Consider the following regarding the reasons for the fact that now Cyanobacteria are kept in Monera and not in Plantae:
I. They are prokaryotes.
II. The cell wall of cyanobacteria has peptidoglycan.
III. They can fix atomspheric nitrogen
The correct explanations would be:
(1) I and II only
(2) I and III only
(3) II and III only
(4) I, II and III
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following are valid pointers to the demerits of the two kingdom classification proposed by Linnaeus?
I. Euglena has features both of plants and animals.
II. Chlamydomanas is autotrophic but has flagella.
III. Slime molds resemble animals in one phase of their life cycle and plants in the other phase.
(1) I and II only
(2) I and III only
(3) II and III only
(4) I, II and III
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIdentify the group that is not matched correctly to all the characters shown:
Group | Cell Type | Cell Wall | Nuclear Membrane | Body Organization | |
1. | Monera | Prokaryotic | Absent | Absent | Cellular |
2. | Protista | Eukaryotic | Present in some | Present | Cellular |
3. | Fungi | Eukaryotic | Present | Present | Multicellular/loose tissue |
4. | Plantae | Eukaryotic | Present | Present | Tissue/organ |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMath Column I with Column II and choose your answer from the codes given:
|
Column I (Bacterium) |
|
Column II (shape) |
I. |
Escherechia coli |
1. |
Spherical |
II. |
Streptococcus pyogenes |
2. |
Helically coiled |
III. |
Treponema pallidum |
3. |
Rod shaped |
|
I |
II |
III |
(1) |
1 |
2 |
3 |
(2) |
3 |
1 |
2 |
(3) |
3 |
2 |
1 |
(4) |
1 |
3 |
2 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIdentify the incorrect statement regarding bacteria:
(1) Bacteria are the most abundant microorganisms.
(2) Bacteria live in extreme habitats where very few other life forms can survive.
(3) Bacteria as a group show the most extensive metabolic diversity.
(4) They are obligate intracellular parasites.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyConsider the following statements regarding characters of Archaebacteria that they share with eukaryotes:
I. The cell wall does not contain peptidoglycan.
II. DNA associated with histones.
III. Translation initiated with formylated methionine.
IV. RNA polymerase similar to eukaryotic RNA polymerase II
V. ATPase similarity
VI. Similar DNA replication and repair
How many of the above characters Archaebacteria share with eukaryotes?
(1) 3
(2) 4
(3) 5
(4) 6
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIdentify a character that is not unique to archaebacteria:
(1) Cell wall structure
(2) Cell membrane structure
(3) Flagellin protein structure
(4) Fatty acid synthetase present
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIdentify the incorrect statement regarding true bacteria?
(1) As a group, they exhibit maximum metabolic diversity
(2) Chemosynthetic autotrophic bacteria play a great role in recycling nutrients like nitrogen, phosphorous, iron and sulphur.
(3) Heterotrophic bacteria are the most abundant in nature.
(4) Bacteria reproduce mainly by fission but sometimes under favourable conditions, they produce spores.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyConsider the following statements regarding Mycoplasma:
I. They are a genus of bacteria that have a unique cell wall of their own.
II. In their genetic code UGA codes for tryptophan.
III. None of them is pathogenic to humans.
IV. They have a large genome.
V. They can be killed by penicillins.
VI. They can survive without oxygen
The number of correct statements is:
(1) 1
(2) 2
(3) 3
(4) 4
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyDiatoms have left behind large amounts of cell wall deposits in their habitat because:
(1) They are most abundant in that habitat
(2) Their life span is long
(3) Their wall is indestructible
(4) The statement is not true
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology