21.

One gene-one enzyme relationship was established for the first time in

• Neurospora crassa

• Salmonella typhimurium

• Escherichia coli

• Escherichia coli

A genetically engineered micro-organism use successfully in bioremediation of oil spills is a species of

• Pseudomonas

• Trichoderma

• Xanthomonas

• Xanthomonas

In which one of the following preparations are you likely to come across cell junctions most frequently?

• Ciliated epithelium.

• Thrombocytes

• Tendon

• Tendon

What is common between parrot, platypus and kangaroo?

• Homeothermy

• Toothless jaws

• Functional post-anal tail

• Functional post-anal tail

Which pair of the following belongs to Basidiomycetes?

• Birds nest fungi and Pufballs

• Pufballs and Calviceps

• Peziza and Stink horns

• Peziza and Stink horns

Spore dissemination in some liverworts is aided by

• elaters

• indusium

• calyptra

• calyptra

A person who is on a longer hunger strike and is surviving only on water, will have

• more sodium in his urine

• less amino acids in his urine

• more glucose in his blood 

• more glucose in his blood 

Which one of the following pairs, is not correctly matched?

• Abscisic acid -  Stomatal closure

• Gibberellic acid - Leaf fall

• Cytokinin - Cell division

• Cytokinin - Cell division

Which one of the following is a matching pair of a body feature and the animal possessing it?

• Post-anal tail   -   Octopus

• Ventral Central nervous system - Leech nervous system

• Pharyngeal gill slits absent in embryo

• Pharyngeal gill slits absent in embryo

Which of the following pairs are correctly matched?
Animals                          Morphological features
(i) Crocodile             -       4-chambered heart
(ii) Sea urchin          -        Parapodia
(iii) Obelia                -       Thecodont
(iv) Lemur                -       Thecodont

• A, C and D

• B, C and D

• Only A and D

• Only A and D