Amylase becomes denatured at an alkaline pH of_____.

1. 1. 8
   2. 9
   3. 10
   4. 11

What happens during muscle contraction to the length of each myosin and action filament?

1. 1. A band becomes short
   2. 1 band elongates
   3. Z- lines get closer
   4. There is no change in sarcomere

The major cell infected by the HIV is lymphocyte ?

1. 1. helper-B
   2. helper-T
   3. both T and B
   4. None of these

Oncogene is responsible for:_____.

1. 1. Malaria
   2. Cancer
   3. Typhoid
   4. Lung Disease

Ribose is an example of_____.

1. 1. Trioses
   2. Tetroses
   3. Hexose
   4. Pentose

Which of the following substance is most favorable to form structural component of biological membranes_____.

1. 1. Hydrophobic fats
   2. Hydrophilic Carbohydrates
   3. Both a and b
   4. None of them

What does lalopathy mean?

1. 1. A disorder of speech
   2. A disorder of hearing
   3. A disorder of learning
   4. None of them

Specialized protective coverings around megasporangium which vary in number are called_____.

1. 1. Sporangium
   2. Ovule
   3. Pericarp
   4. Integuments

The only promoter of leaf senescence in the following plant hormones is_____.

1. 1. Abscisic Acid
   2. Gibberellins
   3. Cytokinins
   4. Auxins

Pollen grains in pinus have _____for dispersal through wind?

1. 1. Wings
   2. Flagella
   3. Cilia
   4. Feathers