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• AIPMT 2010 Biology

AIPMT 2010 Biology

  

Q. 78. Which one of the following statements about certain given animals is correct?

1. Round worms (Aschelminthes) are pseudocoelomates
2. Molluscs are acoelomates
3. Insects are pseudocoelomates
4. Flat worms (Platyhelminthes) are coelomates

Answer: (1)

Q. 79.   Cu ions released from copper − releasing Intra Uterine Devices (IUDs):

1. make uterus unsuitable for implantation
2. increase phagocytosis of sperms
3. suppress sperm motility
4. prevent ovulation

Answer: (3)

Q. 80.   Restriction endonucleases are enzymes which:

1. make cuts at specific positions within the DNA molecule
2. recognize a specific nucleotide sequence for binding of DNA ligase
3. restrict the action of the enzyme DNA polymerase
4. remove nucleotides from the ends of the DNA molecule

Answer: (1)

Q. 81.   Which one of the following is not a lateral meristem?

1. Intrafascicular cambium
2. Interfascicular cambium
3. Phellogen
4. Intercalary meristem

Answer: (4)

Q. 82.    A renewable exhaustible natural resource is:

1. Coal
2. Petroleum
3. Minerals
4. Forest

Answer: (4)

Q. 83. C₄ plants are more efficient in photosynthesis than C₃ plants due to:

1. Higher leaf area
2. Presence of larger number of chloroplasts in the leaf cells
3. Presence of thin cuticle
4. Lower rate of photorespiration

Answer: (4)