Biological Classification 1000+ MCQ with answer for SSC GD

1. Dikaryon formation is the characteristic feature of
A. ascomycetes and basidiomycetes.
B. phycomycetes and basidiomycetes.
C. ascomycetes and phycomycetes.
D. phycomycetes and zygomycetes.
Answer : A

2. Match column-I (Characters/feature) with column-II (examples) and choose the correct option.

Column-I	Column-II
(Characters/features)	(Examples)
A. Red dinoflagellates	I. Rhizopus
B. Unicellular fungi used to	II. Gonyaulax make bread and beer
C. Source of antibiotics	III. Yeast
D. Bread mould	IV. Penicillium

A. A III; B II; C I; D IV
B. A II; B III; C I; D IV
C. A II; B III; C IV; D I
D. A II; B IV; C III; D I
Answer : C

3. Refer the given figure of bacteria cell and Nostoc and choose the option which shows correct label for the structure marked as A, B, C, D and E ? 

A. A – Cell wall, B – Cell membrane, C – Heterocyst, D – DNA, E – Mucilagenous sheath
B. A – Cell wall, B – Cell membrane, C – DNA, D – Heterocyst, E – Mucilagenous sheath
C. A – Mucilagenous sheath, B – Cell membrane, C – DNA, D – Heterocyst, E – Cell wall
D. A – Cell membrane, B – Cell wall, C – DNA, D – Heterocyst, E – Mucilagenous sheath
Answer : B

4. Read the following statements and answer the question.
(i) Some members are saprophytes or parasites while a large number of them are decomposers of litter and help in mineral cycling.
(ii) They reproduce only by asexual spores known as conidia.
(iii) Mycelium is septate and branched.
(iv) Alternaria, Colletotrichum and Trichoderma are examples of this class.
Which of the following class of fungi is being described by the above statements ?
A. Phycomycetes
B. Deuteromycetes
C. Basidiomycetes
D. Ascomycetes
Answer : B

5. How many bacteria are produced in four hours if a bacterium divides once in half an hour ?
A. 8
B. 64
C. 16
D. 256
Answer : D

6. Yeast is not included in protozoans but in fungi because
A. it has no chlorophyll.
B. some fungal hyphae grow in such a way that they give the appearance of pseudomycelium.
C. it has eukaryotic organization.
D. cell wall is made up of cellulose and reserve food material is starch.
Answer : B

7. Bacteria are found to be primitive organisms because they
A. are small, microscopic which are not seen with naked eye.
B. cause serious diseases to human being, domesticated animals and crop plants.
C. produce endospores which are very resistant to adverse conditions.
D. possess incipient nucleus and show amitotic division.
Answer : D

8. Why food can be kept for a longer time in cold house than in normal conditions ? Because,
A. insect cannot enter.
B. bacterial multiplication stops.
C. bacterial multiplication is reduced.
D. there is plasmolysis at low temperature.
Answer : C

9. A virus can be considered a living organism because it
A. responds to touch stimulus
B. respires
C. reproduces (inside the host)
D. can cause disease
Answer : C

10. A specimen of fungus is brought by a student for identification. Upon close examination, he discovered that its hyphae are completely septate and it has gills on the underside of the pileus. To which fungal group does it most likely belong ?
A. Basidiomycetes
B. Zygomycetes
C. Ascomycetes
D. Chytrids
Answer : A

11. Which one of the following is a characteristic feature of chrysophytes?
A. They are parasitic forms which cause diseases in animals.
B. They have a protein rich layer called pellicle.
C. They have indestructible wall layer deposited with silica.
D. They are commonly called dinoflagellates.
Answer : C

12. Fungi show asexual reproduction by all of the following kinds of spores except
A. conidia
B. oospores
C. sporangiospores
D. zoospores
Answer : B

13. Which of the following statement is incorrect ?
A. TMV has a double-stranded RNA molecule.
B. Most plant viruses are RNA viruses.
C. The bacteriophage has a double-stranded DNA molecule.
D. Most animal viruses are DNA viruses.
Answer : A

14. The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are the ones categorised as
A. cyanobacteria
B. archaebacteria
C. chemosynthetic autotrophs
D. heterotrophic bacteria
Answer : D

15. Which of the following processes involved in the reproduction of protists ?
A. Binary fission and budding
B. Cell fusion and zygote formation
C. Spore formation and cyst formation
D. All of the above
Answer : D

16. Protozons are not included in kingdom animalia because they are
A. mostly asymmetrical.
B. unicellular eukaryotes.
C. heterotrophic in nature.
D. multicellular prokaryotes.
Answer : B

17. Which of the following statements regarding cyanobacteria is incorrect?
A. It is also called blue green algae.
B. They are chemosynthetic autotrophs.
C. It forms blooms in polluted water bodies.
D. It is unicellular, colonial or filamentous, marine or terrestrial bacteria.
Answer : B