NEET (UG)

Practice Test 1 — Biological Classification

12 questions • 18 minutes • auto-graded with full solutions

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Section A — MCQ (Single Correct)

Question 1

The five-kingdom system of classification is based on all of the following EXCEPT:

Solution: Whittaker used cell structure, body organisation, nutrition, reproduction and phylogeny — not geography.

Question 2

Heterocysts, the sites of nitrogen fixation, are found in:

Solution: Cyanobacteria fix nitrogen in heterocysts.

Question 3

Which organism is correctly matched with its group?

Solution: Euglena is a euglenoid; Gonyaulax is a dinoflagellate, Plasmodium a sporozoan, Trypanosoma a flagellate.

Question 4

Conidia are the asexual spores of:

Solution: Ascomycetes produce conidia on conidiophores.

Question 5

Mushrooms and rusts belong to the class:

Solution: Agaricus (mushroom) and Puccinia (rust) are Basidiomycetes.

Question 6

The infective constituent of a virus is its:

Solution: Infectivity resides in the viral nucleic acid.

Question 7

Potato spindle tuber disease is caused by a:

Solution: Viroids (free RNA) cause potato spindle tuber disease.

Question 8

In a lichen, the fungal partner provides:

Solution: The mycobiont gives shelter and absorbs water/minerals; the alga makes food.

Section B — Assertion & Reason

Question 9

A: Lichens are good indicators of air pollution.
R: Lichens do not grow in areas polluted with gases such as sulphur dioxide.

Solution: Their inability to grow in polluted air is exactly why they indicate pollution — R explains A.

Question 10

A: Mycoplasmas are resistant to antibiotics that target the cell wall.
R: Mycoplasmas completely lack a cell wall.

Solution: No cell wall means cell-wall-targeting antibiotics have no target — R explains A.

Question 11

A: Euglenoids are considered to bridge plant-like and animal-like nutrition.
R: They are mixotrophic — photosynthetic in light and heterotrophic in darkness.

Solution: Their dual (mixotrophic) nutrition is precisely the reason — R explains A.

Question 12

A: Deuteromycetes are also called fungi imperfecti.
R: Only the sexual stages of these fungi are known.

Solution: A is true, but R is false — only the ASEXUAL/vegetative stages are known, not the sexual.