QRS complex represents_____.

1. 1. Atrial systole
   2. Atrial diastole
   3. Ventricular systole
   4. Ventricular diastole

_____respiration is directly involved in the production of energy, necessary for all living activities?

1. 1. Cellular
   2. Organismic
   3. Both a and b
   4. None of these

Term the time during which an orgnism is present in the body before causing disease?

1. 1. Rest period
   2. Sleeping period
   3. Incubation time
   4. Incubation period

Which one of the following stage preceeds mitosis during cell cycle?

1. 1. G2 phase
   2. G1 phase
   3. S phase
   4. M phase

Ribosomes are assembled in_____.

1. 1. Nucleus
   2. Nucleolus
   3. DNA
   4. RNA

Grave’s disease is produced due to_____.

1. 1. Undersecretion of thyroxin
   2. Undersecretion of corticosteroids
   3. Overproduction of corticosteroids
   4. Overproduction of thyroxin

Exposure to low temperature stimulates plants to flower. This is called_____.

1. 1. Vernalisation
   2. Photoperiodism
   3. Thermotropism
   4. Thermoregulation

Which of the following structure provides greater pathogenicity to the bacteria_____.

1. 1. Capsule
   2. Cell Wall
   3. Cell membrane
   4. Slime

Bacteria which grow either in the presence or absence of oxygen_____.

1. 1. Aerobic bacteria
   2. Anaerobic bacteria
   3. Microaerophilic
   4. Facultative bacteria

Which of the following statement about neuron is incorrect_____.

1. 1. Like all the living cell, when they mature and divide to form similar cells
   2. They not only conduct impulses but also generate them
   3. They are not the only cellular component of nervous system
   4. They may show limited regenerative capabilities