Yearly Archives: 2021

In This Post we are  providing Chapter-18 Body Fluids and Circulation NCERT MCQ for Class 11 Biology which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These MCQS  can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.

NCERT MCQ ON BODY FLUIDS AND CIRCULATION

Question 1.
In developing embryo RBCs are formed in
(a) Lymph node
(b) Bone marrow
(c) Liver
(d) Spleen

Answer: (c) Liver

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Question 2.
In humans, blood passes from the post caval to the diastolic right atrium of heart due to:
(a) Pressure difference between the post caval and atrium
(b) Pushing open of the venous valves
(c) Suction pull
(d) Stimulation of the Sino auricular node

Answer: (a) Pressure difference between the post caval and atrium

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Question 3.
When body tissues are injured resulting in the loss of blood, the process of blood clot begins and the blood platelets release
(a) Fibrinogen
(b) Thrombin
(c) Prothrombin
(d) Thromboplastin

Answer: (d) Thromboplastin

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Question 4.
An adult human has systolic and diastolic pressures as:
(a) 80 mm Hg and 120 mm Hg
(b) 120 mm Hg and 80 mm Hg
(c) 50 mm Hg and 80 mm Hg
(d) 80 mm Hg and 80 mm Hg

Answer: (b) 120 mm Hg and 80 mm Hg

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Question 5.
Duration of cardiac cycle is
(a) 0.7 sec
(b) 0.9 sec
(c) 0.8 sec
(d) 0.11 sec

Answer: (c) 0.8 sec
Explanation:
Duration of cardiac cycle is 0.8 seconds.

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Question 6.

In the above picture Q represents
(a) excitation of the atria
(b) depolarization of ventricles
(c) beginning of systole
(d) repolarization

Answer: (c) beginning of systole
Explanation:

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Question 7.
Oxygenated blood occurs in
(a) Pulmonary artery
(b) Right atrium
(c) Right ventricle
(d) Pulmonary vein

Answer: (d) Pulmonary vein

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Question 8.
The cells lining the blood vessels belong to the category of
(a) Columnar epithelium
(b) Connective tissue
(c) Smooth muscle tissue
(d) Squamous epithelium

Answer: (d) Squamous epithelium

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Question 9.
Heart failure occurs due to
(a) heart stops beating
(b) damage of heart muscles
(c) congestion of lungs
(d) all of the above

Answer: (c) congestion of lungs
Explanation:
Heart failure occurs when heart stops pumping blood effectively enough to meet the body needs.
It occurs mainly due to congestion of lungs.

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Question 10.
Artificial pace maker is transplanted in
(a) Inter auricular septum
(b) Below the collar bone
(c) Inter ventricular septum
(d) Right auricle

Answer: (b) Below the collar bone

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Question 11.
Which of the following statement/statements can be related to erythroblastosis foetalis?
(a) Severe anemia and jaundice to the baby.
(b) Can be avoided by giving anti-Rh antibodies to mother immediately after delivery of the first child.
(c) Rh-antibodies from the Rh -ve mother destroys foetal RBCs.
(d) All of the above

Answer: (d) All of the above
Explanation:
Erythroblastosis fetalis occurs if Rh-antibodies from the Rh -ve mother destroys foetal RBCs of Rh +ve foetus.

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Question 12.
Among the following stem cells, which are found in the umbilical cord?
(a) Cord blood stem cells
(b) Adult stem cells
(c) Embryonic stem cells
(d) All of the above

Answer: (a) Cord blood stem cells

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Question 13.
If vagus nerve is cut the heart beat
(a) increases
(b) decreases
(c) will not be affected
(d) will stop immediately

Answer: (a) increases

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Question 14.
If due to some injury the chordae tendinea of the tricuspid valve of the human heart is partially non-functional, what will be the immediate effect?
(a) The flow of blood into the pulmonary artery will be reduced
(b) The flow of blood into the aorta will be slowed down
(c) The pacemaker will stop working
(d) The blood will tend to flow back into the left atrium

Answer: (a) The flow of blood into the pulmonary artery will be reduced

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Question 15.
Heparin is
(a) Anti-allergic
(b) Blood diluter
(c) Anticoagulant
(d) Antiseptic

Answer: (c) Anticoagulant

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In This Post we are  providing Chapter-17 Breathing and Exchange of Gases NCERT MCQ for Class 11 Biology which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These MCQS  can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.

NCERT MCQ ON BREATHING AND EXCHANGE OF GASES

Question 1 : When CO₂ concentration in blood increases, breathing becomes

• a) faster and deeper
• b) slow and deep
• c) there is no effect on breathing
• d) shallower and slow

Answer : faster and deeper

Question 2 : The largest quantity of air that can be expired after a maximal inspiratory effort is called

• a) vital capacity
• b) residual volume
• c) tidal volume
• d) total lung volume

Answer : vital capacity

Question 3 : Which one of the following statements is incorrect ?

• a) In insects, circulating body fluids serve to distribute oxygen to tissues
• b) The principle of counter current flow facilitates efficient respiration in gills of fishes
• c) The residual air in lungs slightly decreases the efficiency of respriration in mammals.
• d) None of these

Answer : In insects, circulating body fluids serve to distribute oxygen to tissues

Question 4 : Emphysema develops mainly because of

• a) Spasm of the smooth muscles of bronchioles
• b) Cigarette smoking
• c) Inflammation of the alveoli
• d) Allergy or hypersensitisation

Answer : Spasm of the smooth muscles of bronchioles

Question 5 : During inspiration the diaphragm

• a) contracts and flattens
• b) relaxes to become dome-shaped
• c) shows no change
• d) None of these

Answer : contracts and flattens

Question 6 : The volume of air breathed in and out during normal breathing is called

• a) Tidal volume
• b) Explratory reserve volume
• c) Vital capacity
• d) None of these

Answer : Tidal volume

Question 7 : What would happen if human blood becomes acidic (low pH)

• a) Oxygen carrying capacity of haemoglobin decreases
• b) RBCs count increases
• c) RBCs count decreases
• d) Oxygen carying capacity of haemoglobin increases

Answer : Oxygen carrying capacity of hemoglobin decreases

Question 8 : Even when there is no air in it, human trachea does not collapse due to presence of

• a) Cartilaginous rings
• b) Turgid pressure
• c) Bony rings
• d) Chitinous rings

Answer : Cartilaginous rings

Question 9 : The structure which does not contribute to the breathing movements in mammals is

• a) Larynx
• b) Diaphragm
• c) Ribs
• d) Intercostal muscles

Answer : Larynx

Question 10 : In emphysema

• a) Gas exchange area of lungs is reduced
• b) Gas exchange area of lungs is increased
• c) Trachea gets narrowed
• d) Larynx is permanently closed

Answer : Gas exchange area of lungs is reduced

Question 11 : Which of the following changes occur in diaphragm and intercostal muscles when expiration of air takes place?

• a) External intercostal muscles and diaphargm relax
• b) External intercostal muscles and diaphargm contract
• c) External intercostal muscles contract and diaphargm relaxes
• d) External intercostal muscles relax and diaphargm contracts

Answer : External intercostal muscles and diaphragm relax

Question 12 : When you exhale, the diaphragm

• a) relaxes and arches
• b) relaxes and flattens.
• c) contracts and arches
• d) contracts and flattens

Answer : relaxes and arches

Question 13 : Smoking destroys the cilia in the respiratory passageways. This

• a) makes it harder to keep the lungs clean
• b) slows blood flow through lung blood vessels
• c) decreases the surface area for respiration.
• d) makes it harder to move air in and out of the lungs

Answer : makes it harder to keep the lungs clean

Question 14: Gas flows into the lungs of mammals during inspiration because

• a) The pressure in the lungs falls below atmospheric pressure
• b) The pressure in the lungs rises above atmospheric pressure.
• c) The volume of the lungs decreases
• d) The diaphragm moves upward toward the lungs

Answer : The pressure in the lungs falls below atmospheric pressure

Question 15 : The function of the mucus elevator in the mammalian respiratory system is to

• a) trap and remove particulate matter that has entered the respiratory system.
• b) stimulate contraction of rib musculature during forcible exhalation
• c) produce negative pressure during inhalation
• d) move surfactant from the bronchi to the alveoli

Answer : trap and remove particulate matter that has entered the respiratory system.

In This Post we are  providing Chapter-16 Digestion and Absorption NCERT MCQ for Class 11 Biology which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These MCQS  can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.

NCERT MCQ ON DIGESTION AND ABSORPTION

Question 1 : Jaundice is a disorder of

• a) Digestive system
• b) Excretory system
• c) Skin and eyes
• d) Circulatory system

Answer : Digestive system

Question 2 : Which one of the following pairs of food components in humans reaches the stomach totally undigested ?

• a) Fat and cellulose
• b) Protein and starch
• c) Starch and cellulose
• d) Starch and fat

Answer : Fat and cellulose

Question 3 : Which of following teeth are lophodont?

• a) Premolar and molar
• b) Premolar and incisor
• c) Incisor and canine
• d) Canine and premolar

Answer : Premolar and molar

Question 4 : Oxyntic cells are located in

• a) Gastric epithelium and secrete HCl
• b) Kidneys and secrete renin
• c) Gastric epithelium and secrete pepsin
• d) Islets of Langerhans

Answer : Gastric epithelium and secrete HCl

Question 5 : Continued consumption of a diet rich in butter, red meat and eggs for a long period may lead to

• a) hypercholesterolemia
• b) urine laden with ketone bodies
• c) kidney stones
• d) vitamin A toxicity

Answer : hypercholesterolemia

Question 6 : Which one of the following is a matching pair of a substrate and its particular digestive enzyme?

• a) Starch — maltase
• b) Maltose — steapsin
• c) Lactose — rennin
• d) Casein — chymotrypsin

Answer : Starch — maltase

Question 7 : Which one of the following is a matching pair of a vitamin and the deficiency disease related with it ?

• a) Niacin — pellagra
• b) Calciferol — scurvy
• c) Thiamine — xerophthalmia
• d) Riboflavin — beri beri

Answer : Niacin — pellagra

Question 8 : Which one of the following pairs of the cells with their secretion is correctly matched?

• a) Oxyntic cells – A secretion with pH between 2.0 and 3.0.
• b) Alpha cells of Islets of Langerhans -Secretion that decreases blood sugar level.
• c) Kupffer cells – A digestive enzyme that hydrolysis nucleic acids.
• d) None of these

Answer : Oxyntic cells – A secretion with pH between 2.0 and 3.0.

Question 9 : “Kwashiorkor’ and ‘Beri-Beri’ are

• a) deficiency diseases
• b) infectious diseases
• c) communicable diseases
• d) None of the above

Answer : Deficiency diseases

Question 10 : First milk produced after child birth is called

• a) colostrum
• b) cerumen
• c) true milk
• d) sebum

Answer :  Colostrum

Question 11 : Cirrhosis of liver is caused by the chronic intake of

• a) Alcohol
• b) Tobacco (Chewing)
• c) Cocaine
• d) Opium

Answer : Alcohol

Question 12 : The sphincter of Oddi is present between

• a) Hepatopancreatic duct and duodenum
• b) Hepatic duct and cystic duct
• c) Pyloric stomach and duodenum
• d) Oesophagus and cardiac stomach

Answer : Hepatopancreatic duct and duodenum

Question 13 : Layer of cells that secrete enamel of tooth is

• a) Ameloblast
• b) Dentoblast
• c) Osteoblast
• d) Odontoblast

Answer : Ameloblast

Question 14 : Cow’s milk is slightly yellowish in colour due to the presence of

• a) Riboflavin
• b) Xanthophyll
• c) Xanthophyll and Carotene
• d) Carotene

Answer : Riboflavin

Question 15 : Accessory excretory organs of man are

• a) skin, lungs, liver and intestine
• b) only skin and lungs
• c) only skin and liver
• d) only skin

Answer : skin, lungs, liver and intestine

In This Post we are  providing Chapter-15 Plant Growth and Development NCERT MCQ for Class 11 Biology which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These MCQS  can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.

NCERT MCQ ON PLANT GROWTH AND DEVELOPMENT

Question 1.

Which plant growth regulator is the derivative of carotenoids?
(a) Auxin
(b) Gibberellic acid
(c) Cytokinin
(d) Abscisic acid

Answer (d) Abscisic acid

Question 2.
Intercalary meristems are of
(a) Permanent nature
(b) Temporary nature
(c) Some are permanent some temporary
(d) None of these

Answer: (b) Temporary nature

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Question 3.
Cells of fibers and tracheid’s elongate during
(a) Phase of cell division
(b) Phase of cell elongation
(c) Phase of cell maturation
(d) Phase of cell differentiation

Answer: (a) Phase of cell division

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Question 4.
Typical plant growth shows _________ curve.
(a) J-shaped
(b) S-shaped
(c) I-shaped
(d) Parabolic

Answer: (b) S-shaped
Explanation:
Typical plant growth represents sigmoid curve.

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Question 5.
Exponential growth of the plants is express as W₁ = W₀ e^rt r represents
(a) ability of the plant to produce new cells
(b) efficiency index
(c) relative growth rate
(d) all of the above

Answer: (d) all of the above
Explanation:
r is the relative growth rate and also measures the ability of the plant to produce new plant material (efficiency index).

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Question 6.
Opening of floral buds into flowers, is a type of:
(a) Autonomic movement of variation
(b) Autonomic movement of locomotion
(c) Autonomic movement of growth
(d) Paratonic movement of growth

Answer: (c) Autonomic movement of growth

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Question 7.
Which one is incorrect?
(a) Epiblast is presumptive ectoderm and mesoderm
(b) Hypoblast is presumptive endoderm
(c) Hypoblast is presumptive mesoderm
(d) Upper layer of cells in blastoderm is epiblast

Answer: (c) Hypoblast is presumptive mesoderm

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Question 8.
The stage of rapid cell division just after fertilization is
(a) Organogenesis
(b) Cleavage
(c) Gastrulation
(d) Growth

Answer: (b) Cleavage

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Question 9.
Plants grow throughout their life due to
(a) presence of meristems
(b) presence of vascular cambium
(c) presence of xylem and phloem
(d) presence of tracheid

Answer: (a) presence of meristems
Explanation:
Plants growth throughout their life due to the presence of meristems at certain locations in their body.

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Question 10.
Liver and pancreas arise from
(a) Foregut
(b) Midgut
(c) Hindgut
(d) None of these

Answer: (a) Foregut

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Question 11.
Which one of the followings is a gaseous plant hormone?
(a) Ethylene
(b) Gibberellin
(c) IAA
(d) Abscisic acid

Answer: (a) Ethylene

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Question 12.
To prevent over – ripening, bananas should be
(a) given a dip in ascorbic acid
(b) maintained at room temperature
(c) refrigerated
(d) stored at the top of refrigerator

Answer: (c) refrigerated

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Question 13.
Growth in dorsiventral leaf is measured in terms of
(a) length of leaf
(b) increase in cell number
(c) surface area increase
(d) none of these

Answer: (c) surface area increase
Explanation:
Increase in surface area denotes the growth in a dorsiventral leaf.

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Question 14.
Mechanism of development was explained by
(a) Hans Dietrich
(b) Spemann
(c) Both a and b
(d) Haemmerling

Answer: (c) Both a and b

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Question 15.
The ability to regain or recover the lost or injured part of body is
(a) Aging
(b) Regeneration
(c) Abnormal development
(d) Primary induction

Answer: (b) Regeneration

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In This Post we are  providing Chapter-14 Respiration in Plants NCERT MCQ for Class 11 Biology which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These MCQS  can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.

NCERT MCQ ON RESPIRATION IN PLANTS

Question 1 : In Krebs’s cycle, the FAD participates as electron acceptor during the conversion of

• a) succinic acid to fumaric acid
• b) fumaric acid to malic acid
• c) succinyl CoA to succinic acid
• d) None of these

Answer : succinic acid to fumaric acid

Question 2 : The major reason that glycolysis is not as energy productive as respiration is that

• a) pyruvate is more reduced than CO₂; it still contains much of the energy from glucose
• b) it does not take place in a specialized membrane-bound organelle.
• c) it is the pathway common to fermentation and respiration
• d) None of these

Answer :  pyruvate is more reduced than CO₂; it still contains much of the energy from glucose

Question 3 : Which of the following is a 4-carbon compound?

• a) Oxaloacetic acid
• b) Phosphoglyceric acid
• c) Citric acid
• d) Phosphoenol pyruvate

Answer : Oxaloacetic acid

Question 4 : Which of the following is a biological uncoupler of oxidative phosphorylation ?

• a) Thermogenin
• b) 2, 4 – Dichlorophenoxy acetic acid
• c) 2, 4 – Dinitrophenol
• d) Ethylene diaminotetra acetic acid

Answer : Thermogenin

Question 5 : Which of the following is not true for oxidative phosphorylation?

• a) It uses oxygen as the initial electron donor.
• b) It involves the redox reactions of electron transport chain
• c) It involves an ATP synthase located in the inner mitochondrial membrane.
• d) It depends on chemiosmosis

Answer : It uses oxygen as the initial electron donor.

Question 6:  Final electron acceptor in oxidative phosphorylation is

• a) oxygen
• b) hydrogen
• c) cytochrome
• d) None of these

Answer : oxygen

Question 7 : Quantasomes are found in

• a) chloroplast
• b) mitochondria
• c) lysosome
• d) None of these

Answer : chloroplast

Question 8 : Which of the following is an important intermediate found in all the types of respiration ?

• a) Pyruvic acid
• b) Tricarboxylic acid
• c) Acetyl CoA
• d) Oxaloacetate

Answer : Pyruvic acid

Question 9 : Incomplete oxidation of glucose into pyruvic acid with several intermediate steps is known as

• a) Glycolysis
• b) Krebs cycle
• c) TCA-pathway
• d) HMS-pathway

Answer : Glycolysis

Question 10 : Common enzyme in glycolysis and pentose phosphate pathways is

• a) hexokinase
• b) fumarase
• c) aconitase
• d) dehydrogenase

Answer : hexokinase

Question 11 : One of the following is common to glycolysis as well as Krebs cycle in eukaryotes

• a) Substrate level phosphorylation
• b) Photophosphorylation
• c) Localization in mitochondria
• d) None of these

Answer : Substrate level phosphorylation

Question 12 : A mutant cell lacking mitochondria will show

• a) Inability to oxidize carbohydrates and fats
• b) Inability to synthesize glucose
• c) Inability to oxidize fats
• d) Inability to oxidize carbohydrates

Answer : Inability to oxidize carbohydrates and fats

Question 13 : During the early stages of alcoholic fermentation there is a high rate of growth of yeast. After some time the rate decreases. Which of the following conditions in the culture medium is least likely to have caused this?

• a) Depletion of oxygen
• b) Depletion of mineral salts
• c) Accumulation of waste products
• d) Depletion of glucose

Answer : Depletion of oxygen

Question 14 : Hexose monophosphate shunt does not take place when

• a) NAD is available
• b) NAD is not available due to shortage of oxygen
• c) Glucose is the substrate
• d) Oxygen is not enough

Answer : NAD is available

Question 15 : Chemiosmosis theory of ATP synthesis in the chloroplasts and mitochondria is based on

• a) proton gradient
• b) accumulation of Na ions
• c) membrane potential
• d) None of these

Answer : proton gradient

Class 11 Term-2 Political science Syllabus & Video Lecture

	Part A: Indian Constitution at Work
1	Chapter 4 Executive
2	Chapter 5 Legislature
3	Chapter 6 Judiciary
	Part B: Political Theory
4	Chapter 2 Freedom
5	Chapter 3 Equality
6	Chapter 4 Social Justice

One-Shot Video Lecture + MCQs Practice Sessions

Class 11 Term-2 Geography Syllabus & Video Lecture

Part A:	Fundamentals of Physical Geography
1	Climate
2	Chapter 13 Water (Oceans)
3	Chapter 14 Movements of Ocean Water
4	Chapter 15 Life on the Earth
5	Chapter 16 Biodiversity and Conversation
Part B:	India – Physical Environment
1	Chapter 4 Climate
2	Chapter 5 Natural Vegetation
3	Chapter 6 Soils

One-Shot Video Lecture + MCQs Practice Sessions

Class 11 Term-1 Geography Syllabus & Video Lecture

	Part A: Fundamentals of Physical Geography
1	Unit-1 Geography as a Discipline
2	Unit- 2 The Earth
3	Unit-3 Landforms
	Part B: India – Physical Environment
4	Unit-1 Introduction
5	Unit-2 Physiography

One-Shot Video Lecture + MCQs Practice Sessions

Class 11 Term-2 Biology Syllabus & Video Lecture

1	Chapter-10: Cell Cycle and Cell Division
2	Chapter-13: Photosynthesis in Higher Plants
3	Chapter-14: Respiration in Plants
4	Chapter-15: Plant – Growth and Development
5	Chapter-17: Breathing and Exchange of Gases
6	Chapter-18: Body Fluids and Circulation
7	Chapter-19: Excretory Products and their Elimination
8	Chapter-20: Locomotion and Movement
9	Chapter-21: Neural Control and Coordination
10	Chapter-22: Chemical Coordination and Integration

One-Shot Video Lecture + MCQs Practice Sessions

Class 11 Term-2 Mathematics Syllabus & Video Lecture

1	Chapter 3 Trigonometric Functions
2	Chapter 6 Linear Inequalities
3	Chapter 7 Permutations and Combinations
4	Chapter 11 Conic Sections
5	Chapter 12 Introduction to Three Dimensional Geometry
6	Chapter 13 Derivatives
7	Chapter 16 Probability

One-Shot Video Lecture + MCQs Practice Sessions