17 NEET Biology previous year questions on Biological Classification — options free on every question; 2 include the answer & explanation free, the rest unlock with PYQ Pass.
Q1 FREE PREVIEW
PYQ
BGA (blue green algae) are included in which of the following groups?
aDeuteromycetes
bProkaryotes
cProtista
dFungi
✓ Correct answer: b) Prokaryotes
Explanation✅ Correct Answer: B) Prokaryotes Explanation: BGA (Blue-Green Algae), also known as Cyanobacteria, are prokaryotic organisms.They lack a true nucleus and are classified as bacteria.Despite performing photosynthesis, similar to plants, they are still classified as prokaryotes because they lack membrane-bound organelles.Why other options are incorrect?(A) Deuteromycetes – These are fungi and are not related to cyanobacteria.(C) Protista – Cyanobacteria are not eukaryotes like Protista; they are prokaryotic.(D) Fungi – Fungi are separate from bacteria, and cyanobacteria are not fungi.Thus, BGA (Blue-Green Algae) are included in the group of Prokaryotes.
Q2 FREE PREVIEW
PYQ
Maximum nutritional diversity is found in the group
afungi
banimalia
cmonera
dplantae
✓ Correct answer: c) monera
Explanation✅ Correct Answer: C) Monera Explanation: Kingdom Monera (Bacteria) exhibits the maximum nutritional diversity because bacteria have evolved multiple modes of obtaining nutrition.They can be:1. Autotrophic Bacteria (Make their own food) Photoautotrophic – Use sunlight for energy (e.g., Cyanobacteria like Anabaena and Nostoc).Chemoautotrophic – Use chemical energy for synthesis (e.g., Nitrosomonas, Nitrobacter).2. Heterotrophic Bacteria (Depend on other sources for food) Saprophytic – Decomposers that break down dead organic matter (e.g., Pseudomonas).Parasitic – Live inside a host and cause diseases (e.g., Mycobacterium tuberculosis).Symbiotic – Live in mutual association with plants/animals (e.g., Rhizobium in leguminous plants).Why Other Options Are Incorrect? ❌ A) Fungi – Mostly heterotrophic, either saprophytic or parasitic. ❌ B) Animalia – Strictly heterotrophic, consuming other organisms. ❌ D) Plantae – Mostly photoautotrophic, using photosynthesis.Thus, Monera (Bacteria) has the greatest diversity in nutritional modes!
Q3
PYQ
Which one of the following is not a criterion for classification of fungi?
aFruiting body
bMorphology of mycelium
cMode of nutrition
dMode of spore formation
🔒
Answer & explanation — PYQ Pass
Options are free to see. Unlock the correct answer and full explanation with Pass.
Unlock · ₹149
Q4
PYQ
Ciliates differ from all other protozoans in
ausing flagella for locomotion
bhaving a contractile vacuole for removing excess water
cusing pseudopodia for capturing prey
dhaving two types of nuclei
🔒
Answer & explanation — PYQ Pass
Options are free to see. Unlock the correct answer and full explanation with Pass.
Unlock · ₹149
Q5
PYQ
Which among the following is not a prokaryote?
aSaccharomyces
bMycobacterium
cNostoc
dOscillatoria
🔒
Answer & explanation — PYQ Pass
Options are free to see. Unlock the correct answer and full explanation with Pass.
Unlock · ₹149
Q6
PYQ
Symbiotic association between fungi and algae are called:
[Re-NEET 2026]
a
lichens
b
sponges
c
mycorrhiza
d
chrysophytes
🔒
Answer & explanation — PYQ Pass
Options are free to see. Unlock the correct answer and full explanation with Pass.
Unlock · ₹149
Q7
PYQ
Which of the following is not a prokaryote?
[Re-NEET 2026]
a
Bacteria
b
Blue green algae
c
Mycoplasma
d
Fungi
🔒
Answer & explanation — PYQ Pass
Options are free to see. Unlock the correct answer and full explanation with Pass.
Unlock · ₹149
Q8
PYQ
The main criteria used for Five Kingdom Classification proposed by R.H. Whittaker (1969) included :
A. Cell structure
B. Body organization
C. Presence of flagellum
D. Reproduction
E. Phylogenetic relationships
Choose the correct answer from the options given below :
[NEET 2026]
a
A, B, D and E only
b
A, B, C, D and E
c
A, B and E only
d
B, C and D only
🔒
Answer & explanation — PYQ Pass
Options are free to see. Unlock the correct answer and full explanation with Pass.
Unlock · ₹149
Q9
PYQ
Each of the following characteristics represent a Kingdom proposed by, Whittaker. Arrange the following in increasing order of complexity of body organization. A. Multicellular heterotrophs with cell wall made of chitin. B. Heterotrophs with tissue/organ/organ system level of body organization. C. Prokaryotes with cell wall made of polysaccharides and amino acids. D. Eukaryotic autotrophs with tissue/organ level of body organization. E. Eukaryotes with cellular body organization. Choose the correct answer from the options given below:
[NEET 2025]
a
A, C, E, D, B
b
C, E, A, B, D
c
A, C, E, B, D
d
C, E, A, D, B
🔒
Answer & explanation — PYQ Pass
Options are free to see. Unlock the correct answer and full explanation with Pass.
Unlock · ₹149
Q10
PYQ
Match List I with List II
List I
List II
A. Rhizopus
I. Mushroom
B. Ustilago
II. Smut fungus
C. Puccinia
III. Bread mould
D. Agaricus
IV. Rust fungus
Choose the correct answer from the options given below:
[NEET 2024]
a
A-IV, B-III, C-II, D-I
b
A-III, B-II, C-IV, D-I
c
A-I, B-III, C-II, D-IV
d
A-III, B-II, C-I, D-IV
🔒
Answer & explanation — PYQ Pass
Options are free to see. Unlock the correct answer and full explanation with Pass.
Unlock · ₹149
Q11
PYQ
Which one of the following is not a criterion for classification of fungi?
[NEET 2024]
a
Fruiting body
b
Morphology of mycelium
c
Mode of nutrition
d
Mode of spore formation
🔒
Answer & explanation — PYQ Pass
Options are free to see. Unlock the correct answer and full explanation with Pass.
Unlock · ₹149
Q12
PYQ
Match List-I with List-II :
List I – Organisms
List II – Mode of Nutrition
A. Euglenoid
I. Parasitic
B. Dinoflagellate
II. Saprophytic
C. Slime mould
III. Photosynthetic
D. Plasmodium
IV. Switching between photosynthetic and heterotrophic mode
Choose the correct answer from the options given below:
[Re-NEET 2024]
a
A-III, B-IV, C-II, D-I
b
A-IV, B-II, C-I, D-III
c
A-IV, B-III, C-II, D-I
d
A-IV, B-II, C-III, D-I
🔒
Answer & explanation — PYQ Pass
Options are free to see. Unlock the correct answer and full explanation with Pass.
Unlock · ₹149
Q13
PYQ
Which one of the following is not a criterion for classification of fungi?
a
Fruiting body
b
Morphology of mycelium
c
Mode of nutrition
d
Mode of spore formation
🔒
Answer & explanation — PYQ Pass
Options are free to see. Unlock the correct answer and full explanation with Pass.
Unlock · ₹149
Q14
PYQ
Match List-I with List-II :
List I – Organisms
List II – Mode of Nutrition
A. Euglenoid
I. Parasitic
B. Dinoflagellate
II. Saprophytic
C. Slime mould
III. Photosynthetic
D. Plasmodium
IV. Switching between photosynthetic and heterotrophic mode
Choose the correct answer from the of below:
[Re-NEET 2024]
a
A-III, B-IV, C-II, D-I
b
A-IV, B-II, C-I, D-III
c
A-IV, B-III, C-II, D-I
d
A-IV, B-II, C-III, D-I
🔒
Answer & explanation — PYQ Pass
Options are free to see. Unlock the correct answer and full explanation with Pass.
Unlock · ₹149
Q15
PYQ
Which of the following is incorrect about Cyanobacteria?
[Re-NEET 2020]
a
They lack heterocysts
b
They often form blooms in polluted water bodies
c
They have chlorophyll 'a' similar to green plants
d
They are photoautotrophs
🔒
Answer & explanation — PYQ Pass
Options are free to see. Unlock the correct answer and full explanation with Pass.
Unlock · ₹149
Q16
PYQ
Which of the following is correct about viroids?
[NEET 2020]
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 & explanation — PYQ Pass
Options are free to see. Unlock the correct answer and full explanation with Pass.
Unlock · ₹149
Q17
PYQ
Which of the following statements is correct?
[NEET 2021]
a
Fusion of protoplasms between two motile or non- motile gametes is called plasmogamy.
b
Organisms that depend on living plants are called saprophytes.
c
Some of the organisms can fix atmospheric nitrogen in specialized cells called sheath cells.
d
Fusion of two cells is called Karyogamy.
🔒
Answer & explanation — PYQ Pass
Options are free to see. Unlock the correct answer and full explanation with Pass.
Unlock · ₹149
Practice more NEET Biology PYQs
Browse every Biology chapter, or explore the full NEET question bank.