Lungs are covered with double layered thin membranous sac called___________?

A. Disphragm
B. Pleura
C. Pericardium
D. Rib cage

During rest the breathing occurs rhythmically at the frequency of _________ times per minute in human?

A. 16-30
B. 15-20
C. 5?10
D. 6?12

The maximum amount of oxygen which normal human blood absorbs and carries at sea level is ________ per 100 ml of blood.

A. 10 ml
B. 20 ml
C. 30 ml
D. 40 ml

ATP are consumed during___________?

A. Glycolysis
B. Kreb’s cycle
C. Light dependent phase
D. None of these

Functional units of lungs are called________?

A. Alveoli
B. Air sacs
C. Parabronchi
D. None of these

Lungs are spongy due to the presence of million of___________?

A. Air sacs
B. Alveoli
C. Bronchioles
D. Parabronchi

The chlorophyll molecule is embedded in the core of thylakoid membrane which acts as___________?

A. Hydrophilic
B. Hydrophobic
C. Both of these
D. None of these

The most important photosynthetic pigment is ___________?

A. Chlorophyll a
B. Chlorophyll b
C. Xanthophyll
D. Carotenes

Final acceptor of electrons in respiratory chain is____________?

A. Nadh
B. Cytochrome a3
C. Water
D. Oxygen

From one pyruvate passing through Kreb’s cycle, how many NADH are formed?

A. 1
B. 2
C. 3
D. 4