Bacteria

Q.

Give short info about the cell wall of Gram-Positive Bacteria.

Q.

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

1. Eubacteria

2. Saprophytic fungi

3. Archaebacteria

4. Blue-green algae

Q.

Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals, and can survive without oxygen?

1. Bacillus

2. Pseudomonas

3. Mycoplasma

4. Nostoc

Q. Rhizobium lives as an aerobic microbe under free living conditions but gets adapted to anaerobic conditions during nitrogen fixation.

1. True
2. False

Q.

What is the difference between cyanobacteria and blue green algae?

Q.

State the importance of archaea.

Q. In eubacteria, a cellular component that resembles eukaryotic cell is:

1. Cell wall
2. Plasma membrane
3. Nucleus
4. Ribosomes

Q.

Are bacterial cells prokaryotic?

Q.

Do all viruses have capsid?

Q.

Explain briefly:

Bacteria are cosmopolitan.

Q.

Name a living cell that can survive without oxygen.

Q.

Is volvox a fungus?

Q.

Would you consider yeast and bacteria as plants? Give reason.

Q.

What type of cell is Nostoc?

Q.

Why are cyanobacteria important?

Q.

Blue green algae are now called _________ because they are more like bacteria.

Q. Lysozyme that is present in saliva and tears destroys:

1. Certain fungi
2. Certain types of bacteria
3. All viruses
4. Most virus infected cells

Q. Which organism is not an example of a eukaryotic cell?

1. Amoeba proteus
2. Paramecium caudatum
3. Escherichia coli
4. Euglena viridis

Q. How many of these pairs are mismatched?
(i) Comma-shaped - Diplococcus
(ii) Rod-shaped - Spirochaete
(iii) Helical - Streptobacillus
(iv) Spherical - Vibrio cholerae

1. 1
2. 2
3. 3
4. 4

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. Given below is assertion and reason.
A. Both assertion and reason are true with reason being the correct explanation
B. Both assertion and reason are true but reason not correct explanation
C. Assertion is true, but reason is wrong
D. Both assertion and reason are wrong

Assertion: Shigella species, E.coli and Salmonella species are all known to be the causes of diarrhoeal diseases.
Reason: Shigella, E.coli and Salmonella are intestinal parasites.

1. A
2. B
3. C
4. D

Q. Actinomycetes are long chain forming bacteria that resembles:

1. Hyphae of fungi
2. Algal chain
3. Cyanobacteria
4. Archaebacteria

Q.

Give appropriate biological terms for the:

The antiseptic substance in tears.

Q. Which organism is not an example of a eukaryotic cell?

1. Amoeba proteus
2. Paramecium caudatum
3. Escherichia coli
4. Euglena viridis

Q.

Which of the following is not a unicellular organism?

1. Amoeba

2. Yak

3. Yeast

4. Rhizobium

Q. Bacterial leaf blight of rice is caused by a species of :

1. Alternaria
2. Erwinia
3. Xanthomonas
4. Pseudomonas

Q. Which of the following statements is NOT correct about the characteristics of Rocky Mountain spotted fever?

1. It is caused by Rickettsia rickettsii
2. Ticks are the primary vectors
3. It is spread by mosquito bites
4. It is also called Brazilian spotted fever

Q.

Peptidoglycan cell wall is a characteristic of:

1. Bacteria

2. Fungi

3. Diatoms

4. Slime moulds

Q.

Membrane-bound organelles are absent in

1. Plasmodium

2. Saccharomyces

3. Streptococcus

4. Chlamydomonas

Q. Rhizobium is:

1. Symbiotic and Gram negative bacterium
2. Symbiotic and Gram positive bacterium
3. Free living nitrogen fixing bacterium
4. Parasitic and nitrogen fixing bacterium