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Life Process Question and Answer MCQ. We covered all the Life Process Question and Answer MCQ below in this post for free.
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Life Process Question and Answer MCQ for Students
Gaseous exchange in the lungs from alveoli to blood capillaries happens through the process of
a. osmosis
b. diffusion
c. filtration
d. none of the above
Option b – diffusion
The amount of carbon dioxide in exhaled air is approximately
a. 0.03%
b. 0.04%
c. 1%
d. 4%
Option d – 4%
Which organelle is referred to as the powerhouse of the cell?
a. chloroplast
b. mitochondria
c. nucleus
d. ribosome
Option b – mitochondria
The oxygen content in the air we breathe out is roughly
a. 16%
b. 20%
c. 21%
d. 79%
Option a – 16%
The ion commonly found in chloroplasts is
a. magnesium
b. iron
c. manganese
d. chloride
Option a – magnesium
After intense exercise, the blood contains a higher level of
a. citric acid
b. lactic acid
c. acetic acid
d. oxygen
Option b – lactic acid
The primary cause of muscle fatigue is the accumulation of
a. oxygen
b. carbon dioxide
c. acetic acid
d. lactic acid
Option d – lactic acid
What are the end products of fermentation?
a. ethyl alcohol, CO₂
b. lactic acid, CO₂
c. oxygen, lactic acid
d. ethyl alcohol, O₂
Option a – ethyl alcohol, CO₂
The term “cardiac” refers to which organ?
a. heart
b. vein
c. lymph
d. capillary
Option a – heart
Which chamber of the heart contains blood low in oxygen?
a. left ventricle
b. right ventricle
c. left atrium
d. right atrium
Option d – right atrium
What part of the heart regulates blood flow?
a. arteries
b. veins
c. valves
d. capillaries
Option c – valves
Which student gave the correct statement?
a. Ravi said xylem and phloem are stacked to form tubes
b. John said they are not separate tube-like structures
c. Salma said xylem and phloem connect to form tubes
d. Hari said they are called tubes because of their shape
Option c – Salma said xylem and phloem connect to form tubes
Aphids extract plant sap by piercing the
a. xylem
b. phloem
c. cambium
d. vascular bundle
Option b – phloem
Lymph is part of the
a. digestive system
b. excretory system
c. nervous system
d. circulatory system
Option d – circulatory system
Which group has an incompletely divided ventricle?
a. fish
b. frog
c. reptile
d. bird
Option c – reptile
Which of these has an open circulatory system?
a. frog
b. earthworm
c. human
d. butterfly
Option d – butterfly
Double circulation occurs in
a. earthworm
b. cockroach
c. fish
d. monkey
Option d – monkey
The valve between the right atrium and right ventricle is the
a. tricuspid valve
b. bicuspid valve
c. pulmonary valve
d. aortic valve
Option a – tricuspid valve
The pericardium is related to the
a. lung
b. kidney
c. brain
d. heart
Option d – heart
Animals with four-chambered hearts include
a. fishes, birds
b. amphibians, reptiles
c. reptiles, mammals
d. birds, mammals
Option d – birds, mammals
Reptiles typically have
a. fully divided ventricles
b. a single ventricle
c. incompletely divided ventricles
d. no ventricles
Option c – incompletely divided ventricles
Oxygen-rich blood returns to the heart through the
a. pulmonary heart
b. post caval vein
c. coronary vein
d. pulmonary vein
Option d – pulmonary vein
The vena cava opens into the
a. right atrium
b. left atrium
c. right ventricle
d. left ventricle
Option a – right atrium
A heart attack usually results from blockage of the
a. pulmonary artery
b. coronary artery
c. coronary vein
d. pulmonary vein
Option b – coronary artery
The pulmonary artery originates from the
a. right ventricle
b. left ventricle
c. right atrium
d. left atrium
Option a – right ventricle
Deoxygenated blood from the heart is sent to the
a. kidney
b. lungs
c. neck
d. stomach
Option b – lungs
The right atrium receives
a. oxygenated blood
b. lymph
c. mixed blood
d. deoxygenated blood
Option d – deoxygenated blood
Blood pressure is measured using a
a. galvanometer
b. sphygmomanometer
c. barometer
d. thermometer
Option b – sphygmomanometer
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