Which of the following organisms are known as chief producers in the oceans?

• Dinoflagellates

• Diatoms

• Euglenoids

• Cyanobacteria

Which one of the following statements about mycoplasma is wrong?

• They are also called PPLO

• They are pleomorphic

• They are sensitive to pencillin

• They are sensitive to pencillin

What is common about Trypanosoma, Noctiluca, Monocystis and Giardia?

• These are all unicellular protists

• They have flagella

• They produce spores

• They produce spores

Which of the following environmental conditions are essential for optimum growth of Mucor on a piece of bread?
A. Temperature of about 25°C
B. 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

• A, C and E only

• A, D and E only

• B, D and E only

• B, D and E only

Which of the following are found in extreme saline
conditions?

• Archaebacteria

• Eubacteria

• Cyanobacteria

• Cyanobacteria

Viroids differ from viruses in having :

• DNA molecules with protein coat

• DNA molecules without protein coat

• RNA molecules with protein coat

• RNA molecules with protein coat

Ciliates differ from all other protozoans in

• using flagella for locomotion

• having a contractile vacuole for removing excess water

• having two types of nuclei

• using pseudopodia for capturing prey

 Match the following with correct combination.

• A	B	C	D	E
  3	1	5	4	2

• A	B	C	D	E
  2	3	1	5	4

• A	B	C	D	E
  4	3	1	5	2

• A	B	C	D	E
  4	5	1	2	3

Diatomaceous earth is obtained from

• Bacillarophyceae

• Xanthophyceae

• Rhodophyceae

• Chrysophyceae

Thermococcus, Methanococcus and Methanobacterium are groups of

• Bacteria containing a cytoskeleton and all membrane-bound organelles

• Archaebacteria with peptidoglycan in their cell wall

• Archaebacteria that consists of protein homologous to eukaryotic core histones

• Most advanced type of bacteria