.
- Which of the following is a DNA containing plant virus [Pb. PMT 1999, 2000]
- The viruses are known as [NCERT Pg. No. 21]
- VAM is important for [Kerala PMT 2000]
- HIV is classified as a retrovirus because its genetic information is carried in:
- Which feature is common to both cyanobacteria and green plants?
- Influenza is caused by [NCERT Pg.No. 20] [BVP 2001]
- Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. STATEMENT - 1…
- Colorless, unicellular, cell wall bound, spherical or rod-shaped micro-organism, lacking organized nucleus is called:
- Algae which serves as a ‘complete whole food’ and contains all essential amino acids in perfect balance, is known as…
- Who discovered an infectious agent that was to be a free RNA of lower molecular weight, it also lacked protein coat…
- Parasitism is a mode of life found in multiple kingdoms. Identify the correct statements: I. Bacteria like…
- Bacteriophage is made up of [CPMT 1994; Pb. PMT 2000] [NCERT Pg. No. 20]
- Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. STATEMENT - 1…
- The first to isolate plant virus was [CBSE PMT 1993] [NCERT Pg. No. 20] Or The Tobacco mosaic virus was crystallized…
- Find the CORRECT statements: Capsomeres form the viral capsid. Plant viruses often have ssRNA. Bacteriophages contain…
- The capsid of tobacco mosaic virus (TMV) has capsomeres numbering [KCET 2000]
- Some blue green algae can be used as biofertilizer as they are [KCET 2002]
- The genetic material in viruses is [NCERT Pg. No. 20] [CPMT 1994; MP PMT 1995, 98, 2000; CBSE PMT 1997; Pb. PMT 2000…
- An extreme example of latency in which DNA of the phage is integrated with the DNA of host cell chromosome is [DPMT…
- A cell coded protein that is formed in response to infection with most animal viruses is called:
- Organisms which obtain energy by the oxidation of reduced inorganic compounds are called:
- Identify the correct statements: I. All fungi classified under Deuteromycetes are strictly parasitic. II. Ascomycetes…
- The enzymes formed by bacteriophage which ruptures the bacterial wall is
- Why are mycoplasmas resistant to antibiotics like penicillin?
- Which of the following statements is wrong for viroids?
- In protozoans like Amoeba and Paramecium , an organelle is found for osmoregulation which is:
- Crown gall disease in plants is caused by [BHU 2005]
- Match the following and choose the correct answer [Kerala PMT 2009]
- The agents which are known to cause CJD are [KCET 2009] [NCERT Pg. No. 21]
- Why are sexual spores absent in Deuteromycetes considered taxonomically important?
- Banana bunchy top is caused by [KCET 2011]
- Virus was assigned its name by [NCERT Pg. No. 20]
- Which of the following shows coiled RNA strand and capsomeres?
- A patient shows symptoms of fever, chills, and vomiting. Microscopic examination of blood reveals unicellular organisms…
- Which feature of Deuteromycetes led to their classification as 'Fungi Imperfecti'?
- The water of Holy Ganga, river is pure due to the presence of [MP PMT 1998]
- Which of the following is false [CBSE PMT 2005; DUMET 2009]
- Which of the following viruses is devoid of protein coat with their body constituted by only RNA [NCERT Pg. No. 21]
- Which of the following is correct about viroids [MHCET 2001; AIEEE Pharmacy 2004; J & K CET 2012; NEET 2020] [NCERT Pg…
- Find the CORRECT statements: Diatomaceous earth forms fossilized deposits. Cyanobacterial blooms deplete aquatic…
- Which of the molecules listed below is a product of fermentation of glucose by yeast [MP PMT 1999; BHU 2008]
- Yeast in an important source of [CPMT 1993; AMU (Med.) 2006]
- Which one of the following is not a nitrogen-fixing organism [NCERT Pg. No. 158]
- Temin worked on which virus [BHU 2000]
- The diagram of a virus is given below. In which of the options A, B and C are correct [NCERT Pg. No. 20]
- Given below are two statements: Statement I : Plants having mycorrhiza has better growth and development. Statement II…
- Examine the figures A, B, C and D. In which one of the four options all the items A, B, C and D are correct? array l…
- Which of the following statements is incorrect [NEET 2019] [NCERT Pg. No. 20]
- Which of the following environmental conditions are essential for optimum growth of Mucor on a piece of bread? A…
- Match List I with List II . Choose the correct answer from the options given below [NEET 2023]
- Find the INCORRECT statements: Diatoms have silica-embedded cell walls. Chrysophytes are exclusively marine…
- Which characteristic best explains why viruses are not placed in any of the five kingdoms?
- Which kingdom includes organisms with peptidoglycan in their cell walls?
- Which group includes organisms without defined nucleus, yet capable of forming colonies and fixing nitrogen?
- Given below are two statements: Statement I: The five-kingdom system of classification cleanly separates all…
- Methanogenic bacteria are not found in [NCERT Pg. No. 154, 155]
- Which of the following organisms cannot be classified into any of the five kingdoms based on Whittaker’s system, and…
- Given below are two statements: Statement I: All protozoans are exclusively free-living organisms that capture their…
- Bacteriophage is similar to fungus [CMC Vellore 1993] [NCERT Pg. No. 20]
- A virion is a [NCERT Pg. No. 21] [Odisha JEE 2009]
- A researcher isolates a unicellular organism that shows both autotrophic and heterotrophic modes of nutrition…
- Which of the following is a disease causing bacterium in human beings?
- Find the INCORRECT statements: Viroids lack protein coats. Prions contain nucleic acids. Viruses are obligate…
- The organism used for alcohol fermentation is [NCERT Pg. No. 152] [CBSE PMT 1995; MP PMT 1997, 98, 2001; Chd. CET 2000…
- The phage which does not destroy the host cell but infects it, is called Or The virus responsible for lysogenic growth…
- A virus containing ssRNA act as a template for DNA synthesis is called as [MP PMT 2007; DPMT 2007; Odisha JEE 2008]
- What makes red tides caused by dinoflagellates harmful to marine ecosystems?
- Genetic material found in Human Immunodeficiency Virus (HIV) is:
- Viruses multiply in [EAMCET 1995; BVP 2001; BHU 2004] [NCERT Pg. No. 19]
- Match List I with List II. Choose the correct answer from the options given below [NEET 2023]
- What feature differentiates euglenoids from typical autotrophic protists?
- In Amoeba, nitrogenous wastes are expelled out through:
- Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion…
- Given below are two statements: Statement I: Algae commonly reproduce vegetatively through the process of…
- Viruses enter plant cells only through.......... [VITEEE 2008]
- After karyogamy followed by meiosis, spores are produced exogenously in [NEET 2018]
- Which one of the following are intracellular obligate parasites [NCERT Pg. No. 20] [KCET 1998; DUMET 2009]
- Given below are two statements: Statement I: The genetic material in all viruses is composed of double-stranded DNA…
- Which of the following organisms belongs to Chrysophytes?
- From the statements given below choose the correct option: I. Coccus is a rod-shaped bacterium. II. Vibrio is a…
- Antibiotic flavicin is obtained from [MP PMT 1999]
- Yield of paddy field can be increased by application of [NCERT Pg. No. 158] [MP PMT 1997; CBSE PMT 1999; BHU 2012]
- The filterable property of tobacco mosaic virus (TMV) was shown by [NCERT Pg. No. 20] [MP PMT 1996]
- Which one of the following enzymes is present in the bacteriophage [MP PMT 1996]
- Contractile vacuole in protozoan Amoeba is meant for:
- Cyanophage is a virus that attacks blue-green algae. In cyanophage the genetic material is:
- Phages that show lysogenic cycle are called [MP PMT 1997; VITEEE 2008]
- Mad cow disease in cattle is caused by an organism which has:
- Given below are two statements: Statement I : The fungi Trichoderma lives as symbiont in the root of trees. Statement…
- The protein coat of virus is called [NCERT Pg. No. 20] [BHU 1999; WB JEE 2009; MP PMT 2009; CBSE PMT (Pre.) 2010]
- Which of the following protists move with the help of pseudopodia?
- Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion…
- Which organisms are primary contributors to oceanic photosynthesis and sediment formation?
- Which one is absent in viruses [AFMC 2008]
- Viruses were called Contagium vivum fluidum by [NCERT Pg. No. 20]
- The rabies virus consists of [WB JEE 2009]
- The bacterium Bacillus thuringiensis is widely used in contemporary biology as [DPMT 2006; WB JEE 2008; CBSE PMT 2009…
- Which of the following statements about methanogens is not correct?
- Find the CORRECT statements: Two-kingdom system merged fungi with plants. Whittaker separated fungi based on nutrition…
- Given below are two statements: Statement I: Free-living bacteria such as Azospirillum and Azotobacter are unable to…
- Plant virus was first crystallized by [NCERT Pg. No. 20] [MP PMT 1994; CPMT 1996]
- Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion…
- Which feature is characteristic of certain dinoflagellates such as Gonyaulax?
- Mycorrhiza does not help the host plant in [NCERT Pg. No. 158]
- Find the CORRECT statements: Fungi act as decomposers. Lichens indicate pollution. Cyanobacteria form blooms…
- Streptomycin is used to cure the diseases caused by the bacteria [MP PMT 1994]
- Which of the following would appears as the pioneer organisms on bare rocks?
- The genome of transducing phages is [JIPMER 2001]
- Bacteria that fix carbon dioxide by using chemical energy as a source are:
- Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion…
- Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. STATEMENT - 1…
- Viruses usually infect the whole plant except the [CBSE PMT 1993; MH CET 2000]
- Phycomycetes can be found in Decaying woods Moist and Damp places Aquatic Habitats Which is correct
- Neomycin is extracted from [EAMCET 1993; MP PMT 2001]
- Which structure in cyanobacteria helps in nitrogen fixation?
- Coliphage T 2 has [AFMC 1997]
- AIDS virus contains or Human immuno deficiency (HIV) virus has protein coat and genetic material which is [MP PMT 1994…
- Algal viruses are known as [CBSE PMT 1993] [NCERT Pg. No. 21]
- Which one of the following pairs is not correctly matched [MP PMT 1993]
- T. O. Diener discovered a:
- Virus was discovered by whom [WB JEE 2009] [NCERT Pg. No. 20]
- Potato tuber spindle disease is caused by [NCERT Pg. No. 21] [MP PMT 2007; DUMET 2009; BHU 2012]
- A bacteria divides every 15 minutes, what will be its growth rate per hour if initially 200 bacteria were present in…
- Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. STATEMENT - 1…
- Which of the following is a nitrogen-fixing cyanobacterium?
- The technique by which virus detection can be made both in plants and animals is known as:
- On the basis of host attacked viruses are classified into [NCERT Pg. No. 19] [MP PMT 1995]
- The part of the virus which gives to it the hereditary feature, is [BHU 1994; BVP 2003]
- In a lake with limited nitrogen availability, which cyanobacterial adaptation gives it a competitive advantage over…
- Which feature is common to both Mycoplasma and viruses, but not to typical bacteria?
- Which statement correctly identifies Phycomycetes and their preferred habitat?
- The correct sequence of events in the sexual reproduction cycle of fungi is: I. Karyogamy II. Plasmogamy III. Meiosis…
- Assertion: Cyanobacteria are photosynthetic blue green algae with all prokaryotic structures. Reason: They are green…
- Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion…
- Match List-I with List-II [NEET 2021] Choose the correct answer from the options given below
- Methanogens do not produce [NCERT Pg. No. 155]
- HIV is classified as a retrovirus because its genetic information is carried in [DUMET 2009, 10] [NCERT Pg. No. 20]
- Which of the following organisms are known as chief producers in the oceans?
- Which of the following is true for viruses [NCERT Pg. No. 20]
- Which of the following shows coiled RNA strand and capsomeres [NCERT Pg. No. 20] [CBSE PMT 2014]
- Choose the correct option regarding Retrovirus [NCERT]
- A single stranded DNA molecule is the genetic material of bacteriophage [BHU 1995, 2000; MHCET 2000; DPMT 2003, 04; BVP…
- Given below is the diagram of a bacteriophage. In which one of the options all the four parts A, B, C and D are correct…
- The new strain of bacteria produced by biotechnology in alcohol industry is [MP PMT 1998, 2006]
- Sometimes when a virus attacks a bacterium, neither the virus multiplies nor the bacterium dies. This phenomenon is…
- A bacteriophage is [MP PMT 1995, 98, 2002, 10, 12; MHCET 2000; Odisha JEE 2009; WB JEE 2010] [NCERT Pg. No. 20]
- Azolla enriches rice fields with nitrogen due to its association with [Wardha 2001 ; Chd. CET 2001; CBSE PMT (Pre.)…
- Given below are two statements: Statement I: Diatomaceous earth, which is used in polishing and filtration, is formed…
- Which statement is wrong for viruses [NCERT Pg.No. 20] [CBSE PMT (Pre.) 2012]
- Assertion : Plasmids are single stranded extra chromosomal DNA. Reason : Plasmids are found in Eukaryotic cells. [NCERT…
- Find the INCORRECT statements: Euglenoids have rigid cell walls. They are exclusively autotrophic. Pellicle provides…
- Azotobacter and Bacillus polymyxa are [NCERT Pg. No. 155] [CBSE PMT 1996]
- Given below are two statements: Statement I: The organism Trypanosoma, a flagellated protozoan, is a free-living…
- Tailed bacteriophages are [CBSE PMT 1995]
- Select the wrong statements [AIPMT 2015] [NCERT Pg. No. 21]
- Which one of the following pairs is not correctly matched [CBSE PMT 2004]
- Ergot, which is an important source of a drug is obtained from [AFMC 1997; AIEEE Pharmacy 2004; Odisha JEE 2005; CBSE…
- Which of the following is wrongly matched in the given table [NCERT Pg. No. 153] [NEET (Phase-I) 2016]
- The change of non-virulent strain of the bacterium into virulent strain is called:
- Given below are two statements: Statement I: In basidiomycetes, the basidiospores are produced exogenously on the…
- What is the primary photosynthetic pigment in cyanobacteria?
- Viruses are non-cellular organisms but replicate themselves once they infect the host cell. To which of the following…
- Genetic material of reovirus is [Kerala CET 2001; Odisha JEE 2004, 11]
- Which of the following statements is not true for retroviruses [CBSE PMT 2004]
- Find the CORRECT statements: Diatom silica walls are indestructible. Pellicle enables euglenoid movement…
- Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion…
- Why are some cyanobacteria able to survive in nitrogen-poor environments?
- Which structural feature directly enables cyanobacteria to float and form surface blooms in polluted water bodies?
- Find the CORRECT statements: Phycomycetes have aseptate mycelium. They reproduce via zygospores. Rhizopus is a…
- Given below are two statements: Statement I: Organisms in Kingdom Animalia store their food reserves in the form of…
- In which virus, DNA is double stranded [AMU (Med.) 2006]
- A protoxin is [NCERT Pg. No. 178]
- From the statements given below choose the correct option: I. Tobacco Mosaic Virus (TMV) has a helical capsid. II…
- Which of the following bacteria is not a source of restriction endonuclease [NCERT; KCET 2018]
- Sir Alexander Flemming extracted penicillin from [NCERT Pg. No. 152] [MP PMT 1993]
- Heterotrophic nutrition is exhibited by organisms across different kingdoms. Identify the correct statements: I. All…
- Which one the following viruse contains both DNA and RNA [WB JEE 2010]
- The causative agent of mad-cow diesase is a [NCERT Pg. No. 21] [CBSE PMT 2006]
- The genome of Influenza virus is a [WB JEE 2016]
- Which of the following statements is wrong for viroids [NCERT Pg. No. 21] [NEET (Phase-I) 2016]
- Which organism supports the theory that viruses are at the border of living and non living?
- Mycorrhiza is a symbiotic association between [NCERT Pg. No. 158] [Pb. PMT 1998; Odisha JEE 2008]
- Tobacco mosaic Virus (TMV) has [NCERT Pg. No. 20] [EAMCET 1993, MHCET 2001; MP PMT 2001; BVP 2002; AIEEE Pharmacy 2004…
- Given below are two statements: Statement I :Fungi specially belonging to genus Glomus form mycorrhiza. Statement II …
- Antibiotics are mostly obtained from [MP PMT 1997; AIEEE Pharmacy 2003]
- Protein of capsomeres is made up of [NCERT Pg. No. 20]
- The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals include the [NCERT…
- The filtrable property of tobacco mosaic virus (TMV) was shown by:
- Which group of protists includes organisms that form spores with resistant walls and have no cilia or flagella in adult…
- From the statements given below choose the correct option: I. Phycomycetes are found in aquatic habitats and on…
- Given below are two statements: Statement I: The coenocytic hyphae found in all fungi are characterized by the presence…
- Which feature best distinguishes cyanobacteria from true bacteria?
- Viruses have [NCERT Pg. No. 20] [J & K CET 2008; CBSE PMT 2014]
- Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion…
- Which one is the smallest among the following
- Satellite RNA are present in some [NEET (Karnataka) 2013]
- Which is correct [NCERT Pg. No. 158] [CBSE PMT 1994; AFMC 1999]
- Viruses that infect bacteria, multiply and cause their lysis, are called [CBSE PMT 2004; AIIMS 2009]
- In phage (plaque) culture [CMC Vellore 1993]
- Decomposers like bacteria and fungi are Autotrophs Chemoautotrophs Heterotrophs Saprotrophs
- Infectious proteins are presents in [NCERT Pg. No. 21] [MP PMT 2007; CBSE PMT (Pre.) 2010]