Which of the following environmental conditions are essential for the optimum growth of Mucor on a piece of bread?
(A) | The temperature of about 25 °C |
(B) | The temperature of about 5 °C |
(C) | Relative humidity of about 5% |
(D) | Relative humidity of about 95% |
(E) | A shady place |
(F) | A brightly illuminated place |
Choose the answer from the following options:
1. A, C, and E only
2. A, D, and E only
3. B, D, and E only
4. B, C, and F only
Evolutionary history of an organism is known as:
1. Phylogeny
2. Ancestry
3. Palaeontology
4. Ontogeny
The causative agent of mad-cow disease is a:
1. bacterium
2. prion
3. worm
4. virus
Which statement is correct for bacterial transduction?
1. Transfer of some genes from one bacteria to another bacteria through virus
2. Transfer of genes from one bacteria to other bacteria by conjugation
3. Bacteria obtain DNA directly
4. Bacteria obtain DNA from other external sources.
Which part of the animal virus is not reproduced in multiple copies?
1. Capsid
2. Proteins
3. Envelops
4. Ribosome
Viroid’s have:
1. ssRNA not enclosed protein coat
2. ssDNA not enclosed by protein coat
3. dsDNA enclosed by protein coat
4. dsRNA enclosed by protein coat
Powdery mildew of wheat is caused by a species of:
1. Puccinia
2. Erysphe
3. Ustilago
4. Albugo
Nucleic acid is absent in:
1. virus
2. viroid
3. prion
4. mycoplasma
In most fungi, the cell wall is chiefly made of:
1. cellulose
2. chitin
3. protein
4. lipid
Heterocysts are present in:
1. Riccia
2. Ulothrix
3. Albugo
4. Nostoc