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• AIPMT 2010 Biology

AIPMT 2010 Biology

  

Q. 40.   Which one of the following cannot be explained on the basis of Mendel’s Law of Dominance?

1. The discrete unit controlling a particular character is called a factor
2. Out of one pair of factors one is dominant, and the other recessive
3. Alleles do not show any blending and both the characters recover as such in F₂ generation.
4. Factors occur in pairs

Answer: (3)

Q. 41.    The chief water conducting elements of xylem in gymnosperms are:

1. Vessels
2. Fibres
3. Transfusion tissue
4. Tracheids

Answer: (4)

Q. 42.    Ringworm in humans is caused by :

1. Bacteria
2. Fungi
3. Nematodes
4. Viruses

Answer: (2)

Q. 43. Which one of the following is not a micronutrient?

1. Molybdenum
2. Magnesium
3. Zinc
4. Boron.

Answer: (2)

Q. 44.    Vasa efferentia are the ductules leading from:

1. Testicular lobules to rete testis
2. Rete testis to vas deferens
3. Vas deferens to epididymis
4. Epididymis to urethra

Answer: (2)

Q. 45.    Select the two correct statements out of the four (a − d) given below about lac operon.

1. Glucose or galactose may bind with the repressor and inactivate it
2. In the absence of lactose the repressor binds with the operator region
3. The z-gene codes for permease
4. This was elucidated by Francois Jacob and Jacque Monod
   The correct statements are:

1. (b) and (c)
2. (a) and (c)
3. (b) and (d)
4. (a) and (b)

Answer: (3)