R4RIN – MCQs, Mock Tests | NCERT Class 11 MCQ Questions for Class 11 Biology sets 4

Growth in dorsiventral leaf is measured in terms of

1. length of leaf
2. increase in cell number
3. surface area increase
4. None of these

✅ Correct Answer: 3

Mechanism of development was explained by (a)

1. Hans Dietrisch
2. Spemann
3. Both a and b
4. Haemmerling

✅ Correct Answer: 3

Which growth hormone accerlates the malting process in brewing industry?

1. Auxins
2. Gibberellins
3. Ethylene
4. Cytokinins

✅ Correct Answer: 2

Which plant growth regulator is the derivative of carotenoids?

1. Auxin
2. Gibberelic acid
3. Cytokinin
4. Abscisic acid

✅ Correct Answer: 4

Typical plant growth shows _________ curve.

1. J-shaped
2. S-shaped
3. I-shaped
4. Parabolic

✅ Correct Answer: 2

Mobilisation of stored food in germinating seeds is triggered by

1. auxins
2. cytokinins
3. gibberellins
4. ethylene

✅ Correct Answer: 3

Which part of brain causes nausea?

1. Pons
2. Hypothalamus
3. Parietal lobe
4. Medulla

✅ Correct Answer: 4

Correct enzyme-substrate pair is

1. Maltose-lactase
2. Protein-amylase
3. Carbohydrate-lipase
4. Casein-rennin

✅ Correct Answer: 4

Peyers patches found in the small intestine are

1. Epithelial tissue
2. Glandular tissue
3. Lymphatic tissue
4. Haemopoietic tissue

✅ Correct Answer: 3

During prolonged fasting, in what sequence are the following organic compounds used up by the body?

1. First carbohydrates, next proteins and lastly lipids
2. First carbohydrates, next fats and lastly proteins
3. First fats, next carbohydrates and lastly proteins
4. First proteins next lipids and lastly carbohydrates

✅ Correct Answer: 2

In glycolysis ultimately

1. starch is converted into glucose
2. glucose is converted into fructose
3. protein is converted into glucose
4. glucose is converted into pyruric acid

✅ Correct Answer: 4

The HCl in gastric juice converts:

1. Disaccharide to monosaccharide
2. Pepsinogen to pepsin
3. Prorennin to rennin
4. Polypeptide to peptide

✅ Correct Answer: 2

Which enzyme is used in alcoholic fermentation of yeast?

1. Maltase
2. Invertase
3. Sucrase
4. Zymase

✅ Correct Answer: 4

Assimilation means

1. utilising the water taken by body
2. accumulating the food for digestion
3. utilisation of absorbed substances
4. collecting wastes left after the absorption of required nutrients

✅ Correct Answer: 3

The pH scale is used to measure

1. Electric charge on ion
2. Speed with which ions form
3. Size of ions
4. Concentration of hydrogen ions in a solution

✅ Correct Answer: 4

Which of the following part of human intestine hosts microorganisms?

1. Colon
2. Caecum
3. Anus
4. Rectum

✅ Correct Answer: 2

Duct leading from parotid gland and opening into vestibule is

1. Wolffian duct
2. Stensons duct
3. Haversian duct
4. Infra-orbit duct

✅ Correct Answer: 2

Which organ is most affected by jaundice?

1. Pancreas
2. Liver
3. Stomach
4. Intestine

✅ Correct Answer: 2

Globet cells of intestinal mucosal epithelium secrete

1. mucus
2. cholesterol
3. peptones
4. bilirubin

✅ Correct Answer: 1

Emulsification of fat takes place through

1. Liver enzymes
2. Bile pigments
3. Bile salts
4. Enzymes of small intestine

✅ Correct Answer: 3

Epithelial cells of the intestine involved in food absorption have on their surface

1. phagocytic vesicles
2. pinocytic vesicles
3. microvilli
4. zymogen granules

✅ Correct Answer: 3

Carrier ions like Na+ facilitate the absorption of substances like

1. Fructose and some amino acids
2. Amino acids and glucose
3. Glucose and fatty acids
4. Fatty acids and glycerol

✅ Correct Answer: 1

The glucose is converted into glycogen in liver and stored in

1. Liver and spleen
2. Liver and muscle
3. Liver
4. Spleen and muscles

✅ Correct Answer: 3

Small projections of upper surface of tongue are called

1. fimbriae
2. pilli
3. papillae
4. cilia

✅ Correct Answer: 3

Sweetest sugar is

1. Fructose
2. Sucrose
3. Glucose
4. Lactose

✅ Correct Answer: 1

The function of pneumotaxic centre is

1. regulate inspiration
2. regulate rhythm
3. increase heart rate
4. All of the above

✅ Correct Answer: 1

______ lies in front of esophagus.

1. Trachea
2. Glottis
3. Larynx
4. Epiglottis

✅ Correct Answer: 1

In brain, respiratory control centre lies in

1. pons
2. medulla oblongata
3. hypothalamus
4. cerebrum

✅ Correct Answer: 2

Deoxygenated blood from heart comes to lungs via

1. pulmonary vein
2. systemic vein
3. pulmonary artery
4. systemic artery

✅ Correct Answer: 3

Label the parts of the human respiratory system.

1. A- Oesophagus, B- Bronchioles, C- Lungs
2. A- Trachea, B- Bronchioles, C- Lungs
3. A- Trachea, B- Bronchus, C- Lungs
4. A- Oesophagus, B- Bronchioles, C- Pleura

✅ Correct Answer: 3

Pleura is a layer covering

1. heart
2. kidneys
3. lungs
4. brain

✅ Correct Answer: 3

Rheumatic fever can cause damage

1. Alveoli of the Lungs
2. heart valves
3. heart muscles
4. pleural membranes function

✅ Correct Answer: 2

What protects the moist membranes of the respiratory tract?

1. Mucus and cilia
2. A c shaped cartilage rings
3. A pebbly epidermal surface
4. An acidic glands

✅ Correct Answer: 1

RBCs, plasma and biocarbonate are the medium for transport of carbondioxide. Maximum amount of carbon dioxide is carried by

1. RBCs
2. Plasma
3. Bicarbonates
4. All RBCs and bicarbonate carried 70 per cent of carbondixide.

✅ Correct Answer: 3

The maximum volume of air that can be released from the lungs by forceful expiration after deepest inspiration is called the ______.

1. Total lung capacity
2. Vital capacity
3. Tidal volume
4. Ventilation rate

✅ Correct Answer: 2

Which one of the followings is correct regarding larynx?

1. It prevents foreign objects from entering the trachea
2. It houses the vocal cords
3. It is an organ made of cartilage and connects the pharynx to the trachea
4. All of these are correct

✅ Correct Answer: 4

Which of the following statements is true about Trachea in a respiratory system?

1. It functions as passages of air to each alveolus
2. It functions for sound production
3. It Acts as passage of air to bronchi
4. It Lowers the surface tension

✅ Correct Answer: 3

Trachea divides into bronchi at

1. 4th thoracic vertebra
2. 5th thoracic vertebra
3. 6th thoracic vertebra
4. 7th thoracic vertebra

✅ Correct Answer: 2

Aerobic respiratory pathway is also termed as ______ pathway.

1. Anabolic
2. Catabolic
3. Creatine phosphate
4. Amphibolic

✅ Correct Answer: 4

The oxygen dissociation curve is shifted to the right by an increase in ______.

1. H+ concentration
2. PCO2
3. temperature
4. All of these

✅ Correct Answer: 4

The maximum volume of air contained in the lung by a full forced inhalation is called

1. Vital capacity
2. Tidal volume
3. Total lung capacity
4. Inspiratory capacity

✅ Correct Answer: 3

Which organ lies in thoracic cavity?

1. Heart
2. Lungs
3. Pancreas
4. Both 1and 2

✅ Correct Answer: 4

In developing embryo RBCs are formed in

1. Lymph node
2. Bone marrow
3. Liver
4. Spleen

✅ Correct Answer: 3

In humans, blood passes from the post caval to the diastolic right atrium of heart due to:

1. Pressure difference between the post caval and atrium
2. Pushing open of the venous valves
3. Suction pull
4. Stimulation of the sino auricular node

✅ Correct Answer: 1

When body tissues are injured resulting in the loss of blood, the process of blood clot begins and the blood platelets release

1. Fibrinogen
2. Thrombin
3. Prothrombin
4. Thromboplastin

✅ Correct Answer: 4

An adult human has systolic and diastolic pressures as:

1. 80 mm Hg and 120 mm Hg
2. 120 mm Hg and 80 mm Hg
3. 50 mm Hg and 80 mm Hg
4. 80 mm Hg and 80 mm Hg

✅ Correct Answer: 2

Duration of cardiac cycle is

1. 0.7 sec
2. 0.9 sec
3. 0.8 sec
4. 0.11 sec

✅ Correct Answer: 3

In the above picture Q represents

1. exitation of the atria
2. depolarisation of ventricles
3. begining of systole
4. repolarisation

✅ Correct Answer: 3

Oxygenated blood occurs in

1. Pulmonary artery
2. Right atrium
3. Right ventricle
4. Pulmonary vein

✅ Correct Answer: 4

The cells lining the blood vessels belong to the category of

1. Columnar epithelium
2. Connective tissue
3. Smooth muscle tissue
4. Squamous epithelium

✅ Correct Answer: 4

Heart failure occurs due to

1. heart stops beating
2. damage of heart muscles
3. congestion of lungs
4. All of the above

✅ Correct Answer: 3

Artificial pace maker is transplanted in

1. Inter auricular septum
2. Below the collar bone
3. Inter ventricular septum
4. Right auricle

✅ Correct Answer: 2

Which of the following statement/statements can be related to erythroblastosis foetalis?

1. Severe anemia and jaundice to the baby.
2. Can be avoided by giving anti-Rh antibodies to mother immediately after delivery of the first child
3. Rh-antibodies from the Rh -ve mother destroys foetal RBCs
4. All of the above

✅ Correct Answer: 4

Among the following stem cells, which are found in the umbilical cord?

1. Cord blood stem cells
2. Adult stem cells
3. Embryonic stem cells
4. All of the above

✅ Correct Answer: 1

If vagus nerve is cut the heart beat

1. increases
2. decreases
3. will not be affected
4. will stop immediately

✅ Correct Answer: 1

If due to some injury the chordae tendinae of the tricuspid valve of the human heart is partially non-functional, what will be the immediate effect?

1. The flow of blood into the pulmonary artery will be reduced
2. The flow of blood into the aorta will be slowed down
3. The pacemaker will stop working
4. The blood will tend to flow back into the left atrium

✅ Correct Answer: 1

Heparin is

1. Anti-allergic
2. Blood diluter
3. Anticoagulant
4. Antiseptic

✅ Correct Answer: 3

Cardiac arrest is the state when

1. heart stops beating
2. inadequate blood supply to the heart
3. heart not pumping enough to meet the body needs
4. blood pressure increases

✅ Correct Answer: 1

What is the normal blood pressure of human beings?

1. 110/70
2. 120/70
3. 120/80
4. 110/80

✅ Correct Answer: 3

Arteries are best defined as the vessels which

1. Carry blood from one visceral organ to another visceral organ
2. Supply oxygenated blood to the different organs
3. Carry blood away from the heart to different organs
4. Break up into capillaries which reunite to form a vein

✅ Correct Answer: 3

Christmas disease is also known as

1. Haemophilia B
2. AIDS
3. Haemophilia A
4. Haemolytic jaundice

✅ Correct Answer: 1

Presence of RBCs in urine is

1. Uremia
2. ketonuria
3. Glucosuria
4. hematuria

✅ Correct Answer: 4

Ornithine cycle leads to the formation of

1. NH3
2. ((NH2)2)CO)
3. C5H4N4O3
4. C5H4N4

✅ Correct Answer: 2

The yellow pigment derived from heme breakdown and excreted by kidneys is

1. Uric acid
2. Urochrome
3. Cholesterol
4. Melanin

✅ Correct Answer: 2

What happens when glomerular filteration rate falls?

1. Activation of podocytes
2. Release of renin
3. Repression of juxta glomerular cells
4. None of the above

✅ Correct Answer: 2

Which of the following can be cured by hemodialysis?

1. Renal calculi
2. Glomerulonephritis
3. Uremia
4. All of these can be cured by hemodialysis

✅ Correct Answer: 3

Kidneys are located in

1. thoracic cavity
2. abdominal cavity
3. body cavity
4. pelvic cavity

✅ Correct Answer: 2

The muscular tubes which take the urine from the kidneys to the bladder are

1. Urinary bladders
2. Ureters
3. Urethras
4. Nephrons

✅ Correct Answer: 2

Most water and salts are reabsorbed in

1. DCT
2. Bowman s capsule
3. PCT
4. DCT and PCT

✅ Correct Answer: 3

Reabsorption of filterate occurs in

1. renal tubules
2. glomerular apparatus
3. medullary pyramid
4. juxta cells

✅ Correct Answer: 1

JG cells release

1. angiotensin II
2. aldosterone
3. renin
4. ANF

✅ Correct Answer: 3

pH of human urine is

1. 7.0
2. 6.5
3. 6.0
4. 7.5

✅ Correct Answer: 2

Average blood filtered by kidneys per minute is

1. 1000 – 1500 mL
2. 500 – 600 mL
3. 200 – 300 mL
4. 1100 – 1200 mL

✅ Correct Answer: 4

Which one of the following statements in regard to the excretion by the human kidneys is correct?

1. Ascending limb of Loop of Henle is impermeable to electrolytes
2. Descending limb of Loop of Henle is impermeable to water
3. Distal convoluted tubule is incapable of reabsorbing HCO3
4. Nearly 99 percent of the glomerular filtrate is reabsorbed by the renal tubules

✅ Correct Answer: 4

In the kidneys, osmotic pressure controls ______

1. Glucose absorption
2. Sodium absorption
3. Water absorption
4. None of these

✅ Correct Answer: 3

Presence of __________ in urine indicates diabetes mellitus.

1. Glucose
2. Cholesterol
3. Ketone bodies
4. Both 1 and 3

✅ Correct Answer: 4

If a man takes large amount of protein, he is likely to excrete more amount of

1. Glucose
2. Urea and uric acid
3. Water
4. Salts

✅ Correct Answer: 2

Nerves, blood vessels and ureter enters into the kidney through

1. calyces
2. hilum
3. capsule
4. cortex

✅ Correct Answer: 2

The principal nitrogenous excretory compound in humans is synthesised

1. In the liver but eliminated mostly through kidneys
2. In kidneys but eliminated mostly through liver
3. In kidneys as well as eliminated by kidneys
4. In liver and also eliminated by the same through bile

✅ Correct Answer: 1

The renal medulla consists of cone-shaped tissue masses called _______.

1. Renal pyramid
2. Adipose capsule
3. Renal cortex
4. Renal pelvis

✅ Correct Answer: 1