Olete.in – MCQs, Mock Tests & Government Job Prep | Biology MCQs Question and Answer -Biology Set 2

How many grams of carbohydrate is present in a hen’s egg?

1. 0.61 g
2. 0.5 g
3. 1.3 g
4. 2.5 g

✅ Correct Answer: 1

What is the total number of permanent incisors in both the upper and lower jaws of the cattle and buffaloes?

1. 4
2. 8
3. 12
4. 16

✅ Correct Answer: 2

What is the gestation period of camel?

1. 280 to 300 days
2. 320 to 350 days
3. 365 to 400 days
4. 425 to 440 days

✅ Correct Answer: 2

From which of the following part of a plant opium is obtained?

1. Dried leaves
2. Dried latex
3. Roots
4. Stem bark

✅ Correct Answer: 2

Which of the following crop is affected by the "early blight" disease?

1. Potato
2. Rice
3. Sugarcane
4. Wheat

✅ Correct Answer: 1

Where is the Central Drug Research Institute of India is located?

1. Delhi
2. Bangalore
3. Madras
4. Lucknow

✅ Correct Answer: 4

Which of the following deficiency causes the dietary deficiency of Xerophthalmia?

1. Protein
2. Vitamin A
3. Riboflavin
4. Unsaturated fatty acids, linoleic and linolenic acids

✅ Correct Answer: 2

How many HIV positive infections that are occurring everyday in the world?

1. 6,000
2. 60,000
3. 600,000
4. 1,000,000

✅ Correct Answer: 1

Bombyx mori, that produces fine filaments of silk inside the cocoon, is a:

1. Butterfly
2. Dipteran (silkworm)
3. Moth
4. Mulberry plant hemipteran

✅ Correct Answer: 3

Why was DDT banned which an organ chlorine compound, used first to control malaria, carried in mosquitoes and later to a variety to insect pests?

1. It brings about a change in sex chromosomes
2. It persists in the environment and bio-accumulates
3. It increases its affinity hundred-fold for haemoglobin preventing its coupling with oxygen
4. All of these

✅ Correct Answer: 2

What is the reason behind the small shrunken scrotal of an adult bulls straying on Delhi roads?

1. Congenital defect
2. Negative feedback due to extremely high levels of testosterone
3. Castration
4. All of these

✅ Correct Answer: 3

Which of the following components increases the effectiveness of the Photosynthesis process?

1. Ultraviolet
2. Red
3. Blue
4. Infrared

✅ Correct Answer: 2

What is the weight of human heart?

1. 100 gms
2. 300 gms
3. 800 gms
4. 1000 gms

✅ Correct Answer: 2

Which of the following gland controls the blood pressure?

1. Thalamus gland
2. Adrenal gland
3. Thyroid gland
4. Pancreas gland

✅ Correct Answer: 2

In which organ of the human body are the lymphocyte cells formed?

1. Liver
2. Long bone
3. Pancreas
4. Spleen

✅ Correct Answer: 2

Which of the following is one of the functions of antigen?

1. Lowers body temperature
2. Destroys harmful bacteria
3. Triggers the immune system
4. Used as an antidote to poison

✅ Correct Answer: 2

Which of the following process that does not involve evolution of CO2?

1. Combustion
2. Respiration
3. Fermentation
4. Photosynthesis

✅ Correct Answer: 4

Name the Glands associated with the Human Digestive System?

1. Salivary Glands and Pancreas
2. Salivary Glands and Liver
3. Liver and Pancreas
4. Salivary Glands, Liver & Pancreas

✅ Correct Answer: 4

Arrange the correct sequence of the steps involved in the process of Human Digestive System?

1. Digestion, Ingestion, Assimilation, Egestion and Absorption
2. Ingestion, Digestion, Absorption, Assimilation and Egestion
3. Egestion, Absorption, Digestion, Assimilation and Ingestion
4. Assimilation, Absorption, Ingestion, Digestion and Egestion

✅ Correct Answer: 2

In which part of the body digestion of protein begins?

1. Pancreas
2. Stomach
3. Small Intestine
4. Large Intestine

✅ Correct Answer: 2

Name the largest part of the Alimentary canal?

1. Large Intestine
2. Small Intestine
3. Liver
4. Stomach

✅ Correct Answer: 2

Complete digestion of food occurs in:

1. Stomach
2. Small Intestine
3. Pancreas
4. Large Intestine

✅ Correct Answer: 2

What is the function of Bile Juice secreted by Liver?

1. It makes the food alkaline.
2. It makes the food acidic.
3. It breaks down the food.
4. None of the above

✅ Correct Answer: 1

Name the hardest material present in the body?

1. Dentin
2. Pulp
3. Enamel
4. None of the above

✅ Correct Answer: 3

In which part of our body food gets absorbed?

1. Small Intestine
2. Large Intestine
3. Stomach
4. Liver

✅ Correct Answer: 1

The undigested food stored in the liver in the form of carbohydrate is called:

1. Pulp
2. Glucose
3. Glycogen
4. Carbohydrate

✅ Correct Answer: 3

Name the process through which much needed oxygen is supplied to all the cells of the plants?

1. Diffusion
2. Endosmosis
3. Exosmosis
4. Photosynthesis

✅ Correct Answer: 1

Due to Water logging:

1. An air is expelled from in-between the particles of soil.
2. Oxygen becomes unavailable to the roots of the plants.
3. Plants respire anaerobically which produces alcohol and kill them.
4. All the above are correct.

✅ Correct Answer: 4

Respiration in Plants takes place through:

1. Stomata
2. Stomata
3. Both A and B
4. Only A

✅ Correct Answer: 3

Consider the following statements:

1. Respiration takes place both day and night.
2. Photosynthesis occurs during day time only.
3. Both A and B are correct.
4. Neither A nor B are correct.

✅ Correct Answer: 3

Some plants store waste in their fruits in the form of solid bodies called:

1. Raphides
2. Lenticels
3. Stomata
4. Resins

✅ Correct Answer: 1

Name the waste products secreted by Plants?

1. Carbon Dioxide
2. Oxygen
3. Water Vapour
4. All are correct.

✅ Correct Answer: 4

Name an extension of the epidermal cells of a root which is in direct contact with the soil?

1. Root Hairs
2. Internodes
3. Bundle Scars
4. Pith

✅ Correct Answer: 1

What is the process of intake of nutrients by an organism as well as the utilisation of these nutrients by the organisms called?

1. Nutrition
2. Photosynthesis
3. Chloroplasts
4. Digestion

✅ Correct Answer: 1

The mode of nutrition in which an organism makes its own food from the simple inorganic material like carbon dioxide and water present in the surrounding is called:

1. Heterotrophic nutrition
2. Saprotrophic nutrition
3. Autotrophic nutrition
4. Holozoic nutrition

✅ Correct Answer: 3

What is the mode of nutrition called in which organisms cannot make its own food from simple inorganic material and depends on other organisms for its food?

1. Autotrophic nutrition
2. Heterotrophic nutrition
3. Parasitic nutrition
4. Holozoic nutrition

✅ Correct Answer: 2

When an organism obtains its food from decaying organic matter of dead plants, dead animals and rotten bread, etc., it is called:

1. Parasitic nutrition
2. Autotrophic nutrition
3. Holozoic nutrition
4. Saprotrophic nutrition

✅ Correct Answer: 4

The nutrition in which an organism derives its food from the body of another living organism without killing it, it’s called:

1. Saprotrophic nutrition
2. Parasitic nutrition
3. Holozoic nutrition
4. Autotrophic nutrition

✅ Correct Answer: 2

The nutrition in which an organism takes the complex organic food materials into its body by the process of ingestion, the ingested food is digested and then absorbed into the body cells of the organism:

1. Parasitic nutrition
2. Autotrophic nutrition
3. Holozoic nutrition
4. Heterotrophic nutrition

✅ Correct Answer: 3

The process by which green plants make their own food from carbon dioxide and water by using sunlight energy in the presence of chlorophyll, is called:

1. Xanthophylls
2. Stomata
3. Photosynthesis
4. Chloroplast

✅ Correct Answer: 3

Animals which eat only plants are called:

1. Herbivores
2. Omnivores
3. Carnivores
4. None of the above

✅ Correct Answer: 1

What is the process of taking food into the body called?

1. Digestion
2. Assimilation
3. Ingestion
4. Egestion

✅ Correct Answer: 3

The process of removal of toxic wastes from the body of an organism is called:

1. Transport
2. Respiration
3. Excretion
4. Nutrition

✅ Correct Answer: 3

The movement of a plant part in response to light is called:

1. Phototropism
2. Geotropism
3. Chemotropism
4. Hydrotropism

✅ Correct Answer: 1

The movement of plant part in response to gravity is called:

1. Thigmotropism
2. Thigmotropism
3. Phototropism
4. Geotropism

✅ Correct Answer: 4

The movement of a plant part in response to a chemical stimulus is called:

1. Hydrotropism
2. Chemotropism
3. Thigmotropsim
4. Phototropism

✅ Correct Answer: 2

The movement of a plant part in response to water is called:

1. Geotropism
2. Hydrotropism
3. Chemotropism
4. Thigmotropism

✅ Correct Answer: 2

The directional movement of a plant part in response to the touch of an object is called:

1. Phototropism
2. Geotropism
3. Thigmotropism
4. Hydrotropism

✅ Correct Answer: 3

The non-directional movement of a plant part in response to the touch of an object is called:

1. Thigmotropism
2. Thigmonasty
3. Phototropism
4. Photonasty

✅ Correct Answer: 2

The pad-like swelling at the base of each leaf of a sensitive plant is called:

1. Pistol
2. Scape
3. Pulvini
4. Foliage

✅ Correct Answer: 3

The non-directional movement of a plant part in response to light is called:

1. Phototropism
2. Thigmotropism
3. Geotropism
4. Photonasty

✅ Correct Answer: 4

The shorter fibres on the body of a neuron are called:

1. Dendrites
2. Axon
3. Cytoplasm
4. Myelin sheath

✅ Correct Answer: 1

The longest fibre on the cell body of a neuron is called:

1. Myelin
2. Nerve endings
3. Axon
4. Dendrites

✅ Correct Answer: 3

The axon passes the impulse to another neuron through a junction called:

1. Nerve endings
2. Synapse
3. Cytoplasm
4. Nucleus

✅ Correct Answer: 2

What are those reflex actions called which involve brain?

1. Reflex arcs
2. Reflex arcs
3. Spinal reflexes
4. None of the above

✅ Correct Answer: 2

The chemical substances which coordinate the activities of living organisms and also their growth are called:

1. Hormones
2. Blood
3. Sodium
4. Cytoplasm

✅ Correct Answer: 1

When the parent organism splits to form two new organisms, it is called:

1. Budding
2. Spore formation
3. Binary fission
4. Multiple fission

✅ Correct Answer: 3

The process of getting back a full organism from its body part is called:

1. Spore formation
2. Budding
3. Regeneration
4. Fragmentation

✅ Correct Answer: 3

The breaking up of the body of a simple organism into two or more pieces on maturing, each of which subsequently grows to form a complete new organism, is called:

1. Fragmentation
2. Vegetative propagation
3. Binary fission
4. Binary fission

✅ Correct Answer: 1

When new plants are obtained from the parts of old plants, without the help of any reproductive organs, it is called:

1. Vegetative propagation
2. Spore formation
3. Fragmentation
4. Multiple fission

✅ Correct Answer: 1

When the cut stems of two different plants are joined together in such a way that the two stems join and grow as a single plant, it is called:

1. Cutting
2. Layering
3. Grafting
4. None of the above

✅ Correct Answer: 3

The transfer of pollen grains the anther of a stamen to the stigma of a carpel is called:

1. Germination
2. Pollination
3. Fertilisation
4. Tissue culture

✅ Correct Answer: 2

Those organs which have same basic structure but different functions are called:

1. Analogous organs
2. Speciation
3. Fossils
4. Homologous organs

✅ Correct Answer: 3

Those organs which have different basic structure but have similar appearance and perform similar functions are called:

1. Fossils
2. Analogous organs
3. Homologous organs
4. Speciation

✅ Correct Answer: 2

What are those animals called which eat both plants and animals?

1. Omnivores
2. Herbivores
3. Carnivores
4. Decomposers

✅ Correct Answer: 1

What is the shedding of flowers, leaves and fruits followed by formation of scar tissue in a plant called?

1. Abscission
2. Abscisic acid
3. Deciduous
4. Mitosis

✅ Correct Answer: 1

A group of glands which produce various hormones is called:

1. Respiratory system
2. Excretion
3. Endocrine system
4. Central nervous system

✅ Correct Answer: 3

Organic constituents of soil formed by complete or partial decomposition of plant and animal material is called:

1. Fauna
2. Humus
3. Fossil
4. Compost

✅ Correct Answer: 2

The complex feeding relationships within a community is called:

1. Food chain
2. Food web
3. Trophic level
4. All of the above

✅ Correct Answer: 2

What are heterotrophs, mostly bacteria and fungi, when obtain food by breaking down substances in dead protoplasm are called:

1. Omnivores
2. Herbivores
3. Decomposers
4. Carnivores

✅ Correct Answer: 3

What is the act of supplying water to a field through artificial means called?

1. Irrigation
2. Insecticide
3. Fungicide
4. Monoculture

✅ Correct Answer: 1

What is ploughing and cultivating the land called?

1. Irrigation
2. Domestication
3. Tilling
4. Weeding

✅ Correct Answer: 3

In photosynthesis dark reaction, is called so because-

1. It occurs in dark.
2. It does not require light energy.
3. It cannot occur during daytime.
4. It occurs more rapidly at night.

✅ Correct Answer: 2

Rate of photosynthesis does not depend upon:

1. Quality of light
2. Intensity of Light
3. Duration of Light
4. Temperature

✅ Correct Answer: 3

For photosynthesis green plants require:

1. Chlorophyll only
2. Light
3. Carbon dioxide and water
4. All of the above

✅ Correct Answer: 4

Photosynthesis is a _____ process.

1. Catabolic
2. Anabolic
3. Exothermic
4. Metabolic

✅ Correct Answer: 2

Name the pigment which is responsible for absorption of light in plants?

1. Chlorophyll
2. Stoma
3. Xylem
4. Phloem

✅ Correct Answer: 1

In bacteria name the colour of light which is responsible for photosynthesis?

1. Ultra-Violet
2. Blue
3. Red
4. None of the above

✅ Correct Answer: 3

Quantasomes are found in:

1. Cristae of mitochondria
2. Thylakoid membrane of chloroplasts
3. Nucleus membrane
4. Lysosome

✅ Correct Answer: 2