Which of the following is correct about viroids?
(1) They have free RNA without protein coat
(2) They have DNA with protein coat
(3) They have free DNA without protein coat
(4) They have RNA with protein coat
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following is incorrect about Cyanobacteria?
1. They are photoautotrophs
2. They lack heterocysts
3. They often form blooms in polluted water bodies
4. They have chlorophyll A similar to green plants
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch the organisms in column I with habitats in column II.
Column I Column II
(a) Halophiles (i) Hot springs
(b) Thermoacidophiles (ii) Aquatic environment
(c) Methanogens (iii) Guts of ruminants
(d) Cyanobacteria (iv) Salty areas
Select the correct answer from the options given below:
1. (a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)
2. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
3. (a)-(iii), (b)-(iv), (c)-(i), (d)-(i)
4. (a)-(ii). (b)-(iv), (c)-(iii), (d)-(i)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following statements is correct?
1. Lichens do not grow in polluted areas.
2. Algal component of lichens is called mycobiont
3. Fungal component of lichens is called phycobiont
4. Lichens are not good pollution indicators.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMad cow disease in cattle is caused by an organism which has :
1. Inert crystalline
2. Abnormally folded protein
3. Free RNA without protein coat
4. Free DNA without protein coat
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyHow many organisms in the list given below are autotrophs ?
Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Sacharomyces, Trypanosoma, Porphyra, Wolfia
1. Five
2. Six
3. Three
4. Four
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following sets of items in the option 1 – 4 are correctly categorized with one exception in it ?
ITEMS |
CATEGORY |
EXCEPTION |
|
1 |
Kangaroo, Koala, wombat |
Australian marsupials |
Wombat |
2 |
Plasmodium, Cuscuta, Trypanosoma |
Protozoan parasites |
Cuscuta |
3 |
Typhoid, Pneumonia, Diphtheria |
Bacterial diseases |
Diphtheria |
4 |
UAA, UAG, UGA |
Stop codons |
UAG |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn the five-kingdom classification, Chlamydomonas and Chlorella have been included in
1. Algae
2. Plantae
3. Monera
4. Protista
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyGiven below is the diagram of a bacteriophage. In which one of the options all the four parts A, B, C and D are correct –
Options
A B C D
1. Sheath Collar Head Tail fibres
2. Head Sheath Collar Tail fibres
3. Collar Tail fibres Head Sheath
4. Tail fibres Head Sheath Collar
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyBlack (stem) rust of wheat is caused by -
1. Ustilago nuda
2. Puccinia graminis
3. Xanthomonas oryzae
4. Alternaria solani
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology