Saprophytic protists are:
1. | Slime moulds | 2. | Dinoflagellates |
3. | Chrysophytes | 4. | Protozoans |
Which of the following statements regarding Euglenoids is not true?
1. | Instead of a cell wall, they have a lipid rich pellicle |
2. | They have two flagella, a short and a long one |
3. | They are photosynthetic in the presence of sunlight but behave like a heterotroph when deprived of sunlight |
4. | Pigments of Euglenoids are identical to those present in higher plants |
Identify the incorrectly matched pair:
1. Diatoms: Chief producers in oceans
2. Dinoflagellates: Red tides
3. Slime moulds: Spores dispersed by water
4. Euglenoids: Protein rich pellicle
The domain Archaea is not characterized by:
(1) Pseudopeptidoglycan in cell wall
(2) Linear chromosomes
(3) Introns present is some genes
(4) Methanogeneisis as unique metabolism
Members of Kingdom Protista:
1. are primarily aquatic
2. do not have membrane bound organelles
3. are all ciliated or flagellated
4. reproduce exclusively by asexual means
Match each item in Column I with one in Column II and select your answer from the codes given below:
Column I | Column II | ||
A. | Diatoms | a. | Protein-rich layer of pellicle |
B. | Dinoflagellates | b. | Cell wall embedded with silica |
C. | Euglenoids | c. | Spores with true walls |
D. | Slime moulds | d. | Cellulose plates in the cell wall |
Codes:
A | B | C | D | |
1. | b | a | c | d |
2. | b | d | a | c |
3. | b | c | a | d |
4. | b | a | d | c |
All the following statements regarding Basidiomycetes are correct except:
1. | The mycelium is branched and septate |
2. | Asexual spores and vegetative reproduction are generally not found |
3. | Sex organs are absent |
4. | Basidiospores are exogenously produced on the basidium |
Match the Scientists in Column I with their contribution in the field of virology given in Column II and select your answer from the codes given below:
Column I | Column II | ||
A. | Ivanowsky | a. | Recognized tobacco mosaic is caused by microbes smaller than bacteria |
B. | Beijerinck | b. | Demonstrated extract of infected tobacco plants could cause infection in healthy plants |
C. | Stanley | c. | Showed that viruses could be crystallized |
Codes:
A | B | C | |
1. | a | b | c |
2. | a | c | b |
3. | b | a | c |
4. | b | a | d |
Cells in some filamentous cyanobacteria that are specialized for nitrogen fixation are called:
1. Phycobilisomes
2. Chromatophores
3. Grana
4. Heterocysts
Which of the following are found in extreme saline conditions?
1. Archaebacteria
2. Eubacteria
3. Cyanobacteria
4. Mycobacteria