Biological Classification Test 4 – Important MCQs with Answers for Class 11 Biology 2026
NEET Exam
Biological Classification - Test 3
Biological Classification Test 4 – MCQs with Answers and Explanation
Biological classification is an essential chapter in Class 11 Biology that explains how living organisms are grouped based on similarities and differences. This topic is highly important for board exams and competitive exams like NEET. The following test contains important multiple-choice questions that cover key concepts such as Monera, Protista, fungi, bacteria, and viruses. Practicing these questions will help you improve your conceptual understanding and accuracy.
The first question asks about a eukaryotic unicellular organism. The correct answer is Amoeba because it has a true nucleus and membrane-bound organelles, unlike prokaryotes like Nostoc and Rhizobium. The second question focuses on the main mode of reproduction in bacteria under favorable conditions. The correct answer is binary fission, which is the most common method of asexual reproduction in bacteria.
The third question asks for an incorrect statement about viruses. The correct answer is that viruses contain ribosomes for protein synthesis, which is false because viruses depend on the host cell’s machinery. The fourth question asks for a correct statement about viruses, and the correct answer is that viruses are acellular organisms.
The fifth question tests knowledge of Kingdom Monera and asks for an incorrect statement. The correct answer is that monerans have membrane-bound organelles, which is incorrect because they are prokaryotic. The sixth question highlights a unique feature of fungi. The correct answer is heterotrophic mode of nutrition, as fungi depend on organic matter for food.
The seventh question asks for an example of a saprophytic bacterium. The correct answer is Lactobacillus, which feeds on dead and decaying organic matter. The eighth question is about a characteristic feature of Kingdom Protista. The correct answer is the presence of a true nucleus, as protists are eukaryotic organisms.
The ninth question deals with adaptations in cyanobacteria. The correct answer is heterocysts for nitrogen fixation, which help them survive in aquatic environments by fixing atmospheric nitrogen. The tenth question asks about organisms that show both autotrophic and heterotrophic nutrition. The correct answer is Euglena, which can photosynthesize as well as feed on organic matter.
Overall, this test covers important and frequently asked concepts from biological classification. Regular practice of such MCQs will strengthen your basics and help you perform better in exams. It is always advisable to revise NCERT thoroughly and solve multiple practice questions to gain confidence and accuracy.