Biology Questions

Objective Question on Biology

  • Q.1 From the followings, ordinary baking soda is-

    1)Potassium chloride

    2) Sodium bicarbonate

    3) Potassium carbonate

    4) Potassium hydroxide

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  • Q.2 Pine, fir, spruce, cedar, larch and cypress are the famous timber-yielding plants of which several also occur widely in the hilly regions of India. All these belong to


    2) angiosperms

    3) monocotyledons

    4) dicotyledons

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  • Q.3 Ozone hole refers to-

    1)hole in ozone layer

    2) decrease in the ozone layer in troposphere

    3) increase in the thickness of ozone layer in troposphere

    4) decrease in thickness of ozone layer in stratosphere

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  • Q.4 Pollination is best defined as-

    1)transfer of pollen from anther to stigma

    2) germination of pollen grains

    3) growth of pollen tube in ovule

    4) visiting flowers by insects

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  • Q.5 Movement of cell against concentration gradient is called


    2) diffusion

    3) active transport

    4) passive transport

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  • Q.6 Plants receive their nutrients mainly from


    2) atmosphere

    3) light

    4) Soil

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  • Q.7 Which is/are the important raw material(s) required in cement industry?

    1)Gypsum and Clay

    2) Limestone and Clay

    3) Clay

    4) Limestone

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  • Q.8 Which type of fire extinguisher is used for petroleum fire?

    1)Powder type

    2) Liquid type

    3) Soda acid type

    4) Foam type

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  • Q.9 Detergents used for cleaning clothes and utensils contain?


    2) bismuthates

    3) nitrates

    4) sulphonates

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  • Q.10 Epoxy resins are used as


    2) insecticides

    3) adhesives

    4) moth repellents

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  • Q.11 Which of the following is commonly called a 'polyamide'?


    2) Terylene

    3) Nylon

    4) Orlon

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  • Q.12 What is the unit for measuring the amplitude of a sound?


    2) Coulomb

    3) Hum

    4) Cycles

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  • Q.13 Fathom is the unit of


    2) frequency

    3) depth

    4) distance

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  • Q.14 Reading of a barometer going down is an indication of


    2) intense heat

    3) snow

    4) rainfall

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  • Q.15 Decibel is the unit for

    1)speed of light

    2) intensity of sound

    3) radio wave frequency

    4) intensity of heat

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  • Q.16 One fathom is equal to

    1)6 feet

    2) 6 meters

    3) 60 feet

    4) 100 cm

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  • Q.17 Isotopes are separated by


    2) distillation

    3) sublimation

    4) filtration

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  • Q.18 Which of the following is used as a moderator in nuclear reactor?


    2) Graphite

    3) Radium

    4) Ordinary water

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  • Q.19 Atoms are composed of

    1)electrons and protons

    2) electrons only

    3) protons only

    4) electrons and nuclei

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  • Q.20 Which among the following is a positively charged particle emitted by a radioactive element?

    1)Beta ray

    2) Cathode ray

    3) Alpha ray

    4) Gamma ray

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  • Q.21 Photosynthesis generally takes place in which parts of the plant?

    1)Leaf and other chloroplast bearing parts

    2) stem and leaf

    3) Roots and chloroplast bearing parts

    4) Bark and leaf

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  • Q.22 One of the following is not a function of bones.

    1)Place for muscle attachment

    2) Protection of vital organs

    3) Secretion of hormones for calcium regulation in blood and bones

    4) Production of blood corpuscles

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  • Q.23 Most fish do not sink in water because of the presence of 1. Swim bladder 2. Air bladder 3. Air Sacs 4. Air in spongy bones

    1)I and II are correct

    2) II and III are correct

    3) III and IV are correct

    4) I, II, III and IV are correct

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  • Q.24 Plants synthesis protein from


    2) sugar

    3) amino acids

    4) fatty acids

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  • Q.25 Plants absorb dissolved nitrates from soil and convert them into


    2) free nitrogen

    3) ammonia

    4) proteins

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  • Q.26 Mycobacterium leprae causes leprosy, Corynebacterium diphtheria causes diphtheria and Vibrio comma causes


    2) influenza

    3) cholera

    4) typhoid

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  • Q.27 Oxyreductases, transferases, hydrolases, lyases, isomerases and ligases are all classes of


    2) enzymes

    3) proteins

    4) vitamins

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  • Q.28 Ptyalin is an enzyme produced in the

    1)salivary glands

    2) pituitary glands

    3) thyroid glands

    4) pancreas

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  • Q.29 Nitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false?

    1)By cyanobacteria

    2) By electrical discharges in the atmosphere

    3) By industrially synthesised fertilizer

    4) By denitrification

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  • Q.30 Pollen grains in plants are produced in


    2) leaves

    3) flower

    4) stem

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  • Q.31 Pollination by wind is called


    2) anemophily

    3) zoophily

    4) entomophily

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  • Q.32 Mutation is

    1)a factor responsible for plant growth

    2) a change which affects the offspring of F2 generation only

    3) a change that is inherited

    4) a change which affects the parents

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  • Q.33 Prokaryotic cells lack


    2) nuclear membrane

    3) membrane bound by organelles

    4) All of these

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  • Q.34 Plants absorb most part of water needed by them through their

    1)embryonic zone

    2) root hairs

    3) growing point

    4) zone of elongation

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  • Q.35 Plant development is influenced by

    1)quality of light only

    2) quality and quantity of light

    3) quality, quantity and duration of light

    4) quality and duration of light

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  • Q.36 Photo-oxidation is


    2) photolysis

    3) light and oxygen induced breakdown

    4) All of the above

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  • Q.37 Process of cell division can take place by


    2) mitosis

    3) fusion

    4) None of these

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  • Q.38 Most highly intelligent mammals are


    2) whales

    3) elephants

    4) kangaroos

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  • Q.39 Photosynthesis takes place faster in

    1)white light

    2) yellow light

    3) red light

    4) darkness

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  • Q.40 Nucleus, the genetic material containing rounded body in each cell, was first discovered in 1831 by

    1)Robert Hooke

    2) Robert Brown

    3) Rudolf Virchow

    4) Theodore Schwann

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  • Q.41 One of the following is most suitable for study of mutations


    2) Diploids

    3) Tetraploids

    4) Polyploid

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  • Q.42 Plants that grow under average temperature and moisture are called


    2) Hydrophytes

    3) Mesophytes

    4) Xerophytes

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  • Q.43 Pulses are a good source of


    2) Fats

    3) Proteins

    4) Vitamins

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  • Q.44 One day you wake with a sore throat and a runny nose. Your doctor takes a swab from your throat, sends it to a lab, and telephones you the next day to say that antibiotic will not help you get better. Which of the following is the most likely reason for the doctor's statement?

    1)Having waited a day, it is too late to take an antibiotic

    2) You need an antiseptic, not an antibiotic

    3) You need to be vaccinated instead of taking an antibiotic

    4) You are infected by a virus

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  • Q.45 Oxygen in our blood is transported by a protein named


    2) Keratin

    3) Haemoglobin

    4) Myoglobin

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  • Q.46 Nymph is the name of young one of


    2) Beetle

    3) Housefly

    4) Cockroach

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  • Q.47 Nucleus, the genetic material containing rounded body in each cell, was first discovered in 1831 by

    1)Robert Hooke

    2) Robert Brown

    3) Rudolf Virchow

    4) Theodore Schwann

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  • Q.48 Primary phloem develops from

    1)Lateral Meristem

    2) Protoderm

    3) Extrastelar Cambium

    4) Provascular Tissue

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  • Q.49 Other than spreading malaria, anopheles mosquitoes are also vectors of

    1)Dengue Fever

    2) Filariasis

    3) Encephalitis

    4) Yellow Fever

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  • Q.50 Plants that grow in saline water are called


    2) Hydrophytes

    3) Mesophytes

    4) Thallophytes

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  • Q.51 Pyorrhoea is a disease of the


    2) Gums

    3) Heart

    4) Lungs

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  • Q.52 Most common disease of poultry in India is

    1)Fowl Pox

    2) Ranikhet

    3) Tick Fever

    4) Coryza

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  • Q.53 Most abundant tissues of our body are


    2) Muscular

    3) Epithelial

    4) Nervous

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  • Q.54 Mumps is a disease caused by


    2) Bacterium

    3) Virus

    4) All Of Them

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  • Q.55 Rain water helps to increase the ____ to some extent

    1)Phosphorous Contents

    2) Nitrogen Contents

    3) Potash Contents

    4) Calcium Contents

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  • Q.56 Number of chromosomes in Down's syndrome is


    2) 47

    3) 48

    4) 49

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  • Q.57 Plants are killed in winter by frost

    1)Because of Desiccation and Mechanical Damage to the Tissues

    2) Because No Photosynthesis Takes Place at Such Low Temperature

    3) Because Respiration Ceases at Such Low Temperature

    4) Because There is No Transpiration

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  • Q.58 O2 released in the process of photosynthesis comes from


    2) Water

    3) Sugar

    4) Pyruvic Acid

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  • Q.59 Placenta is the structure formed

    1)By Foetus Only

    2) By Fusion of Germ Layers

    3) By the Union of Foetal and Uterine Tissue

    4) None of These

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  • Q.60 Plants hormone that induces cell division is


    2) Gibberellins

    3) Domins

    4) Kinins

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  • Q.61 Radish is a


    2) modified root

    3) conn

    4) tuber

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  • Q.62 Radioactivity is a phenomenon of the spontaneous emission of

    1)protons (alpha particles)

    2) electrons (beta particles)

    3) gamma rays (short wave electromagnetic waves)

    4) All of the above

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  • Q.63 Outer covering of virus made up of protein is


    2) coat

    3) virion

    4) viriod

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  • Q.64 Organic Substances which, in very small amounts, control growth and development called


    2) vitamins

    3) hormones

    4) none

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  • Q.65 Movements due to light are shown by

    1)flowering plants

    2) lower plants

    3) all land plants

    4) all the plants

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  • Q.66 Our major foods, fibres, spices, fruits and beverage crops are


    2) gymnosperms plants

    3) bryophytes

    4) flowering plants

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  • Q.67 Neurospora is used as genetic material because

    1)the product of single meiosis can be easily analysed

    2) it has short life cycle of 10 days

    3) meiotic products are linearly arranged in the form of ordered tetrad

    4) is a diploid fungus

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  • Q.68 N2 content is kept constant in the biosphere due to

    1)N2 fixation

    2) industrial pollution

    3) nitrogen cycle

    4) absorption of N2

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  • Q.69 Phloem is a tissue found in

    1)reproductive organs of animals

    2) plants

    3) insects

    4) mammals

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  • Q.70 Photosynthesis is a process

    1)reductive, endergonic and catabolic

    2) reductive and catabolic

    3) reductive and exergonic

    4) reductive, endergonic and anabolic

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  • Q.71 Monocot root differs from dicot root in having

    1)open vascular bundles

    2) scattered vascular bundles

    3) well developed pith

    4) radially arranged vascular bundles

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  • Q.72 On which of the following plants did Gregor Mendal perform his classical experiment?


    2) Gram

    3) Maize

    4) Wheat

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  • Q.73 Pigmentation of skin is due to


    2) melanocytes

    3) monocytes

    4) leucocytes

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  • Q.74 Night blindness is cause by lack of which vitamin?

    1)Vitamin A

    2) Vitamin B

    3) Vitamin C

    4) Vitamin D

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  • Q.75 Norepinephrine increases

    1)saliva production

    2) urine production

    3) respiration

    4) blood pressure

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  • Q.76 out of proteins, lipids and carbohydrates present in a cell membrane, what is true?

    1)Lipids are maximum

    2) Carbohydrates are minimum

    3) Carbohydrates are maximum

    4) All three are in equal proportion

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  • Q.77 Myopia is connected with


    2) heart

    3) eyes

    4) lungs

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  • Q.78 Potato is a modified form of


    2) root

    3) leaf

    4) fruit

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  • Q.79 Prothrombin which helps in clotting of blood is released by


    2) erythrocytes

    3) monocytes

    4) blood platelets

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  • Q.80 Which of the following is highest in hierarchy ?


    2) Subspecies

    3) Class

    4) Genus

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  • Q.81 Most of the red, blue and purple colours of plants are due to a pigment called


    2) carotene

    3) chlorophyll

    4) xanthophylls

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  • Q.82 Osmosis is the flow of solution from higher concentration to a solution of lower concentration through a semi permeable membrane. What is incorrect in this statement?

    1)Exact concentration of solution is not given

    2) Character of semi permeable membrane is not given

    3) The flow of solution is not possible through semi permeable membrane

    4) All are incorrect

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  • Q.83 Monotremes are unique mammals because they

    1)posses hair

    2) give birth to live young

    3) secret milk in a pouch

    4) lay eggs

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  • Q.84 Plant have ____ while animals lack it.


    2) cellulose

    3) protein

    4) fat

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  • Q.85 Poison glands of snakes are homologous to

    1)electric organs of fishes

    2) stings of rays

    3) sebaceous glands of mammals

    4) salivary glands of vertebrates

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  • Q.86 Plant bends towards the source of light on account of the movement of curvature known as


    2) thigmotropism

    3) chemotropism

    4) phototropism

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  • Q.87 Radical vascular bundles are those in which

    1)xylem and phloem occur on the different radii

    2) xylem is surrounded by phloem

    3) phloem is surrounded by xylem

    4) xylem and phloem occur on the same radius

    View Answer
  • Q.88 Plants developing in dry conditions are


    2) lithophytes

    3) xerophytes

    4) hydrophytes

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  • Q.89 Plants growing on sand are called as


    2) psammophytes

    3) oxylophytes

    4) chasmophytes

    View Answer
  • Q.90 Plants wilt due to excess of


    2) photosynthesis

    3) absorption

    4) All above

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  • Q.91 Normal adult human male has

    1)10 gram of haemoglobin/100 gram of blood

    2) 14 gram of haemoglobin/100 gram of blood

    3) 18 gram of haemoglobin/100 gram of blood

    4) 24 gram of haemoglobin/100 gram of blood

    View Answer
  • Q.92 Our skin, when exposed to excess sunlight, becomes dark. This is because our skin pigments called


    2) carotene

    3) melanin

    4) Xanthophyll

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  • Q.93 Ramapithecus and Cro-Magnon man are considered

    1)ancestors of monkey

    2) ancestors of lion

    3) ancestors of fox

    4) ancestors of modern man

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  • Q.94 Which of the following is a large blood vessel that carries blood away from the heart?


    2) artery

    3) capillary

    4) nerve

    View Answer
  • Q.95 Which of the following is an air-borne disease?


    2) typhoid

    3) both (a) and (b)

    4) None of the above

    View Answer
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