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
D.
very much smaller and fewer
RBCs or erythrocytes of frog are oval, disc-like biconvex, have centrally placed nucleus and with haemoglobin. Usually in mammals (including human), RBCs are circular and non-nucleated except those of family Camilladae (camels, llamas, etc), which have nucleated RBCs
They cyanobacteria area also referred to as
protists
golden algae
slime moulds
slime moulds
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
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
