Class 9th biology MCQs chapter 9 “Transport”

By Muhammad LuQman Ashraf

July 9, 2023

5

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Class 9th biology chapter 9 transport MCQs

Class 9th Biology MCQs & Questions
Chapter: 9
“Transport”

The loss of water from plant surface through evaporation is called
a) Absorption
b) Transpiration
c) Respiration
d) Assimilation
Sol: (b) Transpiration
Transpiration from plant surface takes place via a
a) Lenticels
b) Cuticle
c) Stomata
d) All of these
Sol: (d) All of these
How much percentage (%) of the water that enters a plant is lost via transpiration?
a) 80%
b) 90%
c) 75%
d) 85%
Sol: (b) 90%
A single layer of cells surrounding the pericycle is called
a) Conducting tissues
b) Endodermis
c) Epidermis
d) Diffusion
Sol: (b) Endodermis
The rate of transpiration doubles with every dianabol vs anavar rise in temperature.
a) 10°C
b) 20°C
c) 30°C
d) 15°C
Sol: (a) 10°C
The temperature range where transpiration stops
a) 20-40°C
b) 30-40°C
c) 40-45°C
d) 25-30°C
Sol: (c) 40-45°C
In humid air, the rate of diffusion of water vapors is reduced and the rate of transpiration is
a) High
b) Low
c) Moderate
d) None of the above
Sol: (b) Low
When water molecules move up in the xylem of the leaf, it creates a pulling force, this pulling force is called
a) Pressure flow mechanism
b) Transpiration pull
c) Both (a) and (b)
d) None of the above
Sol: (b) Transpiration pull
Which part of the plant is responsible for transporting food
a) Xylem
b) Phloem
c) Root
d) Stem
Sol: (b) Phloem
In most plants, food is transported in the form of
a) Glucose
b) Fructose
c) Galactose
d) Sucrose
Sol: (d) Sucrose
According to the pressure flow mechanism, food is moved from
a) Sink to source
b) Source to sink
c) Pressure at the sink
d) None of the above
Sol: (b) Source to sink
According to the pressure flow mechanism, what is the actual force behind the movement of food in the phloem?
a) Drop in the pressure at the sink end
b) Drop in the pressure at the source end
c) Rise in the pressure at the source end
d) Rise in the pressure at the sink end
Sol: (a) Drop in the pressure at the sink end
What type of circulatory system do humans have
a) Open circulatory system
b) Closed circulatory system
c) Both of the above
d) None of the above
Sol: (b) Closed circulatory system
The average volume of blood (liters) in the adult human body is
a) 6 liters
b) 5 liters
c) 7 liters
d) 8 liters
Sol: (b) 5 liters
How much percentage (%) of plasma is present in the blood
a) 55 %
b) 65 %
c) 75 %
d) 45 %
Sol: (a) 55 %
How much % of cells or cell-like bodies are present in the blood
a) 50 %
b) 60 %
c) 45 %
d) 55 %
Sol: (c) 45 %
Which type of circulatory system do arthropods have
a) Closed circulatory system
b) Open circulatory system
c) Both (a) and (b)
d) None of the above
Sol: (b) Open circulatory system
How much percentage of water in the plasma
a) 90-92 %
b) 92-94 %
c) 80-84 %
d) Only 94 %
Sol: (a) 90-92 %
Blood clotting protein is called
a) Albumin
b) Fibrinogen
c) Globulin
d) Keratin
Sol: (b) Fibrinogen
The protein that maintains the water balance of blood is called
a) Albumin
b) Fibrinogen
c) Keratin
d) Biotin
Sol: (a) Albumin
The normal pH of human blood is
a) 6.4
b) 7.4
c) 8.4
d) 6.5
Sol: (b) 7.4
How many numbers of red blood cells (RBCs) are in cubic millimeters in males?
a) 5 to 5.5 million
b) 5 to 5.5 billion
c) 3 to 3.5 million
d) 6 to 6.5 million
Sol: (a) 5 to 5.5 million

In females, the average red blood cells are in cubic millimeters.
a) 5 to 5.5 million
b) 4 to 4.5 million
c) 4 to 4.5 billion
d) 5 to 5.5 billion
Sol: (b) 4 to 4.5 million
The percentage of the cytoplasm of RBCs is filled with hemoglobin.
a) 90 %
b) 95 %
c) 85 %
d) 80 %
Sol: (b) 95 %
The average life span of RBC (erythrocytes) is
a) 180 days
b) 120 days
c) 30 days
d) 360 days
Sol: (b) 120 days
Which cells play an important role in the body’s defense system
a) Erythrocytes
b) Thrombocytes
c) Basophils
d) Leukocytes
Sol: (d) Leukocytes
The substance is colorless and does not contain pigments.
a) WBCs
b) Platelets
c) RBCs
d) Both (a) and (b)
Sol: (d) Both (a) and (b)
How many WBCs are present in one cubic millimeter?
a) 7000 to 8000
b) 6000 to 7000
c) 5000 to 6000
d) 4000 to 6000
Sol: (a) 7000 to 8000

Which of the following prevents blood clotting
a) Neutrophils
b) Eosinophils
c) Basophils
d) None of the above
Sol: (c) Basophils
In embryonic and foetal life, RBCs are formed in
a) Liver and heart
b) Liver and spleen
c) Liver and bones
d) All of the above
Sol: (b) Liver and spleen
The number of platelets in one cubic millimeter of blood contains
a) 350,000
b) 250,000
c) 150,000
d) 300,000
Sol: (b) 250,000
The average life span of a blood platelet is
a) 7 to 8 days
b) 120 days
c) 4 to 5 days
d) 7 to 8 hours
Sol: (a) 7 to 8 days
Change in a gene is called
a) Alternation
b) Mutation
c) Citation
d) None of the above
Sol: (b) Mutation
The process in which is uncontrolled production of defective white blood cells called
a) Anemia
b) Thalassemia
c) Leukemia
d) All of the above
Sol: (c) Leukemia
The disease is due to mutations in the gene of hemoglobin.
a) Thalassemia
b) Cooley’s anemia
c) Anemia
d) Both (a) and (b)
Sol: (d) Both (a) and (b)
World celebrates international thalassemia day on
a) 8th April
b) 8th May
c) 8th June
d) 9th June
Sol: (b) 8th May
A molecule that can stimulate immune response is called
a) Antibody
b) Antigen
c) Agglutination
d) All of these
Sol: (b) Antigen
When did the ABO blood group system discovered?
a) 1800
b) 1700
c) 1900
d) 1999
Sol: (c) 1900
Who discovered the ABO blood group system?
a) William Harvey
b) Charles Dickens
c) Alexander Fleming
d) Karl Landsteiner
Sol: (d) Karl Landsteiner
Which blood group contains antigen “A”
a) A
b) B
c) AB
d) O
Sol: (a) A
A person has no antigen in the blood group, the blood group is
a) A
b) AB
c) O
d) B
Sol: (c) O
The universal blood donor group is
a) O negative
b) A positive
c) B positive
d) O positive
Sol: (a) O negative
The heart is enclosed a double-walled sac called
a) Valve
b) Pericardium
c) Pericardial fluid
d) All of the above
Sol: (b) Pericardium
How many chambers are in the human heart?
a) One
b) Two
c) Three
d) Four
Sol: (d) Four
The strongest and largest chamber in the heart is
a) Right ventricle
b) Right atrium
c) Left ventricles
d) Left atrium
Sol: (c) Left ventricle
The opening between the right atrium and right ventricle is guarded by a valve known as
a) Cuspid valve
b) Bicuspid valve
c) Tricuspid valve
d) Semilunar valve
Sol; (c) Tricuspid valve
The walls of the left ventricle are
a) Thinner
b) Thickest
c) Both (a) and (b)
d) None of the above
Sol: (b) Thickest
The type of valve is present at the base of the pulmonary trunk
a) Bicuspid valve
b) Tricuspid valve
c) Semilunar valve
d) Pulmonary semilunar valve
Sol: (d) Pulmonary semilunar valve
The opening between the left atrium and left ventricle is guarded by a valve known as
a) Bicuspid valve
b) Tricuspid valve
c) Semilunar valve
d) All of the above
Sol: (a) Bicuspid valve
The type of valve is present at the base of aorta
a) Pulmonary semilunar valve
b) Aortic semilunar valve
c) Bicuspid valve
d) Tricuspid valve
Sol: (b) Aortic semilunar valve
The pathway on which deoxygenated blood is carried from heart to lungs and in return oxygenated blood is carried from lungs to heart is called
a) Pulmonary circulation
b) Systematic circulation
c) Circulation
d) None of the above
Sol: (a) Pulmonary circulation
The alternating relaxations and contractions of heart chambers called
a) Systole
b) Diastole
c) Cell cycle
d) Cardiac cycle
Sol: (d) Cardiac cycle

“One complete cardiac cycle makes one heartbeat.”

Both atria contracts in
a) Cardiac diastole
b) Atria systole
c) Ventricular systole
d) All of the above
Sol: (b) Atria systole

Note:
In one heartbeat,
 Diastole lasts about o.4 seconds.
 Atrial systole takes about 0.1 seconds.
 Ventricular systole lasts about 0.3 seconds.

“Lubb-dubb” can be heard with the help of an apparatus called
a) Barometer
b) Hearing aid
c) Stethoscope
d) Telescope
Sol: (c) Stethoscope
Average human heartbeat per minute in men
a) 60 times
b) 70 times
c) 30 times
d) 180 times
Sol: (b) 70 times
In normal adults, the mass of the heart is about
a) 350-400 g
b) 250-350 g
c) 150-180 g
d) 200-250 g
Sol: (b) 250-350 g
The number of times your heart beats per minute is called
a) Heart rate
b) Pulse rate
c) Cardiac cycle
d) All of the above
Sol: (a) Heart rate
When does our heart take a rest?
a) During sitting
b) Suring sleeping
c) During working
d) Never
Sol: (d) Never
The blood vessels that carry blood away from the heart are called
a) Veins
b) Arteries
c) Capillaries
d) Villi
Sol: (b) Arteries
The pulmonary artery carries which kind of blood
a) Oxygenated
b) De-oxygenated
c) Rich in oxygen
d) All of the above
Sol: (b) De-oxygenated
The hollow internal cavity in which blood flows is called
a) Gastrovascular cavity
b) Internal cavity
c) Arterioles
d) Lumen
Sol: (d) Lumen
The smallest blood vessels are present in tissues.
a) Arteries
b) Veins
c) Capillaries
d) All of the above
Sol: (c) Capillaries
The walls of capillaries are composed of cells.
a) Endothelium
b) Smooth muscle
c) Connective tissue
d) Cardiac muscle
Sol: (a) Endothelium
The blood vessels that carry blood toward the heart are called
a) Veins
b) Arteries
c) Capillaries
d) All of the above
Sol: (a) Veins
The pulmonary vein, carries which kind of blood?
a) Oxygenated blood
b) De-oxygenated blood
c) Both
d) None of the above
Sol: (a) Oxygenated blood
The lumen of veins is __ than that of arteries.
a) Shorter
b) Broader
c) Harder
d) All of the above
Sol: (b) Broader
Which of the following blood vessels have valves that prevent the backflow of blood?
a) Arteries
b) Veins
c) Capillaries
d) Both (a) and (c)
Sol: (b) Veins
Which of the following blood vessels have high pressure?
a) Arteries
b) Veins
c) Capillaries
d) Both (b) and (c)
Sol: (a) Arteries
Which of the following blood vessels are the materials exchanged between the blood and the surrounding tissues?
a) Arteries
b) Capillaries
c) Veins
d) All of the above
Sol: (b) Capillaries
The first scientist who described the pathway of blood circulation
a) Ibn-e-Nafees
b) William Harvey
c) Steve Harvey
d) Steve Jobs
Sol: (a) Ibn-e-Nafees
Who discovered the pumping action of the human heart?
a) William Harvey
b) Steve Harvey
c) Goldsmith
d) Jabir Bin Hayan
Sol: (a) William Harvey
As the aorta passes down through the thorax it becomes
a) Aortic arch
b) Dorsal aorta
c) Both
d) None of the above
Sol: (b) Dorsal aorta
Which artery supplies blood to the ribs?
a) Hepatic artery
b) Superior mesenteric artery
c) Hepatic artery
d) Intercostal artery
Sol: (d) Intercostal artery
Which artery supplies blood to the digestive tract
a) Caeliac artery
b) Superior mesenteric artery
c) Hepatic artery
d) Both (a) and (b)
Sol: (d) Both (a) and (b)
The hepatic artery supplies blood to
a) Heart
b) Liver
c) Kidney
d) Brain
Sol: (b) Liver
Which pair of arteries supply blood to the kidneys?
a) Renal arteries
b) Hepatic arteries
c) Intercostal artery
d) Gonadal artery
Sol: (a) Renal artery
All veins coming from the stomach, spleen, pancreas, and intestine drain into
a) Hepatic portal vein
b) Femoral vein
c) Gonadal vein
d) All of the above
Sol: (a) Hepatic portal vein
Atherosclerosis is commonly referred to as a
a) Narrowing of arteries
b) Hardening of arteries
c) Widening of arteries
d) All of the above
Sol: (a) Narrowing of arteries
If a thrombus dislodges and becomes free-floating it is called
a) Stone
b) Embolus
c) Plaques
d) All of the above
Sol: (b) Embolus
Arteriosclerosis is a general term called
a) Hardening of arteries
b) Narrowing of arteries
c) Widening of arteries
d) All of the above
Sol: (a) Hardening of arteries
Coronary arteries and veins are collectively called
a) Systematic circulation
b) Coronary circulation
c) Pulmonary circulation
d) All of the above
Sol: (b) Coronary circulation
Angina pectoris means
a) Chest pain
b) Lever pain
c) Pain in the left arm
d) Pain in the kidney
Sol: (a) Chest pain
World heart day is held on
a) 28th November
b) 28th September
c) 29th November
d) 29th December
Sol: (b) 28th September
When fibrinogen makes blood clot it separates from blood and the remainder is called
a) Plasma
b) Serum
c) Lymph
d) Puss
Sol: (b) Serum
What is correct about human red blood cells?
a) Have a limited lifespan
b) Are capable of phagocytosis
c) Are multinucleate
d) Produce antibodies
Sol: (a) Have a limited lifespan
The death of heart tissue is called
a) Atherosclerosis
b) Arteriosclerosis
c) Thalassemia
d) Myocardial infarction
Sol: (d) Myocardial infarction

Important definition in this chapter:
 Define pericycle
 Define lenticels
 Define transpiration pull
 Define cohesion tension theory
 Define the pressure flow mechanism
 Define antigen
 Define pericardial fluid
 Define heartbeat
 Define source and sinks.
 Define puss
 Define angioplasty
 Define bypass surgery
Important Questions asked in previous board papers.
 Why transport is necessary for plants?
 How does transpiration occur in plants?
 Explain the opening and closing of the stomata.
 What are the factors affecting the rate of transpiration?
 What are the reasons for the creation of transpirational pull?
 How is plasma separated from blood?
 Difference between erythrocytes and leukocytes.
 Difference between granulocytes and agranulocytes.
 How human heart works?
 How lubb-dubb sound produced?
 Difference between arteries and capillaries
 Difference between atrial systole and ventricular systole