Free Biological Classification (Weekly Quiz: 1) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

What are the sex organs provided in some bacteria?

(a) Circular DNA

(b) Sex pili

(c) Plasmid

(d) Gametes

Question-2

Which one of the following living organisms completely lacks a cell wall?

(a) Saccharomyces

(b) Cyanobacteria

(c) Sea-fan (Gorgonia)

(d) Blue-green algae

Question-3

What is true for cyanobacteria?

(a) Oxygenic without nitrogenase

(b) Oxygenic with nitrogenase

(c) Non oxygenic with nitrogenase

(d) Non oxygenic without nitrogenase

Question-4

Which of the following is correct about the slime mould ?

1. Its thalloid body, Plasmodium has pseudopodia for locomotion and engulfing organic matter.
2. During unfavourable conditions Plasmodium differentiates and produces fruiting bodies, sporangium.
3. Spores posses no true cell wall.
4. They are dispersed by air current.
5. Being extremely resistant, spores survive for many years.
6. Plasmodium can grow upto several feet.

Choose the answer from the following options

(a) (1),(2) and (3)

(b) (1),(2), (4), (5) and (6)

(c) (1),(2), (3) and (6)

(d) (2),(3) and (6)

Question-5

A few organisms are known to grow and multiply at temperatures of 100-105°C. They belong to

(a) hot-spring blue-green algae (cyanobacteria)

(b) marine archaebacteria

(c) thermophilic sulphur bacteria

(d) thermophilic, subaerial fungi

Question-6

The imperfect fungi which are decomposers of litter and help in mineral cycling belong to:

(a) Phycomycetes

(b) Basidiomycetes

(c) Ascomycetes

(d) Deuteromycetes

Question-7

Which statement is correct for bacterial transduction?

(a) Bacteria obtained its DNA directly

(b) Transfer of some genes from one bacteria to another bacteria through virus

(c) Transfer of genes from one bacteria to another bacteria by conjugation

(d) Bacteria obtained DNA from other external source

Question-8

Azotobacter and Bacillus polymyxa are the examples of

(a) ammonifying bacteria

(b) symbiotic nitrogen-fixers

(c) non-symbiotic nitrogen-fixers

(d) disease-causing bacteria

Question-9

Assertion:
All single called eukaryotes reproduce by asexual means only placed under kingdom Protista.
Reason:
Protistan cell contain well defined nucleus but not membrane bound cell organelles.

(a) If both the assertion and reason are true but the reason is not a correct explanation of the assertion.

(b) If both the assertion and the reason are true and the reason is a correct explanation of the assertion.

(c) If the assertion is true but the reason is false.

(d) If both the assertion and reason are false.

Question-10

Kingdom monera contains

(a) Dinoflagellate

(b) Bacteria

(c) Slime moulds

(d) Euglenoid