In five kingdom classification, which single kingdom contains blue-green algae, nitrogen-fixing bacteria and methanogenic archaebacteria
(1) Monera
(2) Protista
(3) Plantae
(4) Fungi
Identify 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 |
Identify 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. |
Identify 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.
Diatoms 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
Consider the following characters:
I. Heterotroph organisms
II. A dikaryon stage
III. Cell wall made of chitin
IV. Undergo nuclear mitosis
Which of the above relate to fungi?
(1) I, II and III
(2) I, III and IV
(3) II, III and IV
(4) I, II, III and IV
How many of the following statements regarding fungi are true?
I. | Asexual reproduction is common by the formation of spores. |
II. | Their bodies consist of hyphae that may be interconnected to form mycelium. |
III. | They secrete digestive enzymes onto organic matter and then absorb the products of the digestion. |
IV. | Fungi can break down almost any carbon containing product. |
V. | Fungi do not enter symbiotic relationships. |
1. 2
2. 3
3. 4
4. 5
Identify the group of fungi that is not correctly matched with all the characters given below:
1. | Phycomycetes: | Mycelium – aseptate and coenocytic / Asexual reproduction by motile zoospores or by nonmotile aplanospores / spores – endogenously produced in the sporangium |
2. | Ascomycetes: | Mycelium – unbranched and septate / Asexual spores are conidia / Conidia produced endogenously on conidiophores. |
3. | Basidiomycetes: | Mycelium–branched and septate / Asexual spores are generally not found. |
4. | Deuteromycetes: | Only the asexual or vegetative phase of these fungi are known. |
Identify the incorrect statement:
1. | Virus has a protein coat called capsid made of small subunits called capsomeres. |
2. | The core has the genetic material - either RNA or DNA or both. |
3. | The capsomeres are arranged in helical or icosahedral forms. |
4. | Viruses can infect any type of organism. |
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 atmospheric nitrogen
The Corrcet explanations would be:
1. I and II only
2. I and III only
3. II and III only
4. I, II and III