+1 Public Exam March 2019 Important One Mark Questions

Download Tamil Nadu 11th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.

Questions:

Multiple Choice Question

100 x 1 = 100

In systemic circulation, blood from the _________ ventricle is carried by a network of arteries, arterioles and capillaries to the tissues.

(a)

deoxygenated, right

(b)

oxygenated, left

(c)

oxygenated, right

(d)

deoxygenated, left

What is the percentage of lymphocytes among WBCs?

(a)

0.5% to 1.0%

(b)

1-3 %

(c)

65%

(d)

28%

Name the chronic respiratory disorder caused mainly by cigarette smoking _________

(a)

Emphysema

(b)

Asthma

(c)

Respiratory acidosis

(d)

Respiratory alkalosis

Which of the following respires through gills ____________

(a)

whale

(b)

Turtle

(c)

frog

(d)

Prawns

Gastrin is ____________

(a)

Hormone

(b)

enzyme

(c)

Nutrient

(d)

Digestive secretion

Which of the following is not a feature of frog?

(a)

presence of webbed deet

(b)

absence of teeth

(c)

smooth and moist skin

(d)

slender body

Identify the odd one

(a)

maltose

(b)

lactose

(c)

sucrose

(d)

sucrase

Which of the following is the last phase of the process of digestion?

(a)

ingestion

(b)

assimilation

(c)

egestion

(d)

digestion

Which of these is not found in connective tissue ___________

(a)

Collagen fibres

(b)

Basement membrane

(c)

Hyaluronic acid

(d)

Fluid

10.

Matrix of bone and cartilage can be distinguished by the presence of_____________

(a)

Lacunae

(b)

Chromatophares

(c)

Haversian canals

(d)

Adipose cells

11.

The cross between male lion and female tiger results in the production of __________

(a)

Mule

(b)

Tigon

(c)

Liger

(d)

Hinny

12.

A flower which can be divided into equal vertical halves, by more than one plane of division is __________.

(a)

zygomorphic

(b)

cyclic

(c)

actinomorphic

(d)

heteromorphic

13.

Nuclei are reassembled in __________ .

(a)

Independent assortment

(b)

Anaphase I

(c)

Telophase I

(d)

Meiosis II

14.

In plants, phragmoplast are formed between the daughter cells in ____________ .

(a)

Prophase

(b)

Metaphase

(c)

Anaphase

(d)

Telophase

15.

What is the habit of Colchicum?

(a)

Liliaceae

(b)

Polygonatum

(c)

Bulb

(d)

Corm

16.

____________________are called Power house of a cell.

(a)

Golgi bodies

(b)

Mitochondria

(c)

Mitochondrial DNA

(d)

Chloroplasts

17.

Smith defined it as the study of the origins j and properties of antisera _________.

(a)

Serotaxonomy

(b)

Molecular taxonomy

(c)

Phylogenetic tree

(d)

Restriction Fragment Length Polymorphism

18.

_____________________is a complex colloidal system which was suggested by Fisher in 1894 and Hardy.

(a)

Protoplasm

(b)

Homogeneous

(c)

Heterogeneous

(d)

Gel

19.

_________is a complete global account of a taxon of any rank.

(a)

Monograph

(b)

Catalogs

(c)

Luca Ghini

(d)

Herbaria

20.

The stele is split into distinct collateral vascular bundles around the pith is _________ .

(a)

Eustele

(b)

Protostele

(c)

Solenostele

(d)

Actinostele

21.

Lichen which grow on wood is called _________.

(a)

Lignicolous

(b)

Tericolous

(c)

Corticolous

(d)

Saxicolous

22.

Mycoplasma is very small and its ranges from __________.

(a)

0.1-0.5

(b)

0.1-5

(c)

0.2-0.3

(d)

2-3

23.

Plants grow on rocks is called ________.

(a)

Mesophytes

(b)

Xerophytes

(c)

lithophytes

(d)

Psammophytes

24.

The second largest animal phylum is ___________

(a)

Ctenophora

(b)

Arthropoda

(c)

Mollusca

(d)

Coelenterata

25.

The binomial name of National animal of lndia is ____________

(a)

Panthera tigris

(b)

Corvus splendens

(c)

Felis domestica

(d)

Liger

26.

A molecule of glycerol bond to have __________

(a)

5 fatty acids

(b)

6 fatty acids

(c)

4 fatty acids

(d)

3 fatty acids

27.

In a water molecule, the hydrogen and oxygen atom stick together by ___________

(a)

Monovalent bond

(b)

Covalent bond

(c)

Hydrogen bond

(d)

None of the above

28.

Select the correctly matched one

A) Human urine	i) Auxin –B
B) Corn gram oil	ii) GA₃
C) Fungus	iii) Abscisic acid II
D) Herring fish sperm	iv) Kinitin
E) Unripe maize grains	v) Auxin A
F) Young cotton bolls	vi) Zeatin

(a)

A	B	C	D	E	F
iii	iv	v	vi	i	ii

(b)

A	B	C	D	E	F
v	i	ii	iv	vi	iii

(c)

A	B	C	D	E	F
iii	v	vi	i	ii	iv

(d)

A	B	C	D	E	F
ii	iii	v	vi	iv	i

29.

________ is the powerful growth inhibitor

(a)

Ethanol

(b)

Cytokinins

(c)

ABA

(d)

Auxin

30.

If the diameter of the pulley is 12 inches, length of pointer is 10 inches and distance travelled by pointer is 5 inches. Calculate the actual growth in length of plant.

(a)

3 inches

(b)

6 inches

(c)

12 inches

(d)

30 inches

31.

Which of the following reaction is not involved in Kreb's cycle.

(a)

Shifting of phosphate from 3C to 2C

(b)

Splitting of Fructose 1,6 bisphosphate of into two molecules 3C compounds

(c)

Dephosphorylation from the substrates

(d)

All of these

32.

The compound which links glycolysis and Krebs cycle is _______.

(a)

Succinic acid

(b)

Pyruvic acid

(c)

Acetyl CoA

(d)

Citric acid

33.

The number of ATP molecules formed by complete oxidation of one molecule of pyruvic acid is _______.

(a)

(b)

(c)

(d)

34.

Identify true statement regarding light reaction of photosynthesis.

(a)

Splitting of water molecule is associate with PS I.

(b)

PS I and PS II involved in the formation of NADPH + H⁺

(c)

The reaction center of PS I is Chlorophyll a with absorption peak at 680 nm.

(d)

The reaction center of PS II is Chlorophyll a with absorption peak at 700 nm.

35.

Which chlorophyll molecule does not have a phytol tail?

(a)

Chl - a

(b)

Chl - b

(c)

Chl - c

(d)

Chl - d

36.

If a plant is provided with all mineral nutrients but, Mn concentration is increased, what will be the deficiency?

(a)

Mn prevent the uptake of Fe, Mg but not Ca

(b)

Mn increase the uptake of Fe, Mg and Ca

(c)

Only increase the uptake of Ca

(d)

Prevent the uptake Fe, Mg, and Ca

37.

Identify correct match.

1. Die back disease of citrus	(i) Mo
2. Whip tail disease	(ii) Zn
3. Brown heart of turnip	(iii) Cu
4. Little leaf	(iv) B

(a)

1(iii) 2 (ii) 3 (iv) 4 (i)

(b)

1 (iii) 2 (i) 3 (iv) 4 (ii)

(c)

1 (i) 2 (iii) 3 (ii) 4 (iv)

(d)

1 (iii) 2 (iv) 3 (ii) 4 (i)

38.

Stomata of a plant open due to _____.

(a)

Influx of K⁺

(b)

Efflux of K⁺

(c)

Influx of Cl^-

(d)

Influx of OH^-

39.

In a fully turgid cell _____.

(a)

DPD = 10 atm; OP = 5 atm; TP = 10 atm

(b)

DPD = 0 atm; OP = 10 atm; TP = 10 atm

(c)

DPD = 0 atm; OP = 5 atm; TP = 10 atm

(d)

DPD = 20 atm; OP = 20 atm; TP = 10 atm

40.

What is the fate of primary xylem in a dicot stem showing extensive secondary growth?

(a)

It is retained in the centre of the axis

(b)

It gets crushed

(c)

May or may not get crushed

(d)

It gets surrounded by primary phloem

41.

Consider the following statements:
In spring season vascular cambium
i. Is less active
ii. Produces a large number of xylary elements
iii. Forms vessels with wide cavities of these,

(a)

(i) is correct but (ii) and (iii) are not correct

(b)

(i) is not correct but (ii) and (iii) are correct

(c)

(i) and (ii) are correct but (iii) is not correct

(d)

(i) and (ii) are not correct but (iii) is correct.

42.

Grafting is successful in dicots but not in monocots because the dicots have _______.

(a)

Vascular bundles arranged in a ring

(b)

Cambium for secondary growth

(c)

Vessels with elements arranged end to end

(d)

Cork cambium

43.

In Gymnosperms, the activity of sieve cells are controlled by _____.

(a)

Nearby sieve tube members

(b)

Phloem parenchyma cells

(c)

Nucleus of companion cells

(d)

Nucleus of albuminous cells

44.

__________ is a mixed nerve.

(a)

Hypoglossal

(b)

Optic

(c)

Olfactory

(d)

Facial

45.

___________ is not related to inner ear.

(a)

Saccule

(b)

Utricle

(c)

Ossicle

(d)

Organ of Corti

46.

Assertion (A): The half life Period of insulin in plasma is 6 minutes.
Reason (R): It is cleared from circulation within 10-15 minutes.

(a)

A and R are wrong

(b)

A is right but R is wrong

(c)

A is right and R explains A

(d)

A is wrong R is right

47.

________________ is also known stimulating hormone.

(a)

LTH

(b)

(c)

FSH

(d)

ACTH

48.

Which of the following statement concerning the somatic division of the peripheral neural system is incorrect?

(a)

Its pathways innervate skeletal muscles

(b)

Its pathways are usually voluntary

(c)

Some of its pathways are referred to as reflex arcs

(d)

Its pathways always involve four neurons

49.

Which of the following cranial nerve controls the movement of eyeball ?

(a)

Trochlear nerve

(b)

Optic nerve

(c)

Olfactory nerve

(d)

Vagus nerve

50.

The structure which connects the hypothalamus with anterior lobe of pituitary gland is the ______.

(a)

Dendrites of neurohypophysis

(b)

Axons of neurohypophysis

(c)

Bands of white fibers from cerebellar region

(d)

Hypophyseal portal system

51.

Serum calcium level is regulated by _____.

(a)

Thyroxine

(b)

FSH

(c)

Pancreas

(d)

Thyroid and Parathyroid

52.

Say True or False.
Worker bee prepares bee-bread to feed the larvae

(a)

True

(b)

false

53.

___________ is a breed found in West Bengal.

(a)

Silkie

(b)

Chittagong

(c)

Deoni

(d)

Brahma

54.

Pivot joint is also called ______________

(a)

saddle joint

(b)

ellipsoidal joint

(c)

plane joint

(d)

swivel joint

55.

__________is a unpaired bone.

(a)

Maxilla

(b)

Palatine

(c)

Vomer

(d)

Zygomatic

56.

Inland fisheries are _____.

(a)

deep sea fishing

(b)

capturing fishes from sea coast

(c)

Raising and capturing fishes in fresh water

(d)

oil extraction from fish

57.

Match the following.

1. Bombyx mori	(i) Champa	(I) Muga
2. Antheraea assamensis	(ii) Mulberry	(II) Eri
3. Antheraea mylitta	(iii) Arjun	(III) Tassar
4. Attacus ricini	(iv) Castor	(IV) Mulberry

Select the correct one.

(a)

1 – ii – IV

(b)

2 – iii – II

(c)

3 - i - I

(d)

4 - iv - III

58.

Knee joint is an example of _____.

(a)

saddle joint

(b)

hinge joint

(c)

pivot joint

(d)

gliding joint

59.

The protein present in the thick filament is _____.

(a)

myosin

(b)

actin

(c)

pectin

(d)

leucine

60.

The ______________ lack cartilaginous rings.
(i) Trachea (ii) Bronchi (iii) Bronchioles (iv) Alveoli

(a)

(a) i and iii

(b)

ii and iii

(c)

i, ii and iii

(d)

iii and iv

61.

The major function of Henle's loop is to concentrate_____________

(a)

Na⁺ and Cl^-

(b)

K⁺ ions

(c)

Na⁺ and K⁺ ions

(d)

Na^- and CI⁺ ions

62.

____________is not a waste product.

(a)

Guanine

(b)

Creatinine

(c)

Urea

(d)

Ribose

63.

Which of the following best describes the process of gas exchange in the lungs?

(a)

Air moves in and out of the alveoli during breathing.

(b)

Carbon dioxide diffuses from deoxygenated blood in capillaries into the alveolar air.

(c)

Oxygen and carbon dioxide diffuse down their concentration gradients between blood and alveolar air.

(d)

Oxygen diffuses from alveolar air into the deoxygenated blood.

64.

CO₂ is transported through blood to lungs as _____.

(a)

carbonic acid

(b)

oxyhaemoglobin

(c)

carbamino haemoglobin

(d)

carboxy haemoglobin

65.

Podocytes are the cells present on the ______.

(a)

Outer wall of Bowman's capsule

(b)

Inner wall of Bowman's capsule

(c)

Neck of nephron

(d)

Wall of glomerular capillaries

66.

If Henle's loop were absent from mammalian nephron, which one of the following is to be expected?

(a)

There will be no urine formation

(b)

There will be hardly any change in the quality and quantity of urine formed

(c)

The urine will be more concentrated

(d)

The urine will be more dilute

67.

The sphincter of Oddi guards _____.

(a)

Hepatopancreatic duct

(b)

Common bile duct

(c)

Pancreatic duct

(d)

Cystic duct

68.

What is chyme_______ ?

(a)

The process of conversion of fat into small droplets.

(b)

The process of conversion of micelles substances of glycerol into fatty droplet.

(c)

The process of preparation of incompletely digested acidic food through gastric juice.

(d)

The process of preparation of completely digested liquid food in midgut.

69.

_________ is not found in female cockroach.

(a)

Colleterial gland

(b)

Gonapophyses

(c)

Spermathecae

(d)

Conglobate gland

70.

Erythroblastosis foetalis is due to the destruction of ______.

(a)

Foetal RBCs

(b)

Foetus suffers from atherosclerosis

(c)

Foetal WBCs

(d)

Foetus suffers from minamata

71.

Which of the following is not involved in blood clotting?

(a)

Fibrin

(b)

Calcium

(c)

Platelets

(d)

Bilirubin

72.

Presence of gills in the tadpole of frog indicates that _______.

(a)

fishes were amphibious in the past

(b)

fishes evolved from frog -like ancestors

(c)

frogs will have gills in future

(d)

frogs evolved from gilled ancestor

73.

Buccopharyngeal respiration in frog ______.

(a)

is increased when nostrils are closed

(b)

Stops when there is pulmonary respiration

(c)

is increased when it is catching fly

(d)

stops when mouth is opened.

74.

Non-shivering thermogenesis in neonates produces heat through _______.

(a)

White fat

(b)

Brown fat

(c)

Yellow fat

(d)

Colourless fat

75.

Prevention of substances from leaking across the tissue is provided by ______.

(a)

Tight junction

(b)

Adhering junction

(c)

Gap junction

(d)

Elastic junction

76.

Which of the following is a crustacean?

(a)

Prawn

(b)

Snail

(c)

Sea anemone

(d)

Hydra

77.

Which of the following animals has a true coelom?

(a)

Ascaris

(b)

Pheretima

(c)

Sycon

(d)

Taenia solium

78.

Who coined the term biodiversity?

(a)

Walter Rosen

(b)

AG Tansley

(c)

Aristotle

(d)

AP de Candole

79.

Every unit of classification regardless of its rank is _____.

(a)

Taxon

(b)

Variety

(c)

Species

(d)

Strain

80.

The seeds of __________ is viable for 20,000 years.

(a)

Date palm

(b)

Sesame

(c)

Pumpkin

(d)

Colocasia

81.

From which point of root, root hairs develop?

(a)

Region of maturation

(b)

Region of elongation

(c)

Meristematic region

(d)

Region of root cap

82.

Example for negatively geotropic roots __________

(a)

Ipomoea, Dahlia

(b)

Asparagus, Ruellia

(c)

Vitis, Portulaca

(d)

Avicennia, Rhizophora

83.

When the root is thick and fleshy, but does not taken a definite shape, it said to be _________

(a)

Nodulose root

(b)

Tuberous root

(c)

Monilliform root

(d)

Fasiculated root

84.

Aggregate fruit develops from _____.

(a)

Multicarpellary, apocarpous ovary

(b)

Multicarpellary, syncarpous ovary

(c)

Multicarpellary ovary

(d)

Whole inflorescence

85.

Vexillary aestivation is characteristic of the family _____.

(a)

Fabaceae

(b)

Asteraceae

(c)

Solanaceae

(d)

Brassicaceae

86.

The correct statement regarding Blue green algae is ______.

(a)

lack of motile structures

(b)

presence of cellulose in cell wall

(c)

absence of mucilage around the thallus

(d)

presence of floridean starch

87.

Which one of the following statement about virus is correct?

(a)

Possess their own metabolic system

(b)

They are facultative parasites

(c)

They contain DNA or RNA

(d)

Enzymes are present

88.

Proteins perform many physiological functions. For example some functions as enzymes. One of the following represents an additional function that some proteins discharge:

(a)

Antibiotics

(b)

Pigment conferring colour to skin

(c)

Pigments making colours of flowers

(d)

Hormones

89.

An example of feedback inhibition is

(a)

Cyanide action on cytochrome

(b)

Sulpha drug on folic acid synthesiser bacteria

(c)

Allosteric inhibition of hexokinase by glucose-6-phosphate

(d)

The inhibition of succinic dehydrogenase by malonate

90.

Many cells function properly and divide mitotically even though they do not have.

(a)

plasma membrane

(b)

cytoskeleton

(c)

mitochondria

(d)

plastids

91.

Sequences of which of the following is used to know the phylogeny.

(a)

mRNA

(b)

rRNA

(c)

tRNA

(d)

HnRNA

92.

The two subunits of ribosomes remain united at critical ion level of _______.

(a)

Magnesium

(b)

Calcium

(c)

Sodium

(d)

Ferrous

93.

Flowers are zygomorphic in ______.

(a)

Ceropegia

(b)

Thevetia

(c)

Datura

(d)

Solanum

94.

Perianth is present in_______.

(a)

Clitoria ternatea

(b)

Datura metel

(c)

Allium cepa

(d)

Pongamia pinnata

95.

Specimen derived from non-original collection serves as the nomenclature type, when original specimen is missing. It is known as ________ .

(a)

Holotype

(b)

Neotype

(c)

Isotype

(d)

Paratype

96.

The pairing of homologous Chromosomes on meiosis is known as _____.

(a)

Bivalent

(b)

Synapsis

(c)

Disjunction

(d)

Synergids

97.

If mitotic division is restricted in G1 phase of the cell cycle then the condition is known as _____.

(a)

S Phase

(b)

G2 Phase

(c)

M Phase

(d)

G0 Phase

98.

Fucus and Laminaria are rich in_______

(a)

Calcium

(b)

Vitamin

(c)

Nitrogen

(d)

Iodine

99.

In gymnosperm endosperm is formed_______.

(a)

At the time of fertilization

(b)

Before fertilization

(c)

After fertilization

(d)

Along with the development of embryo

100.

Which of following represents gametophytic generation in pteridophytes?

(a)

Prothallus

(b)

Thallus

(c)

Cone

(d)

Rhizophore

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Answers Key:

Multiple Choice Question

100 x 1 = 100

(b)
oxygenated, left

(d)
28%

(a)
Emphysema

(d)
Prawns

(a)
Hormone

(b)
absence of teeth

(d)
sucrase

(a)
Collagen fibres

10.

11.

12.

13.

14.

(d)
Telophase

15.

(d)
Corm

16.

(b)
Mitochondria

17.

(a)
Serotaxonomy

18.

(a)
Protoplasm

19.

(a)
Monograph

20.

(a)
Eustele

21.

(a)
Lignicolous

22.

(a)
0.1-0.5

23.

24.

25.

(a)
Panthera tigris

26.

(d)
3 fatty acids

27.

(b)
Covalent bond

28.

(b)

A B C D E F

v i ii iv vi iii

29.

30.

(a)
3 inches

31.

(d)
All of these

32.

33.

34.

(b)
PS I and PS II involved in the formation of NADPH + H⁺

35.

36.

(a)
Mn prevent the uptake of Fe, Mg but not Ca

37.

(b)
1 (iii) 2 (i) 3 (iv) 4 (ii)

38.

(a)
Influx of K⁺

39.

(b)
DPD = 0 atm; OP = 10 atm; TP = 10 atm

40.

(b)
It gets crushed

41.

(b)
(i) is not correct but (ii) and (iii) are correct

42.

(b)
Cambium for secondary growth

43.

44.

(d)
Facial

45.

46.

47.

(b)
LH

48.

(d)
Its pathways always involve four neurons

49.

(b)
Optic nerve

50.

(d)
Hypophyseal portal system

51.

(d)
Thyroid and Parathyroid

52.

(a)
True

53.

(b)
Chittagong

54.

(d)
swivel joint

55.

56.

57.

(a)
1 – ii – IV

58.

(b)
hinge joint

59.

(a)
myosin

60.

(d)
iii and iv

61.

(a)
Na⁺ and Cl^-

62.

(d)
Ribose

63.

64.

65.

(b)
Inner wall of Bowman's capsule

66.

(d)
The urine will be more dilute

67.

(a)
Hepatopancreatic duct

68.

69.

(d)
Conglobate gland

70.

(a)
Foetal RBCs

71.

(d)
Bilirubin

72.

(b)
fishes evolved from frog -like ancestors

73.

(d)
stops when mouth is opened.

74.

(b)
Brown fat

75.

(a)
Tight junction

76.

(a)
Prawn

77.

(b)
Pheretima

78.

(a)
Walter Rosen

79.

(a)
Taxon

80.

(a)
Date palm

81.

(b)
Region of elongation

82.

(d)
Avicennia, Rhizophora

83.

(b)
Tuberous root

84.

(a)
Multicarpellary, apocarpous ovary

85.

(a)
Fabaceae

86.

(a)
lack of motile structures

87.

88.

(d)
Hormones

89.

90.

(d)
plastids

91.

(b)
rRNA

92.

(a)
Magnesium

93.

(a)
Ceropegia

94.

95.

(b)
Neotype

96.

(b)
Synapsis

97.

(d)
G0 Phase

98.

(d)
Iodine

99.

(b)
Before fertilization

100.

(a)
Prothallus

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