NEET Biology Previous year MCQ Bank With Answer Key - 05

81. Temperature tolerance of thermal blue-green algae is due to

(1) mitochondrial structure
(2) cell wall structure
(3) homopolar bonds in their proteins
(4) cell organisation

82. The term antibiotic was first used by

(1) Waksman
(2) Flemming
(3) Lister
(4) Pasteur

83. Organelle/organoid involved in genetic engineering is

(1) golgi apparatus
(2) plasmid
(3) lomasome
(4) mitochondrion

84. Tobacco Mosaic Virus (TMV) genes are

(1) polyribonucleotides
(2) double stranded RNA
(3) proteinaceous
(4) single stranded RNA

85. Reverse transcriptase is

(1) DNA dependent DNA polymerase
(2) RNA dependent RNA polymerase
(3) RNA dependent DNA polymerase
(4) DNA dependent RNA polymerase

86. Entamoeba coli causes

(1) Dysentery
(2) Pyrrhoea
(3) None
(4) Diarrhoea

87. Protistan genome has

(1) gene containing nucleoproteins condensed together in loose mass
(2) membrane bound nucleoproteins embedded in cytoplasm
(3) nucleoprotein in direct contact with cell substance
(4) free nucleic acid aggregates

88. Nitrogen fixer soil organisms belong to

(1) green Algae
(2) mosses
(3) soil Fungi
(4) bacteria

89. Rickettsiae constitute a group under

(1) independent group between bacteria and viruses
(2) bacteria
(3) fungi
(4) viruses

90. Nonsymbiotic nitrogen fixers are

(1) soil fungi
(2) Azotobacter
(3) blue-green algae
(4) Pseudomonas

91. Decomposers are organisms that

(1) attack and kill plants as well as animals
(2) illaborate chemical substances, causing death of tissues
(3) operate in relay terms, simplifying step by step the organic constituents of dead body
(4) operate in living body and simplifying organic substances of cells step by

92. Claviceps purpurea is causal organism of

(1) Ergot of Rye
(2) Smut of Barley
(3) Powdery Mildew of Pea.
(4) Rust of Wheat

93. Ustilago caused plant diseases called smut because

(1) they develop sooty masses of spores
(2) they parasitise cereals
(3) affected parts becomes completely black.
(4) mycelium is back

94. Protista includes

(1) chemoautotrophs
(2) heterotrophs
(3) all the above
(4) chemoheterotrophs

95. Protists obtain food as

(1) chemosynthesisers
(2) photosynthesisers, symbionts and holotrophs
(3) holotrophs
(4) photosynthesisers

96. Macro and micronucleus are the characteristic feature of

(1) Hydra and Ballantidium
(2) Paramecium and Vorticella
(3) Vorticella and Nictothirus
(4) Opelina and Nictothisus

97. The function of contractile vacuole, in protozoa, is

(1) osmoregulation
(2) locomotion
(3) reproduction
(4) food digestion

98. Which of the following organism possesses characteristics of both a plant and an animal?

(1) Mycoplasma
(2) Bacteria
(3) Paramecium
(4) Euglena

99. The plasmid

(1) is a component of cell wall of bacteria
(2) helps in respiration
(3) is the genetic part in addition to DNA in micro-organisms
(4) genes found inside nucleus

100. Mycorrhiza represents

(1) symbiosis
(2) antagonism
(3) parasitism
(4) endemism