Mycoplasmas

Q.

What is the full form of PPLO?

Q.

What are mycoplasmas?

Q.

What are the characteristics of mycoplasma? Give examples.

Q.

Is a diatom a protist?

Q.

The smallest living cells

1. lack a cell wall

2. are anaerobic

3. are not pathogenic to humans

4. all of the above

Q. Which one of the following statements about Mycoplasma is wrong?

1. They cause diseases in plants
2. They are also called PPLO
3. They are pleomorphic
4. They are sensitive to penicillin

Q.

Branched chain of lipids occur in the cell membranes of______

1. Mycoplasma

2. Streptomyces

3. Actinomycetes

4. Archaebacteria

Q. Unlike fungi, the Oomycota have cell walls of

1. glycolipid
2. chitin
3. cellulose
4. glycoprotein

Q.

Mycoplasma are facultative anaerobes.

1. True
2. False

Q. Which of the following statements is not true for Nostoc?

1. It is filamentous member of Monera
2. It is chemosynthetic autotroph
3. It can fix atmospheric nitrogen
4. It produces some special cells called heterocysts

Q. Which of the following characteristics of mycoplasma make it resistant to penicillin?

1. Ability to be facultative anaerobes
2. Absence of nucleus
3. Absence of cell wall
4. Presence of nucleoid

Q.

Name a cell structure absent in Mycoplasma.

Q. Cell wall of fungi is made up of _____.

1. Cellulose
2. Hemicellulose
3. Chitin
4. Peptidoglycan

Q.

Can endospores cause disease?

Q.

_____ organisms do not possess cell wall.

Q. Mycoplasmas are not sensitive to

1. Penicillin
2. Streptomycin
3. Erythromycin
4. Neomycin

Q.

Can hair algae kill fish?

Q.

Where Can Trichoderma Species Commonly Be Seen?

Q. The organisms which lack a cell wall and can live without oxygen are

1. Thermoacidophiles
2. Methanogens
3. Archaebacteria
4. Mycoplasmas

Q. Cell wall is absent in

1. Funaria
2. Anabaena
3. Mycoplasma
4. Mucor

Q. Describe Mycoplasma and write its few features.

Q. The class of phylum Protozoa in which nutrition is most varied, known as

1. Sporozoa
2. Rhizopoda
3. Cillata
4. Mastigophora

Q. PPLO is

1. Virus
2. Viroid
3. Mycoplasma
4. Bacteria

Q. cyanobacteria is an example of photoautotroph or chemoautotroph?

Q. Carbohydrates are present in the plasmalemma in the form of

1. Lignin
2. Cellulose
3. Phospholipids (glycolipids) and phosphoproteins (glycoproteins)
4. Hemicellulose

Q.

Name an entity that lacks cell wall?

Q. PPLO is not associated with which of the following features?

1. Flexible cell membrane
2. Nucleoid is absent
3. Insensitive to lysozyme and penicillin
4. Smallest living organisms

Q. From the following statements, identify the ones, which are not relevant to archaebacteria.
(a) They live in some of the harshest habitats.
(b) They are present in the gut of several ruminant animals.
(c) They are characterized by the presence of a rigid cell wall.
(d) They include mycoplasma.
(e) They are also referred to as blue-green algae.

1. (a), (c) and (e)
2. (a), (b) and (c)
3. (c), (d) and (e)
4. (a), (c) and (d)
5. (b), (c) and (e)

Q. Cell wall is absent in:

1. Nostoc
2. Aspergillus
3. Funaria
4. Mycoplasma

Q. Which of the following are likely to be present in deep sea water ?

1. Eubacteria
2. Archaebacteria
3. Blue-green algae
4. Saprophytic fungi