Which character differentiates living things from non-living organisms?

1. 1. They live in the same ecosystem
   2. They are highly organized and complex made of one or more cells and contain genetic material
   3. Both a and b
   4. They are acted upon by the same environment

What is the function of synapse_____.

1. 1. To allow nerve impulse to move in backward direction
   2. To stop the nerve impulse
   3. To provide cytoplasmic connection between neurons.
   4. To decrease the speed of nerve impulse

Which one is not the function of endoplasmic reticulum?

1. 1. Nerve impulse conduction
   2. Transport of material
   3. Synthesis of conjugated molecules
   4. Mechanical support

Symbionts which help plants in uptake of phosphorous and trace metals such as zinc and copper.

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

Percentage of proteins in cell membrane is_____.

1. 1. 60-80%
   2. 30-40%
   3. 25-50%
   4. 80-100%

Number of cells that are destroyed in adults by apoptosis are _____.

1. 1. 20 to 35 billion cells
   2. 10 to 20 billion cells
   3. 15 to 25 billion cells
   4. 50 to 70 billion cells

The expected number of RBCs in a single drop, or microliter, of blood is _____million in Men.

1. 1. 3.4 to 6.8 million
   2. 3.2 to 7.2 million
   3. 4.5 to 6.2 million
   4. 4.0 to 5.2 million

Enteron in coelenterates acts as_____.

1. 1. Transporting cavity
   2. Digestive cavity
   3. Body cavity
   4. all of these

Proteins are made from amino acids by the process of_____.

1. 1. Hydrolysis
   2. Pinocytosis
   3. Active transport
   4. Dehydration synthesis

A virion is_____.

1. 1. Virus
   2. Viral protein
   3. Viral lysozyme
   4. Viral gene