Out of 92 naturally occurring chemical elements how many are considered as bio-elements_____.

1. 1. 6
   2. 26
   3. 15
   4. 16

Term allele was coined by?

1. 1. Negalli
   2. Dixon
   3. Bitson
   4. Robert Brown

What content does only a plant cell has_____.

1. 1. Cell Membrane
   2. Cytoplasm
   3. Chromatin
   4. Cell wall

_____potential is the measure of the change in water potential of a system due to the presence of solute molecules?

1. 1. Pressure
   2. Osmotic
   3. Both a & b
   4. None of these

Which of the following statement is incorrect about RNA _____?

1. 1. The pentose sugar in it is Ribose
   2. It is present in the nucleoli
   3. It contains Adenine Guanine Thymine and Cytosine
   4. It may be folded back on itself to give double helical characteristics

Ecosystem not found in Pakistan is_____.

1. 1. Tundra
   2. Tropical rain forest
   3. Temperate deciduous forest
   4. Grassland

Amoeba secretes digestive enzymes to hydrolyse _____.

1. 1. Proteins
   2. Starch
   3. Sugar
   4. All of these and fats

Which of the following constituent is/are maximum in the filtrate that leaves proximal convoluted tubules?

1. 1. Nitrogenous waste
   2. Glucose
   3. Amino acids
   4. None of these

Annual rainfall in grassland is about_____.

1. 1. More than 2500 mm
   2. 750-1500 mm
   3. Less than 250 mm
   4. 250-750 mm

How many hearts does an Octopus have?

1. 1. 2
   2. 3
   3. 4
   4. 5