21.

They cyanobacteria area also referred to as

• protists

• golden algae

• slime moulds

• slime moulds

The highest number of species in the world is represented by

• fungi

• mosses

• algae

• algae

In which one of the following options the two examples are correctly matched with their particular type of immunity?

• Examples	Type of immunity
  Polymorpho-nuclear leukocytes and monocyte	Cellular barriers

• Examples	Type of immunity
  Anti-tetanus and anti-snake bite injections	Active immunity

• Examples	Type of immunity
  Saliva in mouth and Tears in eyes	Physical barriers

• Examples	Type of immunity
  Saliva in mouth and Tears in eyes	Physical barriers

Which one of the following is wrong statement?

• Anabaena and Nostoc are capable of fixing nitrogen in free-living state also

• Root nodule forming nitrogen fixers live as aerobes under free-living conditions

• Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins

• Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins

Anxiety and eating spicy food together in an otherwise normal human may lead to

• Vomiting

• Indigestion

• Jaundice

• Jaundice

Compared to those of humans, the erythrocytes in frog are

• without nucleus but with haemoglobin

• nucleated and with haemoglobin

• very much smaller and fewer

• very much smaller and fewer

In which one of the following, the genus name, its two characters and its phylum are not correctly matched, whereas the remaining three are correct?

• Genus Name		Two characters	Phylum
  pila	(i) (ii)	Body segmented Mouth with Radula	Mollusca

• Genus Name		Two characters	Phylum
  Asterias	(i) (ii)	Spiny skinned Water vascular system	Echinodermatac

• Genus Name		Two characters	Phylum
  Sycon	(i) (ii)	Pore bearing Canal system	Porifera

• Genus Name		Two characters	Phylum
  Sycon	(i) (ii)	Pore bearing Canal system	Porifera

What is true about ribosomes?

• The prokaryotic ribosomes are 80S, where S stands for sedimentation coefficient. 

• These are composed of ribonucleic acid and proteins

• These are found only in eukaryotic cells

• These are found only in eukaryotic cells

Which statement is wrong for viruses?

• All are parasites

• All of them have helical symmetry

• They have ability to synthesize nucleic acids and proteins

• They have ability to synthesize nucleic acids and proteins

Which one of the following is correctly matched?

• Onion – Bulb

• Ginger – Sucker

• Chlamydomonas – Conidia

• Chlamydomonas – Conidia