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
Which of the following unicellular organism has a macronucleus for trophic function and one or more micronuclei for reproduction -
1. Trypanosoma
2. Paramecium
3. Euglena
4. Amoeba
Which of the following statements is true for Heterotrophic bacteria?
1. | They fix nitrogen in legume roots. |
2. | The majority are important decomposers. |
3. | Helpful in making curd from milk and production of antibiotics. |
4. | All of these. |
Who showed that viruses could be crystallized and crystals consist largely of proteins?
1. D.J. Ivanowsky
2. M.W. Beijerinek
3. W.M. Stanley
4. T.O. Diener
Which of the following is not true for chrysophytes?
1. Found in fresh water as well as in marine environment.
2. Cell membranes are embedded with silica.
3. Most of them are photosynthetic.
4. Microscopic and float passively in water currents.
When generic name is repeated in specific name of a plant it is called:
1. Synonym
2. Autonym
3. Tautonym
4. None above
Which one of the following statements about mycoplasma is wrong?
1. They are pleomorphic
2. They are sensitive to Penicillin
3. They cause diseases in plants
4. They are called PPLO
Photosynthetic protists with indestructible cell wall are
1. Pyrophytes.
2. Chrysophytes.
3. Euglenophytes.
4. Myxomycetes.
According to Whittaker system, organisms with chemosynthetic autotrophic nutrition and cellular body organization belong to
1. Monera and protista.
2. Monera.
3. Monera and fungi.
4. Protista.
Following are four statement some of them have certain mistakes.
(i) One of the drawback of Whittaker system is that he does not given any place to viruses, viroids and lichen.
(ii) Viruses are non-cellular organisms that have active crystalline structure outside the living cell.
(iii) The capsomeres in viruses are arranged in helical or polyhedral geometrical form.
(iv) Phycobiont in lichen absorbs mineral nutrients.
Two statements with mistakes are
1. i & iv
2. ii & iv
3. i & ii
4. iii & iv
Artificial system of classification includes all except
1. Equal weightage to vegetative and reproductive characters
2. Mainly gross morphological character.
3. Closely related species together.
4. Only few characters.
Which statement is incorrect for slime moulds?
1. Slime moulds form an aggregation called plasmodium which can spread over many feet.
2. Slime moulds are saprophytic protists and move along decaying twigs to engulf organic material.
3. Plasmodium forms fruiting bodies bearing spores at their tips under unfavourable conditions.
4. Spores possess true chitin wall, extremely resistant and dispersed by water current
Match the column I with column-II :-
Column I Column II
(i) Dinoflagellates (a) Pellicle
(ii) Diatoms (b) Saprotrophic
(iii) Slime moulds (c) Cellulosic cell wall
(iv) Euglenoids (d) Cellulosic cell wall with silica
1. i-d, ii-c, iii-b, iv-a
2. i-c, ii-d, iii-b, iv-a
3. i-c, ii-d, iii-a, iv-b
4. i-d, ii-c, iii-a, iv-b
Which of the following is not correct for slime moulds?
1. Somatic phase is plasmodium.
2. They are saprophytic.
3. Spore is with wall.
4. They are pathogenic.
Bacterial cells containing F-plasmid
1. Are designated as F+ cells.
2. Functions as DNA donor during conjugation.
3. Function as DNA recipients during conjugation.
4. Both 1 & 2.
Oxygen evolving photoautotrophic monerans are
1. Cyanobacteria
2. Actinomycetes
3. Archaea
4. Photolithotrophs
Hotspots are the area of
1. High endemism.
2. High level of species richness.
3. High noise pollution.
4. Both 1 and 2.
Insectivarous plants are?
1. Autotrophic.
2. Heterotrophic.
3. Partial heterotroph.
4. Osmotroph.
The three domains system of classification holds true for how many statements?
1. It divided kingdom morera into 2-domains.
2. Third domain includes only eukaryotic organisms.
3. It lead to six kingdom classification.
4. All of the above.
Match the following
Classification System Basis
A. Artificial 1. Natural affinities.
B. Natural 2. Number of characters.
C. Phylogenetic 3. One or few character.
D. Numerical 4. Fossil evidence.
Options
A B C D
1. 3 1 4 2
2. 3 4 2 1
3. 1 2 3 4
4. 3 2 4 1
Consider the following statements and select the option that correctly fill in the blanks
(a) __________ acts as gametes in plasmodial slime moulds.
(b) __________ forms a connecting link with plants, animals and fungi.
(c) __________ are regarded as advanced protists and primitive fungi.
(d) __________ is producer-consumer protist.
How many of the following are incorrectly matched?
(1) Porphyra - Chlorophyll a and b
(2) Dictyota - Fucoxanthin
(3) Ulothrix - Mannitol
(4) Sargassum - Laminarin
1. 1
2. 3
3. 4
4. 2
Identify the organism that shows the following characteristics.
(a) Zygotic meiosis
(b) Causes red tide of the sea
(c) Mesokaryon organisation
(d) Whirling whips
1. Noctiluca
2. Gonyaulax
3. Melosira
4. Navicula
W.M. Stanley
1. Discovered TMV.
2. Coined the term virus.
3. Demonstrated that extract of infected plant can cause tobacco mosaic disease in healthy plants.
4. Crystallised virus and showed that crystals are largely made up of proteins.
Read the following statement with respect to prokaryotic cell
I. Single envelope system present.
II. Mesosome increases surface area for enzyme action.
III. The small circular DNA outside the genomic DNA confers unique phenotype.
IV. Contains pseudovacuoles.
1. Only I is correct.
2. Only I and II are correct.
3. Only I, II and III are correct.
4. I, II, III and IV are correct.