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• AIPMT 2014/
• AIPMT Solved Paper 2011/
• Biology

Biology 2011

  

Q. 11. A collection of plants and seeds having diverse alleles of all the genes of a crop is called  

1. Genome
2. Herbarium
3. Germplasm
4. Gene library

Sol:

Germplasm can be selected as seed or plantlets for their superior traits.

Answer: (3)

 

Q. 12.  Which one of the following also acts as a catalyst in a bacterial cell?

1. 23 sr RNA
2. 5 sr RNA
3. sn RNA  
4. hn RNA

Sol:

23 S rRNA is catalytic RNA.

Answer: (1)

 

Q. 13. Which one of the following statements is correct?

1. Flower of tulip is a modified shoot
2. In tomato, fruit is a capsule
3. Seeds of orchids have oil-rich endosperms
4. Placentation in primose is basal

Sol:

Tomato — Berry, Orchid seed — no endosperm formation, Primrose — Free central placentation.

Answer: (1)

 

Q. 14. The correct floral formula of chilli is

Sol:

Chilli belongs to Solanaceae.

Answer: (3)

 

Q. 15. Nitrifying bacteria

1. Reduce nitrates to free nitrogen
2. Oxidize ammonia to nitrates
3. Convert free nitrogen to nitrogen compounds
4. Convert proteins into ammonia

Sol:

Step (1) — Nitrification by Nitrosomonas

Step (2) — Nitratification by Nitrocystis

Answer: (2)

 

Q. 16. The function of leghaemoglobin in the root nodules of legumes is  

1. Expression of nif gene
2. Inhibition of nitrogenase activity
3. Oxygen removal   
4. Nodule differentiation

Sol:

LHB is O2 scavanger.

Answer: (3)