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CBSE Questions for Class 11 Medical Biology Body Fluids And Circulation Quiz 9 - MCQExams.com
CBSE
Class 11 Medical Biology
Body Fluids And Circulation
Quiz 9
Blood platelets produce
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0%
Fibrinogen
0%
Thromboplastin
0%
Haemoglobin
0%
Calcium.
Explanation
Thrombocytes or blood platelets produce thromboplastin that help blood to clot.
So, the correct option is B.
The ratio of RBC to WBC in humans is
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0%
6 : 1
0%
60 : 1
0%
600 : 1
0%
6000 : 1.
RBCs are nucleated in
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0%
Rat
0%
Cat
0%
Frog
0%
Rabbit
Explanation
$$\textbf{Correct option:}$$ $$\textbf{(C)}$$
$$\textbf{Solution:}$$
$$\textbf{Option (A), (B) and (D)}$$
$$\bullet$$ They all are non-mammalian vertebrates.
$$\bullet$$
Thus they need enucleated RBC's for Oxygen transportation.
$$\textbf{Option (C)}$$
$$\bullet$$ Most mammalian red blood cells have lost their nucleus and are highly developed.
$$\bullet$$
Unlike mammalian red blood cells, amphibian red blood cells, such as those seen in frogs, have a DNA-bearing nucleus visible in the cell's core.
$$\bullet$$
Nucleated RBCs are found in all non-mammalian vertebrates.
$$\textbf{Thus the Correct option is (C).}$$
RBC count is carried out by ______________.
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0%
Haemocytometer
0%
Haemoglobinometer
0%
Sphygmomanometer
0%
Electrocardiogram
Explanation
The haemocytometer is a counting-chamber device originally designed and usually used for counting blood cells. The hemocytometer was invented by Louis-Charles Malassez and consists of a thick glass microscope slide with a rectangular indentation that creates a chamber. Hemocytometer remains the most common method used for cell counting around the world. The most frequently used haemocytometer is the Neubauer (or ‘Improved Neubauer’) chamber. Other haemocytometers include the Burker, Thoma and Fuchs-Rosenthal. Using these, the particles (e.g., leucocytes, erythrocytes, thrombocytes, bacteria, fungus spores, pollen) are visually counted under a microscope.
So, the correct answer is 'Haemocytometer'.
Blood transfusion is possible between groups
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0%
Donor A and recipient O
0%
Donor B and recipient A
0%
Donor AB and recipient O
0%
Donor AB and recipient AB
Explanation
A particular blood group can donate and receive blood only from its similar blood group and a particular blood group can receive blood from group O as it is considered to be universal donor. So, blood group O is the universal donor and blood group AB is the universal recipient i.e. it can take blood from any blood group apart from its similar blood group.
So, the correct option is D.
Blood groups were discovered by
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0%
Harvey
0%
Landsteiner
0%
Miller
0%
Lull.
Persons with blood group A possess
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Antigen A and antibodies b
0%
Antigen A and antibodies a
0%
No antigen but antibodies a and b
0%
Antigens A and B but no antibodies.
Explanation
Persons with blood group A possesses antigen A on RBC surface and anti B antibody in the plasma.
So, the correct option is A.
The chief difference between the erythrocytes of man and frog is
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Human erythrocytes have more haemoglobin.
0%
Human erythrocytes have more nuclei.
0%
Human erythrocytes have no nuclei.
0%
Human erythrocytes have less haemoglobin.
Explanation
The biggest difference between human blood cells and frog blood cells is that the red blood cells in the frog have a nucleus as seen by the purple pigment, whereas the human blood cells don't have a nucleus.
So, the correct answer is 'Human erythrocytes have no nuclei.'.
What is true about RBCs in human?
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They transport $$99.5\%$$ of $$O_2$$
0%
They transport $$80\%$$ oxygen, the rest $$20\%$$ being transported by plasma
0%
They do not carry $$CO_2$$ at all
0%
They carry $$20-25\%$$ of $$CO_2$$
Explanation
The correct answer is D
Nearly 20 to 25% Carbon dioxide is transported by RBC in the form of carbaminohemoglobin ;70% is carried as bicarbonates and 7% in the dissolved form in the plasma.
What is percentage of haemoglobin in RBCs?
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0%
$$3\%$$
0%
$$10\%$$
0%
$$28\%$$
0%
$$35\%$$
Explanation
The correct answer is Option D
Hemoglobin is an iron carrying pigment in the RBC, It forms 34 to 35 percent of the RBC
Thrombokinase is produced in
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0%
RBC
0%
WBC
0%
Blood vessels
0%
Blood clotting
Explanation
Thrombokinase is also known as thromboplastin. It is a complex enzyme which aids in clotting of blood. It is present in platelets and some body tissues. When the platelets aggregate at the site of injury, thrombokinase is released from platelets and damaged tissues. Thrombokinase converts prothrombin into thrombin which acts as an enzyme and converts fibrinogen into fibrin threads. The fibrin threads form a clot at the site of injury. Hence thrombokinase is produced in blood clotting.
So, the correct answer is 'Blood clotting'
Thromboplastin is produced by _______.
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0%
Damaged tissues
0%
Blood platelets
0%
Both blood platelets and damaged tissues
0%
Prothrombin
A blood group having no antigen but possessing both a and b antibodies is:
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0%
A
0%
O
0%
B
0%
AB
Explanation
Persons with blood group O possess no antigen on RBC surface but they have both antibodies a and b in plasma.
So, the correct option is B.
The cells which do not respire.
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0%
Epidermal cells
0%
Sieve cells
0%
Cortical cells
0%
Erythrocytes
Explanation
Since erythrocytes are devoid of nucleus and organelles including mitochondria, they cannot carry out the process of respiration. Thus, they do not consume any oxygen during transportation.
So, the correct option is 'Erythrocytes'.
Husband and wife should know their Rh factors because the situation can be serious due to biological incompatibility in one of the following cases
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0%
$$Rh^+$$ husband and $$Rh^+$$ wife
0%
$$Rh^-$$ husband and $$Rh^-$$ wife
0%
$$Rh^-$$ husband and $$Rh^+$$ wife
0%
$$Rh^+$$ husband and $$Rh^-$$ wife.
Explanation
Erythroblastosis foetalis is a serious condition leading to fatality of the embryo if husband is Rh positive and wife is Rh negative.
So, the correct option is D.
What cannot be the blood groups of the parents of a baby having blood group A?
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0%
O and O
0%
O and A
0%
A and O
0%
A and A.
Explanation
Baby is of blood group A and that indicates blood has antigen A and anti b.
So mother and father should have blood groups with antigen A and anti b i.e. blood groups of either A and B or AB.
So, the correct option is A.
A woman with blood group O marries a man of AB blood group. The blood group of their child would be
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0%
AB and O
0%
A or B
0%
AB
0%
O.
A child of blood group O cannot have parents of blood groups
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0%
AB and AB/O
0%
A and B
0%
B and B
0%
O and O.
Parents belong to blood group A and B. Blood group of their child would be
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0%
A or B
0%
O
0%
AB
0%
All the above.
Blood group A has
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0%
Antibody a on RBC
0%
Antibody a in plasma
0%
Antigen A on RBC
0%
Antigen A in plasma.
A child has blood group B. Mother has blood group A. The blood group of the father would be
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0%
O
0%
O or A
0%
B or AB
0%
A.
Explanation
Child has blood group B i.e. RBC has antigen B and plasma has anti a.
Mother is of blood group A so it has A antigen and plasma has anti b.
So the child has acquired antigen B from father's blood. Hence father is of blood group B or AB both of which will have antigen B.
So, the correct option is C.
In case of emergency (e.g., serious accident with great blood loss) which blood group could be safely transfused
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0%
AB $$Rh^-$$
0%
O $$Rh^+$$
0%
AB $$Rh^+$$
0%
O $$Rh^-$$.
O blood group is universal donor because the blood has
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0%
Antigen A
0%
Antigen B
0%
Both antigens A and B
0%
No antigens.
Which of the following genotypes have blood group B?
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0%
A/B, +/+
0%
A/A, +/A
0%
+/+, +/+
0%
B/B, +/B.
Circulation of blood was discovered by
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0%
Darwin
0%
Harvey
0%
Aristotle
0%
Lister.
The genotype of B-group father of an O-group child is
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0%
$$I^O I^O$$
0%
$$I^B I^B$$
0%
$$I^A I^B$$
0%
$$I^O I^B$$.
Increase in number of leukocytes beyond normal indicates
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0%
Anaemia
0%
Infection
0%
Increased defence against pathogen
0%
Non-formation of RBC.
Explanation
A high white blood cell(leukocyte) count isn't indicative of a specific disease, but it can indicate general problems, such as infection, stress, inflammation, trauma, allergy, or certain diseases. That's why a high white blood cell count usually requires further investigation.
So, the correct answer is 'Infection'.
Parents with blood groups O and AB cannot have AB child as
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0%
Gene for O is dominant over gene for B
0%
Gene for O is dominant over gene for A
0%
Genes for A and B are absent in one of the parents
0%
Gene for A or B is absent in one of the parents.
The approximate number of leucocytes present in one $$mm^3$$ of blood is:
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0%
5000-8000
0%
2000-3000
0%
8000-13000
0%
1 million to 1.5 million
Explanation
Leucocytes or white blood cells (WBCs) are colorless, nucleated, and motile cells of the blood. Their normal count is 5000- 8000 cells per $$mm^3$$ of blood. WBCs (White blood cells) can be granulocytes or agranulocytes, depending upon whether they have granules or not.
So, the correct answer is option A.
During blood coagulation, vitamin K helps in
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0%
Formation of prothrombin
0%
Formation of thromoboplastin
0%
Conversion of fibrinogen into fibrin
0%
Conversion of prothrombin to thrombin.
Explanation
During blood clotting procedure, vitamin K helps in formation of prothrombin (factor ii) because it is a vitamin K dependant coagulation factor.
So, the correct option is A.
Thrombocytes have a life of
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0%
3-4 weeks
0%
4-5 weeks
0%
5-9 days
0%
None of the above.
Choose the correct function of lymph.
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0%
Carries digested and absorbed fat from the intestine
0%
Returns RBCs and WBCs to lymph nodes
0%
Drains excess fluid from extra cellular space back into the blood
0%
Both A and D
Explanation
Correct Option:
D
Explanation:
Lymph
carries oxygen, hormones and nutrients to all parts of the body.
It transports antibodies and lymphocytes into the blood.
It maintains the
composition
of tissue fluid and the volume of blood.
It drains
excess
fluid present between the cells to the blood
.
It prevents
invasion
of microbes and foreign substances inside the lymph nodes.
Hence, the correct functions of lymph are
carries digested and absorbed fat from the intestine
and d
rains excess fluid from extra cellular space back into the blood.
A blood group with no antibodies but with both antigens is
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0%
O
0%
A
0%
B
0%
AB.
In circulatory system, valves occur in
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0%
Heart and blood vessels of both vertebrates and invertebrates as well as vertebrate lymphatics
0%
Both vertebrate and invertebrate hearts
0%
Vertebrate heart only
0%
Both vertebrate and invertebrate hearts and their blood vessels.
Mitochondria are absent in
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0%
WBC
0%
Cartilage
0%
RBC
0%
All the above.
In ABO system of blood grouping, transfusion is not possible from
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0%
A to AB
0%
B to AB
0%
O to AB
0%
A to O
Explanation
In the ABO system of blood grouping, A blood group person have A antigen on the surface of the RBC and have antibodies against antigen B in their plasma.
B blood group person has B antigen on the surface of the RBC and has antibodies against antigen A in their plasma.
AB blood group person has both A and B antigen on the surface of the RBC and has no antibodies in their plasma.
O blood group person has no antigen on the surface of the RBC and has antibodies against both antigens A and B in their plasma.
As O blood group person has antibodies against both antigen A and B we cannot transfuse A blood group to them.
So, the correct answer is option D.
Which is false?
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0%
RBCs are also called leucocytes
0%
White blood corpuscles are part of body's defence mechanism
0%
Platelets are also called thrombocytes
0%
Oxygen is carried in blood after combining with haemoglobin.
Explanation
A. RBCs (Red blood cells) are also called erythrocytes.
B. White blood cells are also called as leucocytes. They play an important role in immunity and body's defence mechanism.
C. Platelets are also called thrombocytes. They play an important role in clotting of blood.
D. Haemoglobin is a respiratory pigment which transports oxygen in the body. It combines with oxygen to form oxyhaemoglobin which dissociates to release oxygen in body tissues.
Hence, statement A is false.
So, the correct answer is 'RBCs are also called leucocytes'.
Person with AB blood group can
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0%
Not receive universally
0%
Universally donate
0%
Universally receive
0%
Receive only from O.
Explanation
Blood type AB is considered as a universal recipient because individuals of this blood group do not have the anti- A ( against A antigen) or anti- B (against B antigen) antibodies in the blood plasma only have A and B antigen on the surface of RBC.
When blood from a person with another blood group supposes B blood group (or any other blood group) is injected to a AB blood group person there will be no immune response generated in the recipient since there are no antibodies.
Hence a person with AB blood group can universally receive blood from any other blood group.
So the correct answer is option C.
A fully mature human RBC has:
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0%
A nucleus
0%
No nucleus
0%
Mitochondria
0%
Golgi bodies
Explanation
Mature human RBCs are roughly circular and non-nucleated. Absence of nucleus imparts RBCs a biconcave disc-like shape. The concave surface of RBC increases the surface area of the cell and facilitates the diffusion of oxygen and carbon dioxide in and out of the cell. They also lose most of the cell organelles like mitochondria, Golgi bodies, ribosomes, etc. during maturation to become efficient oxygen carriers.
So, the correct answer is option B.
Heart beats originate from
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0%
Left atrium
0%
Right ventricle
0%
Cardiac muscles
0%
Pace maker.
Explanation
SA node (sino atrial node) is body's natural pacemaker from where heart beat originates.
So, the correct option is D.
Most common blood group is
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0%
AB
0%
A
0%
B
0%
O.
Match the column.
Column I
Column II
a
Superior Vena Cava
p
Carries deoxygenated blood to lungs
b
Inferior Vena Cava
q
Carries oxygenated blood from lungs
c
Pulmonary Artery
r
Brings deoxygenated blood from lower parts of body to right atrium
d
Pulmonary vein
t
Brings deoxygenated blood from upper parts of body into right atrium
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0%
a - q, b - t, c - r, d - p
0%
a - t, b - p, c - q, d - r
0%
a - t, b - r, c - p, d - q
0%
a - t, b - p, c - r, d - q
Explanation
a. Superior vena cava brings deoxygenated blood from upper parts of body (head and neck) to right atrium.
b. Inferior vena cava brings deoxygenated blood from lower parts of the body (pelvis, lower limbs, gonads, muscles of back, kidneys, liver etc.) to right atrium.
c. Pulmonary artery carries deoxygenated blood from the right ventricle to the lungs.
d. Pulmonary vein carries oxygenated blood from the lungs to the left auricle.
So, the correct answer is '
a - t, b - r, c - p, d - q'.
Which is correct about leucocytes?
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0%
They are red coloured.
0%
They can cross capillaries.
0%
They are enucleate.
0%
Decrease in their number causes leukemia.
Explanation
A. Leucocytes are white blood cells (WBCs).
B. They are capable of amoeboid movement due to which they can cross or squeeze out of the capillaries into tissues and this process is known as diapedesis.
C. They are nucleated i.e., they have a nucleus.
D. Increase in their number cause leukemia which is cancer of WBCs.
Hence, only statement B is correct.
So, the correct answer is 'They can cross capillaries'.
Problem related to Rh factor arises when $$Rh^+$$ and $$Rh^-$$ bloods mix up
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0%
In test tube
0%
Through transfusion
0%
Through pregnancy
0%
Both A and C.
Blood group B means the person
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0%
Can form antibody for B
0%
Cannot form antibody for B
0%
Can receive blood of AB group
0%
Cannot receive blood group O.
Explanation
Blood group B means they have B antigen on the RBC surface and anti A antibody. Therefore, they cannot form antibody for B.
So, the correct option is B.
Person with AB blood group can receive blood from _______.
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0%
AB only
0%
O only
0%
Both A and B
0%
All the above
Explanation
A person with AB blood group can receive blood from A, B, and O blood group person because a person with blood group AB has both A and B antigen on their RBCs, and thus, no antibodies are produced against either of the antigens.
AB blood group is also known as the universal recipient.
Hence, the correct answer is option D, i.e., All of the above.
Blood protein which initiates blood coagulation is
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0%
Prothrombin
0%
Thrombin
0%
Fibrinogen
0%
Fibrin
Explanation
Prothrombin is a plasma protein essential for blood clotting. Whenever there is an injury, prothrombin activator complex is formed. Prothrombin is converted into thrombin by activators. Thrombin acts as an enzyme and converts plasma protein fibrinogen into fibrin threads which form a clot at the site of injury and bleeding is stopped.
So, the correct answer is 'Prothrombin'.
A sample of blood shows clumping with antiserum A but not with antiserum B. The blood group would be
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0%
O
0%
A
0%
B
0%
AB.
Explanation
Clumping with antiserum A means the blood sample contains antigen A and no clumping with antiserum B indicates the presence of anti B antibody in blood sample. This correlates to blood group A.
So, the correct option is B.
Rh factor occurs in
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0%
All reptiles
0%
Man and Rhesus Monkey
0%
All mammals
0%
All vertebrates.
Explanation
Rh factor
, also called
Rhesus factor
, is a type of protein found upon the red blood cells. The protein is genetically inherited (passed down from our parents). If we have the protein, we are
Rh
-positive. If we did not inherit the protein, we are
Rh
-
negative
. It occurs in man and Rhesus monkey.
So, the correct option is B.
Which one is not a WBC?
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0%
Lymphocyte
0%
Thrombocyte
0%
Monocyte
0%
Basophil.
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