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

Viruses that infect bacterial multiplication and cause their lysis, are called:

1. Lysosomes

2. lipolytic

3. lytic

4. lysogenic