Difficult GK Questions with Answers Latest 179+ MCQs 2025

Questions ▼

Difficult GK Questions with Answers. We covered all the World’s hardest GK questions in English with answers for Class 10 in this post for free so that you can prepare for any competitive exam that covers hard GK questions.

Install our MCQTUBE Android app from the Google Play Store and prepare for any competitive government exams for free.

We also covered more than 50 hardest gk questions with answers and toughest gk questions with answers on our website in multiple posts as mentioned below. Please also do check them and improve your knowledge.

If you are worrying about what is the hardest GK questions in the world then your search ends here because we covered all the world’s hardest GK questions in this post and also on our website for free.

Join Telegram Group and Get FREE Alerts! Join Now

Join WhatsApp Group For FREE Alerts! Join Now

Related Posts:

Hard GK Questions with Answers for Students

Quick Quiz

What is the new name of ‘Leo Port Ville’?

1. Botswana

2. Kinshasha

3. Tasmania

4. Jibowti

Option 2 – Kinshasha

Which country’s ancient name is ‘Pleasant Island’?

1. Lesotho

2. Togo

3. Burkinafaso

4. Nauru

Option 4 – Nauru

What is the New name of Pondichery recently changed?

1. Puduchheri

2. Panjim

3. Pudutharini

4. Broach

Option 1 – Puduchheri

‘Sumatra’ is one of the islands of Indonesia. What is its new name? ( hardest GK question )

1. Alua

2. Andalas

3. Vanoutu

4. Luta

Option 2 – Andalas

What is the present name of Abyssinia?

1. Ethiopia

2. Thailand

3. Namibia

4. Malawi

Option 1 – Ethiopia

Which of the following cities’s old and new names are wrongly matched?

1. Ellis Island – Tuvalu

2. Stalingrad – Saint Petersberg

3. Kutch Sindhu Gulf – Khambhat Sindhu Gulf

4. Aurangabad – Shambhaji Nagar

Option 2 – Stalingrad – Saint Petersberg

What is the ancient name of ‘Yangoon’, the Capital of Myanmar?

1. Kaladan

2. Rangoon

3. Golden Pagoda

4. Malaya

Option 2 – Rangoon

Which of the following cities’ present and old names are wrongly matched?

1. Tiruvananthapuram – Trivendrum

2. Surat – Baroda

3. Panaji – Panjim

4. Thuthukudi – Tutikorin

Option 2 – Surat – Baroda

What is the ancient name of ‘Istanbul’, the capital city of Turkey?

1. Constantinople

2. Kampuchea

3. Canvaral

4. Kịch

Option 1 – Constantinople

What is the ancient name of ‘Beijing’?

1. Formosa

2. Saigon

3. Peking

4. Lagos

Option 3 – Peking

Which state’s ancient name is NEFA (North East Frontier Agency)?

1. Nagaland

2. Manipur

3. Arunachal Pradesh

4. Asom

Option 3 – Arunachal Pradesh

Which country’s ancient name is Mesopotamia?

1. Iran

2. Turkey

3. Egypt

4. Iraq

Option 4 – Iraq

Which of the following Island’s names has been recently changed to Kalaallit Nunaat?

1. Micronacia

2. Greenland

3. Malanacia

4. Polynacia

Option 2 – Greenland

Which state of India recently declared to change its name to Asom?

1. Tripura

2. Mizoram

3. Assam

4. Meghalaya

Option 3 – Assam

How did South Africa change its Capital’s name ‘Pretoria’ as a step of removing the remnants of Apartheid?

1. Lesotho

2. Republic of Lesotho

3. Tshwane

4. Dodoma

Option 3 – Tshwane

What is the ancient name of “Tasmania’?

1. Togoland

2. British Guiana

3. Demons land

4. Loncongs

Option 3 – Demons land

The new name of ‘Lenin Grad’ is ‘Saint Petersburg’. Then what is the ancient name of ‘Volga Grad’?

1. Upper Volta

2. Stalin Grad

3. Solice Berry

4. Neva Grad

Option 2 – Stalin Grad

What is the new name of ‘Calicut’?

1. Kochi

2. Kollam

3. Kojikod

4. Quailon

Option 3 – Kojikod

What is ‘Belij’ once called?

1. British Honduras

2. Nicaragua

3. Aksai Chin

4. Malivinas

Option 1 – British Honduras

Which of the following was once called as ‘Pearl of the Antles’?

1. Mumbai

2. Cuba

3. Manila

4. Shanghai

Option 2 – Cuba

Which Country’s old name is “Ellice Island”?

1. Nauru

2. Kiribathi

3. Basutland

4. Thuvalu

Option 4 – Thuvalu

What is the new name of ‘Persia’?

1. Iran

2. Iraq

3. Egypt

4. Cairo

Option 1 – Iran

What is the old name of “Thailand’?

1. Siam

2. Farmosa

3. Ellice Islands

4. Dahomi

Option 1 – Siam

What is the ancient name of ‘Oslo’, the capital city of Norway?

1. Lankongs

2. Batastre

3. Christiana

4. French West Africa

Option 3 – Christiana

The largest cell in the human body is-

(a) Muscle cell

(b) skin cell

(d) liver cell

Option a – Muscle cell

What is the normal blood pressure of humans?

(a) 120/80 mmHg

(b) 90/140 mmHg

(d) 85/150mmHg

Option a – 120/80 mmHg

Diabetes occurs because-

(a) The amount of insulin in the body worsens

(b) Vitamin ‘A’ is deficient in the body

(d) Changes in blood cells in the body

Option a – The amount of insulin in the body worsens

The cover of Capsule is made up of-

(a) Protein

(b) Egg peel

(d) Starch

Option d – Starch

Provides the most energy from the following-

(a) Carbohydrate

(b) Protein

(d) Mineral salts

Option a – Carbohydrate

Carbohydrate reabsorption in the human body is-

(a) sugar

(b) starch

(d) glycogen

Option a – sugar

Which of the following would give the athlete more energy quickly?

(a) fat

(b) vitamin

(d) Carbohydrate

Option d – Carbohydrate

Who makes tissues in the body-

(a) protein

(b) fat

(d) Vitamin

Option a – protein

Enzyme is basically what-

(a) Carbohydrate

(b) Protein

(d) amino acids

Option b – protein

Soybean contains a percentage of protein.

(a) 42%

(b) 50%

(d) 80%

Option a – 42%

In which of the following is the highest source of protein found?

(a) urad

(b) gram

(d) Soya bean

Option d – Soya bean

What is protein made of?

(a) amino acids

(b) alcohol

(d) Ammonia

Option a – amino acids

Camel remains in the desert for a few days without water. He can do this-

(a) Using the water stored in his muscle

(b) Using the lubricant deposited in your hump

(d) By reducing the use of water

Option b – Using the lubricant deposited in your hump

Iodine deficiency disease, which gland increases in Guitre-

(a) thyroid

(b) pituitary

(d) parotid

Option a – thyroid

The largest book in man is-

(a) Pancreas

(b) Liver

(d) renal

Option b – Liver

The female reproductive hormone is

(a) Estrogen

(b) Progesterone

(d) All of the above

Option d – All of the above

The male sex hormone is-

(a) Adrenaline

(b) Progesterone

(d) Estrogen

Option c – Testosterone

Which hormone is called ‘fight-fly hormone’-

(a) Insulin

(b) Adenylene

(d) Oxytocin

Option b – Adenylene

Who controls blood pressure-

(a) adrenal

(b) unbroken

(d) yellow body

Option a – adrenal

Insulin is a type of-

(a) salt

(b) hormone

(d) vitamin

Option b – hormone

Who discovered insulin?

(a) Muller

(b) FT Benting

(d) Robert Brown

Option b – FT Benting

Who is the father of modern antiseptic surgery-

(a) Joseph Lister

(b) Edward Jenner

(d) William Harvey

Option a – Joseph Lister

Which part of the eye is used in eye donation-

(a) retina

(b) cornea

(d) whole eye

Option b – cornea

Who is the largest organ of the human body-

(a) brain

(b) heart

(d) liver

Option c – leather

Which part of the human body cannot be transplanted-

(a) kidney

(b) heart

(d) brain

Option d – brain

The yellow color of human urine is caused by

(a) Euro chrome

(b) Blood

(d) bile

Option a – Euro chrome

Nephron related to-

(a) liver

(b) heart

(d) stomach

Option c – kidney

Where does the action of fertilization take place-

(a) in uterus

(b) In the oviduct

(d) Vaginal tract

Option b – In the oviduct

In which fluid does the human fetus float in the uterus?

(a) Korean fluid

(b) amniotic fluid

(d) None of these

Option b – amniotic fluid

Gestation in man is-

(a) 6 months

(b) 7 months

(d) 9 months

Option d – 9 months

The name of the first test tube baby was-

(a) Faith

(b) Indira

(d) Lewis

Option d – Lewis

Which text of the human body is called the ‘master book’-

(a) Pancreas

(b) Avatu

(d) spleen

Option c – Piyush

Shortest text of human body-

(a) liver

(b) thyroid

(d) Salivary gland

Option c – Pituitary

The most important gland of the human body is-

(a) thyroid

(b) pituitary

(d) liver

Option b – Pituitary

Where is the pituitary gland located?

(a) brain

(b) Pancreas

(d) Kidney

Option a – brain

Which hormone is used to wean milk in cow and buffalo udder Injected is?

(a) Sametotopin

(b) oxytocin

(d) Insulin

Option b – oxytocin

Blood groups are explorers –

(a) Landsteiner

(b) Leuven

(d) Leuvenhawk

Option a – Landsteiner

Antibodies are not found in which blood group-

(a) A

(b) B

(d) O

Option c – AB

In which blood group both antibodies were found-

(a) A

(b) B

(d) 0

Option d – 0

In which blood class no antigen is found?

(a) A

(b) B

(d) 0

Option d – 0

Which blood group is ubiquitous?

(a) A

(b) B

(d) AB

Option d – AB

The following blood group is the universal donor-

(a) B

(b) 0

(d) AB

Option b – 0

Cerebrum related to-

(a) liver

(b) heart

(d) pulse

Option c – brain

The largest part of the human brain is-

(a) Brains

(b) cerebellar

(d) Middle brain

Option c – cerebrum

The largest cell in the human body is-

(a) White blood cell

(b) red blood cell

(d) None of these

Option c – nerve cell

How many times a person breathes in a minute-

(a) 16-18

(b) 20-25

(d) 70-72

Option d – 70-72

What is the approximate amount of Co in the air of our exhaled breath?

(a) 4%

(b) 8%

(d) 16%

Option a – 4%

Where is urea produced in the human body-

(a) heart

(b) kidney

(d) spleen

Option c – liver

Blood impurities go into which organ and filter-

(a) lungs

(b) kidneys

(d) heart

Option b – kidneys

Blood in human filtering is-

(a) in the lungs

(b) Bowman Samput

(d) ureter

Option b – Bowman Samput

The blood pressure (systolic and dystolic) of a healthy person is-

(a) 120 mm and 80 mm

(b) 201 mm and 110 mm

(d) 85 mm and 55 mm

Option a – 120 mm and 80 mm

What percentage of water is found in the human body?

(a) 70%

(b) 67%

(d) 40%

Option b – 67%

Blood pressure of a human while running-

(a) increases

(b) decreases

(d) remains the same

Option a – increases

The function of the heart in the human body is-

(a) Like a pumping station

(b) Energy to the body

(d) None of these

Option a – Like a pumping station

What is the total amount of blood in the body of a healthy human?

(a) 10% of body weight

(b) 25% of body weight

(d) 5% of body weight

Option c – 7% of body weight

What changes in blood pressure at bedtime?

(a) increases

(b) decreases

(d) remains the same

Option c – first decreases then increases

In a healthy person, the heartbeat per minute is-

(a) 58 times

(b) 67 times

(d) 90 times

Option c – 72 times

Which enzyme is found in saliva?

(a) renin

(b) tyline

(d) resins

Option b – tyline

Whose saliva is digested from the mouth?

(a) protein

(b) starch

(d) vitamin

Option b – starch

Which of the following acids is present in the human stomach?

(a) Sulfuric acid

(b) hydrochloric acid

(d) picric acid

Option b – hydrochloric acid

Where does protein digestion begin?

(a) small intestine

(b) oral cavity

(d) Abdomen

Option d – Abdomen

Bile is produced by which of the following?

(a) liver

(b) stomach

(d) duodenum

Option a – liver

Bile accumulates-

(a) Fat changes in fatty acids and .glycerol

(b) conversion of fatty acids and glycerol into fat

(d) All of the above

Option c – emulsification of fat

With whom is Pace Maker related?

(a) kidney

(b) brain

(d) heart

Option d – heart

The function of the pacemaker is-

(a) Regulation of urine

(b) Regulation of digestion

(d) To start breathing

Option c – Start heartbeat

The digesting enzyme of milk protein is-

(a) pepsin

(b) trypsin

(d) Eropsin

Option c – Renin

The smallest bone in the human body is-

(a) nail

(b) jaw

(d) nose

Option c – stepis

Which gland controls the temperature in humans?

(a) adrenal

(b) hypothalamus gland

(d) unbroken gland

Option b – hypothalamus gland

In which bone is the tibia found?

(a) Skull

(b) leg

(d) mouth

Option d – mouth

Which part of the human body has the longest bone?

(a) spinal cord

(b) thigh

(d) arm

Option b – thigh

Elements found in teeth and bones are

(a) Potassium and calcium

(b) calcium and magnesium

(d) Phosphorus and Sulfur

Option c – calcium and phosphorus

How many teeth develop twice in a man’s lifetime?

(a) 4

(b) 12

(d) 28

Option c – 20

In which part of the digestion in the human body is the majority?

(a) pancreas

(b) large intestine

(d) stomach

Option c – small intestine

Where is the penguin bird found?

(a) Africa

(b) South America

(d) North America

Option c – Antarctica

The largest bird unable to fly at the fastest speed Might, that is –

(a) Penguin

(b) Kiwi

(d) Emu

Option c – Ostrich

The bird flying in vomit is-

(a) Penguin

(b) Humming Bird

(d) Duck

Option b – Humming Bird

Dolphin is an example of which class?

(a) Amphibia

(b) Bird

(d) Fish

Option c – Mammalia

The whale is a mammal because it contains-

(a) Lungs, vesicular heart, and vertebrae are punishment.

(b) Milk glands, chorion and hair

(d) Venous heart and lungs

Option b – Milk glands, chorion and hair

Largest. The living mammal is-

(a) Elephant

(b) Camel

(d) Man

Option c – Blue whale

How many cells are there in the heart of the breast?

(a) 2

(b) 3

(d) 5

Option c – 4

The aviation bird found in New Zealand is-

(a) Ostrich

(b) Alvetras

(d) Penguin

Option c – Kiwi

Whose number is the highest in the world?

(a) fish

(b) beetle

(d) Bird

Option a – fish

The most venomous fish is-

(a) Stone fish

(b) electric fish

(d) Sea horse

Option a – Stone fish

The largest fish found in India are-

(a) whale shark

(b) stone fish

(d) Hilsa

Option a – whale shark

How many chambers are there in a frog’s heart?

(a) 2

(b) 3

(d) 5

Option b – 3

The cold-blooded creature is-

(a) fish

(b) frog

(d) All of the above

Option d – All of the above

The most venomous snake is-

(a) Moosh snake

(b) Python

(d) axial snake

Option c – Hydrofish

The only snake to make a nest is-

(a) chain wiper

(b) King Cobra

(d) saw-scaled wiper da

Option b – King Cobra

Flying Gecko-

(a) Draco

(b) Gacona

(d) Officosaurus

Option a – Draco

The bones of birds are-

(a) solid

(b) strong and solid

(d) None of these

Option c – Vatil

The largest living bird is-

(a) Kiwi

(b) Penguin

(d) eagle

Option c – Ostrich

The smallest bird is-

(a) kiwi

(b) hummingbird

(d) Penguin

Option b – hummingbird

Where is a Kiwi bird found?

(a) New Zealand

(b) Australia

(d) Canada

Option a – New Zealand

How many pairs of legs are there in insects?

(a) 1

(b) 2

(d) 4

Option c – 3

Lacquer is produced-

(a) From the bark of trees

(b) from the feces of insects

(d) From the ovaries of insects

Option b – By the secretion of the body of insects

Silk is obtained by

(a) From silkworm eggs

(b) silkworm larvae

(d) None of these

Option c – silkworm pupa

The larva of the domestic fly is called-

(a) pupa

(b) maggot

(d) Bhekashishu

Option c – Mengot

Spreads sleeplessness-

(a) CC fly

(b) sand fly

(d) No

Option a – CC fly

Kala Azar is a mosquito spreading disease in humans-

(a) flea

(b) lice

(d) Sandfly

Option d – Sandfly

Which carrier of malaria disease-

(a) Male culex

(b) Male anopheles

(d) Female anopheles

Option b – Male anopheles

Starfish is a creature of which of the following associations?

(a) Mollusca

(b) Fish

(d) Echinodermata

Option d – Echinodermata

Aristotle’s lantern is-

(a) A clean aquatic echinoderm animal

(b) Chewing mechanism in the dietary system of sea urchin

(d) Lantern-like composition of Greek country which is saturated in sea lily

Option b – Chewing mechanism in the dietary system of sea urchin

Respiratory activity in fish is done by [ Difficult GK Questions with Answers ]

(a) Gill

(b) Lung

(d) Nasal hole

Option c – Gills

Which one of the following creatures is actually a fish?

(a) StarFish

(b) Jellyfish

(d) Seahorse

Option d – Seahorse

The sea horse is an example of which class?

(a) Fish

(b) Mammal

(d) Mollusca

Option a – Fish

The total number of chromosomes in a human being is-

(a) 46

(b) 48

(d) Indeterminate

Option a – 46

The chromosome responsible for the sex determination of children is-

(a) father’s

(b) Mother

(d) None of these

Option a – father’s

Which of the following is a cloned merino lamb?

(a) Semolina

(b) Mystic

(d) Dolly

Option d – Dolly

Who first explained bio-development?

(a) Newton

(b) Einstein

(d) Lamarck

Option d – Lamarck

The basic principle of Lamarckism is-

(a) Variations

(b) Heredity of acquired traits

(d) Sudden development of new organs

Option b – Heredity of acquired traits

The theory of natural selection of organisms has been proposed-

(a) Lamarck

(b) Darwin

(d) Pasteur

Option b – Darwin

A book titled ‘The Origin of Species’ has been written-

(a) by Lamarck

(b) by Darwin

(d) by Dunkel

Option b – by Darwin

The theory of mutation was given by

(a) Huxley

(b) Darwin

(d) D. Bridge

Option d – D. Bridge

Life was born [ Difficult GK Questions with Answers ]

(a) On the mountains

(b) on land

(d) in the air

Option c – in water

Protozoa responsible for dysentery or amoebiasis is-

(a) Amoeba

(b) Entamoeba

(d) Trypanosoma

Option b – Entamoeba

Protozoa causing malaria fever is-

(a) Paramoecium

(b) Leishmania

(d) Entamoeba

Option c – Plasmodium

The protozoa that produce Kala-Azar are-

(a) Entamoeba

(b) Trypanosoma

(d) Leishmania

Option d – Leishmania

Sleeping Sickness produces-

(a) Trichomonas

(b) Trypanosoma

(d) Plasmodium

Option b – Trypanosoma

In Japan, the gift is presented as

(a) Hyalonema

(b) Tethya

(d) Pharyonema

Option c – Euplactella

Known as ‘the flower of Venus’

(a) Leucosolenia

(b) Saikoneala

(d) Euplactella

Option d – Euplactella

What is coral? [ Difficult GK Questions with Answers ]

(a) A forest wood

(b) a sea creature

(d) None of these

Option b – a sea creature

A disease called filariasis occurs-

(a) by Ascaris

(b) by Wuchereria Bancrofti

(d) by Taenia solium

Option b – by Wuchereria Bancrofti

Which blood pigment is present in earthworms?

(a) Hemocyanin

(b) Hematin

(d) Cyanin

Option a – Hemocyanin

How many eyes do earthworms have?

(a) one

(b) two

(d) no eye

Option d – no eye

The genetic material found in a cell is [ Difficult GK Questions with Answers ]

(a) DNA

(b) RNA

(d) Carbohydrate

Option a – DNA

The first synthesis of DNA was done in the laboratory-

(a) Miller

(b) Khurana

(d) Calvin

Option b – Khurana

Which scientist described the structure of DNA molecules?

(a) G.J. Mandal

(b) Hargovind Khurana

(d) JC Bose

Option d – JC Bose

The Center for DNA Finger Print and Diagnostic (CDFD) is located at

(a) in Hyderabad

(b) in Bangalore

(d) in Chennai

Option a – in Hyderabad

The number of diploid chromosomes in humans is-

(a) 23

(b) 24

(d) 48

Option a – 23

By whom was the first replacement of the heart done?

(a) Dr. William Harvey

(b) Sir F. G. Hawkins

(d) Dr. Christian Bernard

Option d – Dr. Christian Bernard

The ‘theory of development’ was propounded by

(a) Pasteur

(b) Aristotle

(d) Darwin

Option d – Darwin

Who is the father of modern antiseptic surgery?

(a) Lister

(b) Jenner

(d) Harvey

Option a – Lister

Who discovered the rabies vaccine? [ Difficult GK Questions with Answers ]

(a) Jenner

(b) Pasteur

(d) Lister

Option b – Pasteur

Who created the principle of ‘natural selection’?

(a) Newton

(b) Mandel

(d) Archimedes

Option c – Darwin

Who first used the term histology?

(a) Mayer

(b) Schleiden

(d) Mammon

Option a – Mayer

Which one of the following is responsible for keeping the body warm?

(a) sweat glands

(b) connective tissue

(d) Rome

Option c – sebaceous tissue

Human’s skin is the thickest –

(a) palm

(b) on the floor

(d) on the head

Option b – on the floor

The longest cell in the human body is-

(a) Hand cell

(b) foot cell

(d) None of these

Option c – nerve cell

What tissue would a camel hump be made of?

(a) skeletal tissue

(b) Muscular tissue

(d) sebaceous tissue

Option d – sebaceous tissue

Jean is [ Difficult GK Questions with Answers ]

(a) a part of the liver

(b) a part of RNA

(d) a part of DNA

Option d – a part of DNA

Who would have studied ornithology?

(a) bird

(b) mammal

(d) fish

Option a – bird

Mother called the study of extinct beings?

(a) Herpetology

(b) Ornithology

(d) Paleontology

Option d – Paleontology

Histology is related to

(a) tissue

(b) virus

(d) cell

Option a – tissue

The study of rules of inheritance is called-

(a) Taxonomy

(b) cytology

(d) Ecology

Option c – Genetics

The study of population is called-

(a) Paleontology

(b) Cartography

(d) Demography

Option d – Demography

The cradle of bees is called-

(a) Apiculture

(b) Sericulture

(d) PCculture

Option a – Apiculture

Sericulture is called-

(a) Apiculture

(b) Sericulture

(d) horticulture

Option b – Sericulture

The study of internal organs is-

(a) Aegeology

(b) Arthology

(d) Splenology

Option d – Splenology

Science related to tooth study [ Difficult GK Questions with Answers ]

(a) Odontology

(b) Ornithology

(d) Cosmology

Option a – Odontology

The originators of the law of heredity are-

(a) Darwin

(b) Wallace

(d) Lamarck

Option c – Mandel

Who was the founder of DNA synthesis?

(a) Ochoa

(b) Kornberg

(d) Weissman

Option b – Kornberg

Who discovered Bacteria?

(a) Louis Pasteur

(b) Leuvenhawk

(d) Torricelli

Option b – Leuvenhawk

Hargovind Khurana received the prestigious Nobel Prize in which field?

(a) Biochemistry

(b) Medical Sciences

(d) Economics

Option b – Medical Sciences

The largest ecosystem in the world is-

(a) Grasslands

(b) Large lakes

(d) Forest

Option c – Sagar

Soil erosion can be prevented-

(a) By overgrazing

(b) By eradicating vegetation

(d) By increasing the number of birds

Option c – Afforestation

Who receives solar energy? [ Difficult GK Questions with Answers ]

(a) Moon

(b) Sea

(d) Wind

Option c – Sun

Major air pollutants in cities like Mumbai and Kolkata are-

(a) CO and SO2

(b) Hydrocarbons

(d) Ozone

Option a – CO and SO2

Which gas contributes most to the ‘greenhouse effect’ on Earth?

(a) Frion

(b) Methane

(d) Chlorofluorocarbons

Option c – Carbon dioxide

In the Bhopal gas leakage accident, which gas leaked?

(a) Carbon monoxide

(b) Ethyl isocyanate

(d) SO2 and NO

Option c – Methyl isocyanate

Damage to the Taj Mahal is taking place due to

(a) Yamuna floods

(b) Decomposition of marble at high temperatures

(d) None of the above

Option c – Air pollutants released from Mathura oil refinery

Which of the following tests are done to measure water pollution?

(a) Biological Oxygen Demand

(b) Biochemical Oxygen Demand

(d) None of the above

Option c – Biomechanical Oxygen Demand

D.D.T. is a [ Difficult GK Questions with Answers ]

(a) Antibiotic

(b) Biodegradable pollutant

(d) None of the above

Option c – Non-biodegradable pollutant

Which of the following gases does not pollute the air?

(a) O2

(b) CO

(d) SO2

Option a – O2

The branch of science that studies human skin is called-

(a) Physiology

(b) Anatomy

(d) Dermatology

Option d – Dermatology

The study of bones is done under which branch of science?

(a) Orology

(b) Osteology

(d) Geology

Option b – Osteology

What is the study of insects called?

(a) Anthropology

(b) Entomology

(d) Ecology

Option b – Entomology

The study of butterflies is called?

(a) Ecology

(b) Neonatology

(d) Palynology

Option c – Lepidopterology

A study related to fish is called?

(a) Ichthyology

(b) Sacrology

(d) Cryptology

Option c – Ecology

Cell wall is [ Difficult GK Questions with Answers ]

(a) Permeable

(b) Semi-permeable

(d) Impermeable

Option a – Permeable

Mitochondria were absent in

(a) Yeast

(b) Fungi

(d) Green algae

Option c – Bacteria

Who first used the word Protoplasm?

(a) Darwin

(b) Purkinje

(d) Bacteria

Option b – Purkinje

Whose statement is the physical basis of life?

(a) Henry

(b) Lamarck

(d) Treviranus

Option c – Huxley

Who is credited for the first formulation of the term Ecology?

(a) Brown

(b) Aristotle

(d) Ritter

Option d – Ritter

The word ecosystem was first propounded by

(a) Weaver

(b) A.G. Tansley

(d) Reiter

Option b – A.G. Tansley

The food chain is formed [ Difficult GK Questions with Answers ]

(a) From producers, consumers, and decomposers

(b) From producers, primary consumers, secondary consumers, and decomposers

(d) From producers, herbivores, carnivores, and decomposers

Option a – From producers, consumers, and decomposers

Who is called the powerhouse of a cell?

(a) Golgi apparatus

(b) Nucleolus

(d) Ribosome

Option c – Mitochondria

Where does protein synthesis occur in the cell?

(a) Golgi apparatus

(b) Ribosomes

(d) Centrosome

Option b – Ribosomes

What is the active site of protein formation?

(a) Lysosome

(b) Ribosome

(d) Golgi apparatus

Option b – Ribosome

What provides a variety of attractive colors to flowers and seeds?

(a) Leukoplast

(b) Chromoplast

(d) Tonoplast

Option b – Chromoplast

What gives a green color to leaves?

(a) Chromoplast

(b) Chloroplast

(d) Tonoplast

Option b – Chromoplast

The suicide sac of a cell is called-

(a) Lysosome

(b) Ribosome

(d) Golgi body

Option a – Lysosome

What is Tikka disease related to?

(a) Mustard

(b) Paddy

(d) Groundnut

Option d – Groundnut

Goljikaya’s major work is [ Difficult GK Questions with Answers ]

(a) respiration

(b) initiating cell division

(d) externally

Option d – externally

The famous ‘Khaira disease’ in paddy is caused by

(a) Due to mildew

(b) Due to bacteria

(d) Due to zinc deficiency

Option d – Due to zinc deficiency

Red Rust disease in tea is caused by

(a) Bacteria

(b) Lichen

(d) Green algae

Option d – Green algae

Scientists working on Rust disease related to wheat are-

(a) H. C. Bold

(b) K. C. Mehta

(d) D. D. Pant

Option b – K. C. Mehta

The fungus responsible for red rot disease of sugarcane is-

(a) Sarcospora ponetta

(b) Phytophthora infestans

(d) Colletotrichum falcatum

Option d – Colletotrichum falcatum

The fungus responsible for the late blight disease in potato is-

(a) Sarcospora parinetta

(b) Phytophthora infestans

(d) Sclerospora graminicola

Option b – Phytophthora infestans

Ring disease is known as

(a) Diarrheal disease

(b) Mosaic disease

(d) Wart disease

Option a – Diarrheal disease

Business cork is obtained from [ Difficult GK Questions with Answers ]

(a) Xylem

(b) Phloem

(d) Vascular cambium

Option c – Cork cambium

The age of trees is determined by

(a) Its weight

(b) Its height

(d) By the length of its roots

Option c – Based on the number of annual rings in it

Leaves fall off branches due to

(a) By completing its lifetime

(b) Decline in atmospheric temperature

(d) Due to shortening of daily life

Option c – The formation of a separation layer outside the cork

Who among the following is called the ‘father of genetics’?

(a) Darwin

(b) Weismann

(d) D. Breeze

Option c – Mendel

In the laboratory, DNA was first synthesized by

(a) Miller

(b) Khurana

(d) Calvin

Option b – Khurana

Who first used the word ‘gene’? [ Difficult GK Questions with Answers ]

(a) Valdair

(b) Watson

(d) Johansen

Option d – Johansen

By whom was the science of heredity called ‘genetics’?

(a) Mendel

(b) Correns

(d) Watson

Option d – Watson

Which biologist first gave the name ‘cell’?

(a) Fleming

(b) Leeuwenhoek

(d) Brown

Option c – Robert Hooke

What is the branch of biology related to the study of cells?

(a) Cytology

(b) Histology

(d) Physiology

Option a – Cytology

Hard GK questions with answers are covered on our website, you will get them as links below the related posts at the start of this post.

Check out the latest MCQ content by visiting our mcqtube website homepage.