Practice Pakistan's most useful MCQs for competitive exams

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

Answer

Submitted By :Ali Uppal

___________ respiration is the process by which cell utilized oxygen and produces CO2 ?

• (A)  Cellular
• (B)  Organismic
• (C)  Both of these
• (D)  None of these

Answer

Submitted By :Ali Uppal

Lungs are covered with double layered thin membranous sac called___________?

• (A)  Disphragm
• (B)  Pleura
• (C)  Pericardium
• (D)  Rib cage

Answer

Submitted By :Ali Uppal

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

• (A)  Organismic
• (B)  Cellular
• (C)  Both of these
• (D)  None of these

Answer

Submitted By :Ali Uppal

Lungs are spongy due to the presence of million of___________?

• (A)  Air sacs
• (B)  Alveoli
• (C)  Bronchioles
• (D)  Parabronchi

Answer

Submitted By :Ali Uppal

Functional units of lungs are called________?

• (A)  Alveoli
• (B)  Air sacs
• (C)  Parabronchi
• (D)  None of these

Answer

Submitted By :Ali Uppal

Breaking of terminal phosphate of ATP releases about ___________ Kcal of energy?

• (A)  6.1
• (B)  6.3
• (C)  7.1
• (D)  7.3

Answer

Submitted By :Ali Uppal

ATP are consumed during___________?

• (A)  Glycolysis
• (B)  Kreb’s cycle
• (C)  Light dependent phase
• (D)  none of these

Answer

Submitted By :Ali Uppal

Cellular respiration is essentially a/an _____________ process?

• (A)  Oxidation.
• (B)  Reduction.
• (C)  Redox.
• (D)  None of the abov

Answer

Submitted By :Ali Uppal

Percentage of CO2 carried as carboxyhaemoglobin is_________?

• (A)  5%
• (B)  70%
• (C)  20%
• (D)  10%

Answer

Submitted By :Ali Uppal