Olete.in – MCQs, Mock Tests & Government Job Prep | Biology MCQs Question and Answer -Biology Set 3

Name the metal present in chlorophyll ‘a’ and ‘b’?

1. Iron
2. Copper
3. Magnesium
4. Manganese

✅ Correct Answer: 3

Name the structural unit of photosynthesis?

1. Thylakoid
2. Grana
3. Stroma
4. Chlorophyll

✅ Correct Answer: 1

Which of the following statements are true regarding Photosystems?

1. Photosystems are arrangements of chlorophyll and other pigments packed into thylakoids.
2. Many Prokaryotes have only one photosystem.
3. Both A and B are correct.
4. Only A is correct.

✅ Correct Answer: 3

What is the first step in photosynthesis:

1. Generation of ATP
2. Formation of NADPH
3. Through light, excitement of an electron of chlorophyll pigment.
4. Formation of Glucose

✅ Correct Answer: 3

Due to which reaction PGA is changed into phosphoglyceraldehyde in photosynthesis process?

1. Oxidation
2. Oxidation
3. Electrolysis
4. Hydrolysis

✅ Correct Answer: 2

What will be the ratio of oxygen produced to that of consumed in daylight hours when the rate of respiration is less than that of photosynthesis?

1. 1/0/1900 1:01
2. 1/0/1900 10:01
3. 1/0/1900 5:01
4. None

✅ Correct Answer: 1

In Photosynthesis process, how many molecules of NADPH and ATP are required to reduce six molecules of carbon dioxide to glucose?

1. 3 ATP and 2 NADPH
2. 6 ATP and 6 NADPH
3. 12 ATP and 18 NADPH
4. 18 ATP and 12 NADPH

✅ Correct Answer: 4

Mention the internal factors that influence photosynthesis?

1. Size, position and structure of stomata
2. Maintenance of the turgidity of the leaf cells
3. Relative proportion and distribution of chloroplasts in the mesophyll
4. All of the above

✅ Correct Answer: 4

Name the external factors that affect photosynthesis process?

1. Light Intensity
2. Carbon dioxide concentration
3. Temperature
4. All of the above

✅ Correct Answer: 4

What do you understand by NADP?

1. It is an enzyme
2. It is a co-enzyme
3. A part of s-RNA
4. A part of t-RNA

✅ Correct Answer: 3

Photosynthesis is :

1. An Oxidation-Reduction reaction
2. Synthesis reaction
3. Organic reaction
4. Replacement reaction

✅ Correct Answer: 1

Which one of the following waves are used by the common TV remote control?

1. Radio waves
2. Lasers
3. Infrared waves
4. Ultrasonic waves

✅ Correct Answer: 3

Which gas is safe and an effective extinguisher for all confined fires?

1. Nitrogen dioxide
2. Carbon dioxide
3. Sulphur dioxide
4. Nitrous Oxide

✅ Correct Answer: 2

Which one of the following statements is incorrect about laser?

1. It is a technique for producing intense beams of light, ultraviolet or infrared radiation of different wavelength.
2. Even in diamond laser beam can drill a hole.
3. A variety of lasers have been made from solids like the ruby crystal and semi conducting materials, liquids and gases.
4. All waves in laser, travel in phase.

✅ Correct Answer: 1

Which one of the following elements the drum of a Photostat machine is made up of:

1. Aluminium
2. Selenium
3. Barium
4. Caesium

✅ Correct Answer: 2

If we say the child has an IQ of 100, what does this means?

1. The performance of the child is below average.
2. The performance of the child is above average.
3. The mental age of the child is equal to his actual age.
4. The performance of the child cannot be better.

✅ Correct Answer: 3

Which bacteria is responsible for the formation of curd?

1. Lactic acid bacteria
2. Lactobacillus Acidophillus
3. Lactobacillus aureus
4. Bacillus radicicola

✅ Correct Answer: 2

Which one of the following bacteria present in the soil produces a peculiar smell if it rains on perched soil?

1. Streptomycetes
2. Staphymycetes
3. Diplomycetes
4. Micrococcus

✅ Correct Answer: 1

In poorly ventilated buildings which one of the following inert gases can be accumulated?

1. Helium
2. Neon
3. Argon
4. Radon

✅ Correct Answer: 4

Honey is sweeter than cane sugar or corn syrup. Which one of the following carbon sugars is responsible for this?

1. .Dextrose
2. Levulose
3. Sucrose
4. Fructose

✅ Correct Answer: 2

Who had given the theory of evolution of species by natural selection?

1. Darwin
2. Mendel
3. Dalton
4. Morgan

✅ Correct Answer: 1

Who is known as the father of genetics?

1. Mendel
2. Darwin
3. Dalton
4. Marie Curie

✅ Correct Answer: 2

Which of the following are the sources which provide evidences for evolution?

1. Homologous organs
2. Analogous organs
3. Fossils
4. All the above

✅ Correct Answer: 4

Name a fossil bird which looks like a bird but has many other features found in reptiles?

1. Dodo
2. Archaeopteryx
3. Flamingos
4. Mouse Bird

✅ Correct Answer: 2

Name the organs which have different basic structure but have similar appearance and perform similar functions?

1. Analogous organs
2. Homologous organs
3. Both A and B
4. Neither A nor B

✅ Correct Answer: 1

Who suggested that life must have developed from the simple inorganic molecules like methane, hydrogen etc. which were present on the earth soon after it was formed?

1. Darwin
2. Marrie Curie
3. Haldane
4. None of the above

✅ Correct Answer: 3

Aves have evolved from:

1. Amphibians
2. Arthropods
3. Mammals
4. Reptiles

✅ Correct Answer: 4

The theory of origin of life on earth is proposed by:

1. Haldane
2. Stanley Miller
3. Harold C. Urey
4. Lamarck

✅ Correct Answer: 1

Which of the following are the postulates of Darwin’s theory of evolution?

1. Within any population, there is natural variation.
2. Even though all species produce a large number of offsprings, populations remain fairly constant naturally.
3. The struggle for survival within populations eliminates the unfit individuals.
4. All the above are correct

✅ Correct Answer: 4

The process by which new species develop from the existing species is called:

1. Homologous
2. Analogous
3. Speciation
4. Genetic variation

✅ Correct Answer: 3

In Human beings the process of digestion of food begins in:

1. Stomach
2. Food Pipe
3. Mouth
4. Small Intestine

✅ Correct Answer: 3

Which of the following organism have parasitic mode of nutrition?

1. Penicillium
2. Plasmodium
3. Paramecium
4. Parrot

✅ Correct Answer: 2

Name the first enzyme that mix with food in the digestive tract?

1. Pepsin
2. Trypsin
3. Amylase
4. None of the above

✅ Correct Answer: 3

Which of the following in biology is the energy currency of cells?

1. PDP
2. DTP
3. ATP
4. ADP

✅ Correct Answer: 3

In the stem of a plant respiration and breathing takes place through:

1. Lenticels
2. Stomata
3. Root hair
4. Air tubes

✅ Correct Answer: 1

Which animal has three-chambered heart?

1. Pigeon
2. Lizard
3. Fish
4. Lion

✅ Correct Answer: 2

Name the blood vessel which carries blood back to the heart?

1. Vein
2. Artery
3. Capillaries
4. Platelet

✅ Correct Answer: 1

Transportation of food in plants takes place through:

1. Xylem
2. Phloem
3. Companion cells
4. Tracheids

✅ Correct Answer: 2

After wound or cut in a body blood coagulates through:

1. WBC
2. RBC
3. Platelets
4. Plasma

✅ Correct Answer: 3

When blood is forced into the artery, wave like expansion takes place is called:

1. Heart beat
2. Pulse
3. Flow
4. Ticking

✅ Correct Answer: 2

In amoeba excretion takes place through the process of:

1. Diffusion
2. Infusion
3. Uricotelic
4. None of the above

✅ Correct Answer: 1

Name the excretory organ present in earthworm through which excretion takes place?

1. Moist Skin
2. Nephridia
3. Both A and B
4. Only B

✅ Correct Answer: 3

The major waste produced by human body are:

1. Carbon dioxide
2. Urea
3. Both A and B
4. Only B

✅ Correct Answer: 2

Which organ in the human body is responsible for removing carbon dioxide from the body?

1. Kidney
2. Lungs
3. Blood
4. Ureter

✅ Correct Answer: 2

Each kidney is made up of a large number of excretory units called:

1. Glomerulus
2. Bowman’s Capsule
3. Nephron
4. Blood capillaries

✅ Correct Answer: 3

In which of the following are the largest amounts of nitrogen excreted from a mammalian body?

1. Breath
2. Sweat
3. Urine
4. Faeces

✅ Correct Answer: 3

The best long term solution for kidney failure is:

1. Dialysis
2. Kidney transplant
3. Both A and B
4. Only B

✅ Correct Answer: 2

What types of nitrogenous wastes are excreted by living organisms?

1. Ammonia
2. Uric acid
3. Urea
4. All of the above

✅ Correct Answer: 4

Name the organs that make up the excretory system in humans?

1. Two Kidneys
2. Two Ureters
3. Bladder and Urethra
4. All of the above

✅ Correct Answer: 4

Which vessel carries blood to the kidneys?

1. Renal Arteries
2. Renal Vein
3. Both A and B
4. Only A

✅ Correct Answer: 4

An ancient book of 1000 B.C. deals with health, hygiene, longevity etc?

1. Sushruta Samhita
2. Atatharvaveda
3. Bhela Samhita
4. Charaka Samhita

✅ Correct Answer: 2

Name a concise and scientific exposition of Ayurveda in verse form. It is distinguished by its knowledge of chemical reactions and laboratory processes etc.

1. Vrdukunta
2. Vaghata
3. Kasyapa Samhita
4. None of the above

✅ Correct Answer: 2

Name an ancient book which describes difficult surgical operations like opening of a brain etc.

1. Celsus
2. Bhela Samhita
3. Chivaravastu
4. Agnivesa Samhita

✅ Correct Answer: 3

Which ancient book of 600 B.C. deals with paediatrics?

1. Kasyapa Samhita
2. Agnivesa Samhita
3. Bhela Samhita
4. None of the above

✅ Correct Answer: 1

A treatise on the rasa chikitsa system of ancient medicine, which considers mercury as the king of all medicines.

1. Vaghata
2. Tristia
3. Gandavadha
4. Vrdukunta

✅ Correct Answer: 4

A treatise on medicine and surgery from Alexandria and Rome?

1. Celsus
2. Hippocratic Oath
3. Georgics
4. Aeneid

✅ Correct Answer: 1

Which of the following ancient book is the codification of medicine scattered in the Vedas?

1. Bhela Samhita
2. Charaka Samhita
3. Sushruta Samhita
4. None of the above

✅ Correct Answer: 1

Who is considered as the father of western medicines?

1. Hesiod
2. Hippocrates
3. Both 1 and 2
4. Neither 1 nor 2

✅ Correct Answer: 2

Name the first book on medicine in China?

1. Huangdi Neiching
2. Celsus
3. Vaghata
4. None of the above

✅ Correct Answer: 1

A classical exposition of Indian medicine. It deals with almost all branches of medicine?

1. Madhavacharaya
2. Kasyapa Samhita
3. Charaka Samhita
4. Agnivesa Samhita

✅ Correct Answer: 3

Which of the following sentence is/ are correct about Dementia?

1. In Dementia mental ability declines and interfere the daily life.
2. A person suffering from this disease may forget his or her name.
3. Alzheimer's disease is a cause of Dementia.
4. All the above are correct

✅ Correct Answer: 4

Which of the following statement is/ are correct about Alzheimer’s disease?

1. Alzheimer disease is a degenerative disease of the brain that causes dementia and it has been found that it is closely linked with type 2 diabetes.
2. Alzheimer's disease is not a mental illness but it can cause symptoms related to mental health like depression, anxiety etc.
3. Alzheimer's disease is categorised into mild Alzheimer's disease, moderate Alzheimer's disease and severe Alzheimer's disease.
4. All the above are correct

✅ Correct Answer: 4

Which of the following is not the Symptom of Dementia?

1. Problem solving or language and the ability to focus and pay attention.
2. Memory loss
3. Difficulties with thinking
4. Dementia people are able to control their emotions.

✅ Correct Answer: 4

How Dementia is caused?

1. Dementia can be caused due to Blood infection.
2. Dementia can be caused by a stomach infection.
3. Dementia may be caused due to HIV infection.
4. Deficiency of calcium may lead to Dementia.

✅ Correct Answer: 3

Name the type of Dementia disease in which a neurodegenerative condition linked to abnormal structures in the brain?

1. Alzheimer's disease
2. Dementia with Lewy bodies
3. Parkinson's disease
4. Huntington's disease

✅ Correct Answer: 2

Which disease is characterized by specific types of uncontrolled movements but also includes dementia?

1. Parkinson's disease
2. Mixed dementia
3. Huntington's disease
4. None of the above

✅ Correct Answer: 3

Name a disease in which a person may show both Alzheimer's disease and vascular dementia at the same time?

1. Alzheimer's disease
2. Parkinson's disease
3. Mixed dementia
4. Frontotemporal dementia

✅ Correct Answer: 3

Which disease of dementia increases the likelihood of young-onset Alzheimer's?

1. Frontotemporal dementia
2. Posterior cortical atrophy
3. Down syndrome
4. Normal pressure hydrocephalus

✅ Correct Answer: 3

What is ARDSI?

1. Alzheimer’s and related Disorders Society of India
2. Act related to Dementia, Symptoms and Infection
3. Alzheimer’s and related Dementia Symptoms of India
4. None of the above

✅ Correct Answer: 1

Which of the following statements is/are correct about mnemonics?

1. Mnemonic systems are techniques or strategies consciously used to improve memory.
2. The study and development of systems for improving and assisting the memory.
3. A device of any learning technique that aids information retention or retrieval in the human memory and it is a symbol used to specify a computing function.
4. All the above are correct

✅ Correct Answer: 4

Which of the following statement is/are correct about Enzyme:

1. An Enzyme is a protein and is used as a catalyst to accelerate the reaction.
2. Life would not exist without the presence of enzymes.
3. Enzymes participate in cellular metabolic processes.
4. All the above

✅ Correct Answer: 4

Which enzyme is used in making Baby Foods?

1. Amylase
2. Rennin
3. Trypsin
4. None of the above

✅ Correct Answer: 3

Name an enzyme that is derived from the stomachs of young ruminant animals and also used in dairy industry to produce cheese?

1. Trypsin
2. Pepsin
3. Liginase
4. Rennin

✅ Correct Answer: 4

Name an enzyme that digests fat?

1. Lipase
2. Sucrase
3. Maltase
4. Fructose

✅ Correct Answer: 1

Who coined the word enzyme?

1. Wilhelm Kuhne
2. Alfred Russel
3. Robert Koch
4. Rosalind Franklin

✅ Correct Answer: 1

Name an enzyme which is not proteinaceous in nature?

1. Cellulases
2. Xylanases
3. Ribozyme
4. Peptidiase

✅ Correct Answer: 3

Which enzyme is used by the biscuit manufacturers to lower the protein level of flour?

1. Amylase
2. Protease
3. Cellulase
4. Xylanase

✅ Correct Answer: 2

Inactive enzymes which are not bound to their cofactors are called

1. Apoenzymes
2. Coenzymes
3. Enzyme inhibitors
4. Holoenzymes

✅ Correct Answer: 1

In humans salivary amylase enzyme breaks down starch. The optimum pH for this reaction is:

1. 6
2. 6.2
3. 6.4
4. 6.7

✅ Correct Answer: 4