Biology Online Quiz Test 06

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Biology Online Quizzes

Biology Quiz Test 06 test contains multiple-choice questions with answers for competitive exam preparation. We have provided Biology online quizzes below which include questions related to different topics.

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Biology Quiz Test 06

Mitochondria in ear lobe cells are nearly
(A) 40
(B) 50
(C) 55
(D) 60

Answer
50

Pulling upward of water and dissolved minerals towards the leaves through the xylem tissue is called
(A) Transpiration pull
(B) Root pressure
(C) Ascent of sap
(D) All of these

Answer
Transpiration pull

Midgut in cockroach is a short narrow tube called
(A) Hepatic caeca
(B) Gizzard
(C) Stomach
(D) Rectum

Answer
Stomach

The branch of biology which deals with the study of social behavior and communal life of human beings living in any environment is called
(A) Environmental biology
(B) Social biology
(C) Human biology
(D) Both B and C

Answer
Social biology

The chloroplasts of diatoms and chrysophycean algae do not possess
(A) Chloryphyllpigments
(B) Enzymes for photolysis
(C) Defined grana and stroma
(D) Carotenes with chlorophylls

Answer
Defined grana and stroma

_______ respiration is directly involved in the production of energy, necessary for all living activities?
(A) Organismic
(B) Cellular
(C) Both A and B
(D) None of these

Answer
Cellular

Co-ordination results in
(A) Regulation of body functions
(B) Organization of body functions
(C) Integration of body functions
(D) All of these

Answer
All of these

Number of cervical vertebrae is
(A) 5
(B) 6
(C) 9
(D) 12

Answer
7

Cellular digestion is associated with which organelle
(A) Mitochondria
(B) Golgi bodies
(C) Plastids
(D) Lysosomes

Answer
Lysosomes

Highest form of learning is
(A) Latent learning
(B) Insight learning
(C) Operant conditioning
(D) Instinct

Answer
Insight learning

Complex symptoms like severe pneumonia vascular tumor sudden weight loss swollen lymph nodes and immune deficiency are features of
(A) Polio
(B) Hepatitis
(C) AIDS
(D) HIV

Answer
AIDS

Animals fats are ______________ atroom temperature?
(A) Liquids
(B) Gases
(C) Solids
(D) None of these

Answer
Solids

The type of learning in which there is loss or decrease in response to repeated stimuli?
(A) Imprinting
(B) Habituation
(C) Latent learning
(D) Insight learning

Answer
Habituation

Different species of plants and animals living in the same habitat is called
(A) Population
(B) Community
(C) Biome
(D) Habitat

Answer
Community

How many spiracles are present in cockroach
(A) 5
(B) 10
(C) 20
(D) 40

Answer
20

A compound produced as a result of a chemical reaction of an alcohol with an acid in which water molecule is released is called
(A) Monosaccharide
(B) Fatty acid
(C) Neutral lipid
(D) Nucleic acid

Answer
Neutral lipid

Snails belong to
(A) Cephalopodsxc
(B) Gastropods
(C) Bivalves
(D) Athropods

Answer
Gastropods

Cooley s anemia is another name used for
(A) Leucemia
(B) Thalassaemia
(C) Sickle cell anemia
(D) None of these

Answer
Thalassaemia

A bond formed by linkage between -OH of carboxyl group of one amino acid and H of amino group of another amino acid which releases water is called
(A) Phosphodiester linkage
(B) Glycosidic bond
(C) Peptide bond
(D) Hydrogen bond

Answer
Peptide bond

Collagen fibers of bone are hardened by deposition of
(A) Ca & PO4
(B) CaCO3
(C) CaSO4
(D) SiO2

Answer
Ca & PO4

Ecdysone is
(A) An enzyme that digest endocuticle during an arthropodal ecdysis
(B) A newly formed exoskeleton in authropods
(C) A hormone that regulates moulting in arthropods
(D) A process that involves moulting

Answer
A hormone that regulates moulting in arthropods

Central nervous system of man consists of
(A) Brain
(B) Spinal cord
(C) Both of these
(D) none of these

Answer
Both of these

How many species of mushrooms are edible?
(A) 100
(B) 4000
(C) 3000
(D) 200

Answer
200

The one that stores calcium is
(A) Sarcolemma
(B) Sarcoplasm
(C) Sarcoplasmic reticulum
(D) Cytosol

Answer
Sarcoplasmic reticulum

If two ends of fractured bone are opened and kept united via screws and wires drilled in bone substance. This step in fracture repair is called
(A) Open reduction
(B) Closed Fixation
(C) Open fixation
(D) Immobilization

Answer
Open reduction

Magnesium is present in which of the following
(A) Cytochromes
(B) ATP
(C) Chlorophyll
(D) Haemoglobin

Answer
Chlorophyll

In man which organisms cause abscesses on the skin of arms or legs?
(A) Ascaris
(B) Bacteria
(C) Ring worm
(D) Suinea worm

Answer
Suinea worm

In Urea cycle __________ ammonia molecules combine with 1 CO2 molecule to form 1 molecule of urea
(A) 1
(B) 2
(C) 3
(D) 4

Answer
2

n Hardy-Weinberg formula P2 represents frequency of
(A) Recessive allele
(B) Dominant allele
(C) Homozygous dominant individual
(D) Homozygous recessive individual

Answer
Homozygous dominant individual

Specific heat of vaporization of water is
(A) 574 Kcal/kg
(B) 674 Kcal/kg
(C) 774 Kcal/kg
(D) 874 Kcal/kg

Answer
574 Kcal/kg

Functional unit of DNA Is
(A) Nucleus
(B) Genes
(C) Chromosomes
(D) Nucleolus

Answer
Genes

The uptake of water in plants involves
(A) Active transport
(B) Passive transport
(C) Both A and B
(D) None of these

Answer
Passive transport

Addition of salts and other solutes from other cells into xylem sap, __________ the water potential of the xylem sap
(A) Increases
(B) Lowers
(C) Doesn’t effect
(D) Maintains

Answer
Lowers

In life cycle of Pinus megaspores produced by megasporangium divide into 4 megaspores by
(A) Mitosis
(B) Meiosis
(C) Both depending upon the conditions
(D) None of these

Answer
Meiosis

All of the following are similarities between nervous and endocrine system except
(A) Produce chemical messengers
(B) Release chemical messengers in extracellular space
(C) Homestatic in function
(D) Having slow but prolonged effects

Answer
Having slow but prolonged effects

Factory of Ribosomal systhesis is
(A) Cytoplasm
(B) Nucleus
(C) Nucleolus
(D) Endoplasmic reticulum

Answer
Nucleolus

Penicillium reproduce via
(A) Spores
(B) Conidia
(C) Budding
(D) Fragmentation

Answer
Conidia

Abscisic acid promotes flowering in short day plants and inhibits in long day plants, which of the following is antagonistic to abscisic acid in terms of flowering
(A) Gibberellins
(B) Cytokinins
(C) Auxins
(D) Ethene

Answer
Gibberellins

Constricting ring around nematode is formed by
(A) Arthrobotrys
(B) Pleurotus ostreatus
(C) Mildews
(D) All of these

Answer
Arthrobotrys

Photosynthesis carried out by terrestrial plants is _________ of total photosynthesis?
(A) 1-2%
(B) 5%
(C) 10%
(D) 20%

Answer
10%

The monosaccharide found in some bacteria and occurring rarely are
(A) Trioses
(B) Hexoses
(C) Tetroses
(D) Pentoses

Answer
Tetroses

Reduction in photosynthesis is of
(A) O2
(B) CO2
(C) H2O
(D) light energy

Answer
CO2

Cyanobacteria reproduce by
(A) Binary fission
(B) Mitosis
(C) Meiosis
(D) Conjugation

Answer
Binary fission

Incomplete or imperfect digestion is known as
(A) Obesity
(B) Dyspepsia
(C) Anorexia nervous
(D) Bulimia nervosa

Answer
Dyspepsia

On average there are _______ or more thylakoid per granum?
(A) 60
(B) 50
(C) 40
(D) 70

Answer
50

A disease of longs in which inside of the lungs is damaged resulting in cough and fever? Lung cancer Asthma Emphysema Pulmonary tuberculosis
(A) Lung cancer
(B) Asthma
(C) Emphysema
(D) Pulmonary tuberculosis

Answer
Emphysema

How many vertebrae are present in thoracic region?
(A) 7
(B) 12
(C) 5
(D) 4

Answer
12

lubb sound is produced due to
(A) Opening of inlet valve
(B) Closure of inlet valve
(C) Opening of outlet valve
(D) Closure of outlet valve

Answer
Closure of inlet valve

In human body 99% of total mass is formed of
(A) 16 Bio-elements
(B) 12 Bio-elements
(C) 10 Bio-elements
(D) 6 Bio-elements

Answer
6 Bio-elements

Stomata cover only ______________ of leaf surface?
(A) 0.03 – 0.04%
(B) 10%
(C) 1-2 %
(D) 50%

Answer
1-2 %

Mammalian kidney, under restricted water supply can conserve water by over ________ % reabsorption of glomerular filtrate
(A) 80.50%
(B) 90.50%
(C) 95.50%
(D) 99.50%

Answer
99.50%

Acromegaly is caused due to oversecretion of
(A) STH
(B) TSH
(C) ACTH
(D) Thyroxin

Answer
Thyroxin

Alternation of generations is absent in
(A) Hydration
(B) Obelia
(C) Jelly fish
(D) Physalia

Answer
Hydration

Mitosis is divided into
(A) Karyokinesis
(B) Cytokinesis
(C) Interphase
(D) Both A & B

Answer
Both A & B

Empty diatom cells are called
(A) Raphe
(B) Valves
(C) Frustule
(D) Girdles

Answer
Frustule

Removal or degradation of environmental pollutants or toxic materials by living organisms is called
(A) Integrated disease management
(B) Hydroponic culture technique
(C) Pasteurization
(D) Bioremediation

Answer
Bioremediation

______ is essential for the formation of hemoglobin.
(A) Calcium
(B) Iron
(C) Water
(D) Carbohydrates

Answer
Iron

Group of living organisms of the same species living in the same place at the same time is called ?
(A) Community
(B) Population
(C) Ecosystem
(D) Biome

Answer
Population

Rapid movement of leaves of mimosa on touching is an example of
(A) Turgor movement
(B) Nastic movement
(C) Tropic movements
(D) Growth movement

Answer
Turgor movement

The cell wall is usually composed of two overlapping halves called epitheca and hypotheca in
(A) Diatoms
(B) Desmids
(C) Pyrrophyta
(D) Chlorophyta

Answer
Diatoms

Gaseous exchange in birds occurs at level of
(A) Alveoli
(B) Air sacs
(C) Bronchi
(D) Parabronchi

Answer
Parabronchi

Cellular respiration is essentially a/an _____________ process?
(A) Oxidation
(B) Reduction
(C) Redox
(D) None of the above

Answer
Oxidation

Important factors which affect the capacity of haemoglobin to combine with oxygen is
(A) Temperature
(B) Carbon dioxide
(C) pH
(D) All of these

Answer
All of these

Enteron in coelenterates acts as
(A) Digestive cavity
(B) Body cavity
(C) Transporting cavity
(D) All of these

Answer
all of these

Pinus Taxus and Picea belong to
(A) Spheospsida
(B) Filicineae
(C) Gymnosperms
(D) Angiosperms

Answer
Gymnosperms

Mantle in molluscs is present over
(A) Head
(B) Ventral muscular foot
(C) Dorsal visceral region
(D) All of these

Answer
Dorsal visceral region

Sperms are _________ in origin
(A) Ectodermal
(B) Mesodermal
(C) Endodermal
(D) None of these

Answer
Mesodermal

The human naked eye can differentiate between two points which are __________ apart?
(A) 1.0 mm
(B) 0.1 mm
(C) 1.0 cm
(D) 1.0 dm

Answer
1.0 mm

A three dimensional dcavity bearing a specific charge by which the enzyme reacts with its substrate is called
(A) Active site
(B) Binding site
(C) Catalytic site
(D) Allosteric site

Answer
Active site

An example of codominance is
(A) A’ blood group
(B) B’ blood group
(C) O’ blood group
(D) AB’ blood group

Answer
AB’ blood group

The mechanism for ATP synthesis is
(A) Chemosynthesis
(B) Photosynthesis
(C) Phosphorylation
(D) Chemiosmosis

Answer
Chemiosmosis

The one which is present in all aerobic species is
(A) Cytochrome c
(B) Cytochrome a
(C) Cytochrome a3
(D) Cytochrome b

Answer
Cytochrome c

Coelom that develops from the archenteron as outpouching is
(A) Pseudocoelom
(B) Enterocoelom
(C) Schizocoelom
(D) None of these

Answer
Enterocoelom

In planaria, numerous small branches which end blindly are called as
(A) Digestive tract
(B) Intestinal caeca
(C) Hepatic caeca
(D) Both B & C

Answer
Intestinal caeca

ATP is a an important molecule for its major function
(A) As an energy currency of the cell
(B) As a coenzyme
(C) Both A and B
(D) None of these

Answer
As an energy currency of the cell

The greatest diversity of animals in the lake is found in which one of the following zones?
(A) Limmnetic zone
(B) Littoral zone
(C) Profundal zone
(D) None of these

Answer
Littoral zone

The skeleton of the sponges is in the form of variously shaped needle like structures called
(A) Stripules
(B) Spicules
(C) Brails
(D) Spines

Answer
Spicules

________ potential is the measure of the change in water potential of a system due to the presence of solute molecules?
(A) Osmotic
(B) Pressure
(C) Both A and B
(D) None of these

Answer
Osmotic

The skeleton of sponges is made up of
(A) Calcium
(B) Silica
(C) Both of these
(D) None of these

Answer
Both of these

The characteristic which enable animals to tolerate dehydration is called
(A) Osmoconformation
(B) Osmoregulation
(C) Anhydrobiotic
(D) Anhydrosis

Answer
Anhydrobiosis

Each turn of DNA contain ____________ nitrogenous base pairs?
(A) 5
(B) 10
(C) 20
(D) 25

Answer
10

Ribosomes are tiny Granules first studied in 1955 by
(A) De-Duve
(B) Schwann
(C) August Weismann
(D) Palade

Answer
De-Duve

Rapid growth at exponential ration occurs in which phase of bacterial growth
(A) Lag phase
(B) Log phase
(C) Stationary phase
(D) Death / decline phase

Answer
Log phase

The contraction of which of the following muscle fibers, is controlled by hormones?
(A) A smooth muscle
(B) A cardiac muscle
(C) A skeletal muscle
(D) All of these

Answer
A smooth muscle

Chemically auxins are
(A) Indole propionic acid
(B) Indole carboxylic acid
(C) Indole acetaldehyde
(D) Indole acetic acid

Answer
Indole acetic acid

n all plants the major sites of phosynthesis are
(A) Leaves respire and utilize O2 and release CO2
(B) Stems
(C) Roots
(D) Branches

Answer
Leaves respire and utilize O2 and release CO2

In a hot summer after noon, if your body’s Homeostatic machinery keep your internal temperature quite lower than that of external than this is an example of
(A) Positive feed back
(B) Negative feed back
(C) Feed back
(D) Osmoregulation

Answer
Negative feed back

Gut in pseudocoelomates is made from
(A) Ectoderm
(B) Mesoderm
(C) Endoderm
(D) All of these

Answer
Endoderm

Diatoms are found in
(A) Phytoplanktonic population
(B) Freshwater lakes and ponds
(C) Marine environment
(D) All of the above

Answer
All of the above

Commonly in other plants than tall ones the speed of upward movement of water is
(A) 8mh-1
(B) 1 mh-1
(C) 7 mh-1
(D) 4 mh-1

Answer
1 mh-1

hotosynthesis is process in which ________ compounds of carbon (CO2) and hydrogen (H2O) are reduced to carbohydrate like (glucose) using light energy
(A) Organic
(B) Energy rich
(C) Energy poor
(D) Reduced

Answer
Energy poor

Lipids are soluble in which of the following
(A) Water
(B) Ether
(C) All solvents
(D) None of these

Answer
Ether

The following vegetable have 90% of water?
(A) Cabbage
(B) Lady finger(okra)
(C) Cassava
(D) None of these

Answer
Lady finger(okra)

Those organisms which can prepare their own food from simple inorganic material and can store energy are called
(A) Autotrophs
(B) Heterotrophs
(C) Procariotique
(D) Eu-cariotique

Answer
Autotrophs

Non polar organic molecules are ___________ in water?
(A) Soluble
(B) Insoluble
(C) Partially soluble
(D) Depends upon condition

Answer
Insoluble

______ function as multisensory hydraulic valve?
(A) Lenticels
(B) Guard cells
(C) Hydathods
(D) All of these

Answer
Guard cells

Cell wall is the non living , outermost boundary of __________cell?
(A) plant
(B) bacterial
(C) fungal
(D) All of the above

Answer
All of the above

A substance which binds at the active site of the enzyme but does not result in the formation of the products is called________________?
(A) Irreversible inhibitor
(B) Competitive inhibitor
(C) Reversible inhibitor
(D) Non-competitive inhibitor

Answer
Competitive inhibitor

Proteins comprise of ___________% of the total dry weight of a cell?
(A) 40%
(B) 50%
(C) 60%
(D) 70%

Answer
50%

How many vertebrae are present in vertebral column of man?
(A) 33 vertebrae
(B) 33 pairs of vertebrae
(C) 25 vertebrae
(D) 31 vertebrae

Answer
33 vertebrae

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