11th Public Exam March 2019 Important Creative One Mark Test 1

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

The wall of which part of the heart is very thick?

(a)

Left atrium

(b)

Left ventricle

(c)

Right atrium

(d)

Right ventricle

Cerebral infarction is called __________.

(a)

heart attack

(b)

hypertension

(c)

heart failure

(d)

stroke

Which of the following is not an insect?

(a)

Cockroach

(b)

Spider

(c)

Mosquito

(d)

bedbug

Parthenogenesis can be seen in ____________

(a)

frog

(b)

honey bee

(c)

moth

(d)

all of these

Which of the following options best represents the enzyme composition of pancreatic juice ____________

(a)

Amylase, pepsin, trypsinogen, maltase

(b)

Peptidase, Amylase, pepsine, renine

(c)

Lipase, amylase, trypsinogen, procarboxypeptidase

(d)

Amylase peptidase, trypsinogen, rennin

HCl is secreted by ____________

(a)

Zymogen cells

(b)

Kupffer's cells

(c)

Oxyntic cells

(d)

Mucous cells

Which of the following is caused by bacteria ___________

(a)

pneumonia

(b)

emphysema

(c)

silicosis

(d)

tuberculosis

The lungs are protected ventrally by _____________

(a)

vertebral column

(b)

sternum

(c)

ribs

(d)

diaphragm

The secretion of colleterial glands in cockroach is to produce __________

(a)

ova

(b)

sperms

(c)

pigments

(d)

oothoea

10.

Which of the following is right?

(a)

Anal styles are present only in male cockroach.

(b)

Anal styles are present in both male and female cockroaches

(c)

Anal cerei are present in male cockroach only

(d)

Anal cerei are present in female cockroach only

11.

Groups of cells that are similar in structure and perform a common function are called ________

(a)

tissues

(b)

organs

(c)

cells

(d)

organ systems

12.

Which among the following is NOT an exception to cell theory?

(a)

Viruses

(b)

Viroids

(c)

Prions

(d)

Fungi

13.

Study of fungus is called as __________ .

(a)

phycology

(b)

mycology

(c)

algology

(d)

biology

14.

Recombination of homologous chromosomes is completed by the end of the stage ___________ .

(a)

Leptotene

(b)

Zygotene

(c)

Pachytene

(d)

Diplotene

15.

_____________ occurs in shoot and root tips and other meristematic tissues of plants.

(a)

Amitosis

(b)

Mitosis

(c)

Closed Mitosis

(d)

Open Mitosis

16.

_____________ include simple sugars.

(a)

ribosomal RNA

(b)

Carbohydrates

(c)

Lipids

(d)

Nucleic acids

17.

_____________ help to increase the rate of reaction catalysed by enzymes.

(a)

Holoenzyme

(b)

Apoenzyme

(c)

Inorganic ions

(d)

Coenzymes

18.

They develop from mullcarpellary, syncarpous, superior ovary with hard ____________.

(a)

Achene

(b)

Cypsela

(c)

Caryopsis

(d)

Nut

19.

A disk-shaped stigma is called _____________.

(a)

Lateral style

(b)

Discoid

(c)

capitate

(d)

Globose

20.

Plants with united petals, which are either partially or completely fused in ________.

(a)

Dicotyledonae

(b)

Polypetalae

(c)

Gamopetalae

(d)

Monochlamydeae

21.

_________outlined an artificial system of classification.

(a)

Father of Taxonomy

(b)

Carolus Linnaeus

(c)

Artificial system of classification

(d)

Natural system of classification

22.

Which one is used as bio - fertilizer?

(a)

Funaria

(b)

Marchantia

(c)

Azolla

(d)

Anthoceros

23.

Plants grow on land is called ________.

(a)

Aquatic

(b)

Amphibian

(c)

Terrestrial

(d)

Both a & b

24.

State whether the statement is true or false
To sustain themselves, earthworms must guide their way through the soil using their powerful muscles. They gather nutrients by ingesting organic matter and soil, absorbing what they need into their bodies.The two ends of the earthworm can equally ingest soil.

(a)

True

(b)

False

25.

Who is known as the Father of gastric physiology?

(a)

Aristotle

(b)

William Beaumont

(c)

Alexis

(d)

A.C Guyton and Hall

26.

The father of modem taxonomy is _________

(a)

John Ray

(b)

Huxley

(c)

Darwin

(d)

Carolus Linnaeus

27.

Which of the following is a living fossil?

(a)

Spirogyra

(b)

Moss

(c)

Cycas

(d)

Saccharomyces

28.

Seed dormancy allows the plants to

(a)

overcome unfavourable climatic conditions

(b)

develop healthy seeds

(c)

reduce viability

(d)

prevent deterioration of seeds

29.

________ is the powerful growth inhibitor

(a)

Ethanol

(b)

Cytokinins

(c)

ABA

(d)

Auxin

30.

Select the wrong statement from the following:

(a)

Formative phase of the cells retain the capability of cell division.

(b)

In elongation phase development of central vacuole takes place.

(c)

In maturation phase thickening and differentiation takes place.

(d)

In maturation phase, the cells grow further.

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.

Assertion (A): Oxidative phosphorylation takes place during the electron transport chain in mitochondria.
Reason (R): Succinyl CoA is phosphorylated into succinic acid by substrate phosphorylation.

(a)

A and R is correct. R is correct explanation of A

(b)

A and R is correct but R is not the correct explanation of A

(c)

A is correct but R is wrong

(d)

A and R is wrong.

33.

During oxidation of two molecules of cytosolic NADH + H⁺, number of ATP molecules produced in plants are _____.

(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.

For every CO₂ molecule entering the C₃ cycle, the number of ATP & NADPH required ________.

(a)

2ATP + 2NADPH

(b)

2ATP + 3NADPH

(c)

3ATP + 2NADPH

(d)

3ATP + 3NADPH

36.

The element which is not remobilized?

(a)

Phosphorous

(b)

Potassium

(c)

Calcium

(d)

Nitrogen

37.

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

38.

What type of transpiration is possible in the xerophyte Opuntia?

(a)

Stomatal

(b)

Lenticular

(c)

Cuticular

(d)

All the above

39.

Which among the following is correct?
i. Apoplast is fastest and operate in nonliving part.
ii. Transmembrane route includes vacuole.
iii. Symplast interconnect the nearby cell through plasmadesmata.
iv. Symplast and transmembrane route are in living part of the cell

(a)

i and ii

(b)

ii and iii

(c)

iii and iv

(d)

i, ii, iii, iv

40.

The common bottle cork is a product of______.

(a)

Phellem

(b)

Phellogen

(c)

Xylem

(d)

Vascular cambium

41.

Usually, the monocotyledons do not increase their girth, because ____.

(a)

They possess actively dividing cambium

(b)

They do not possess actively dividing cambium

(c)

Ceases activity of cambium

(d)

All are correct

42.

When a leaf trace extends from a vascular bundle in a dicot stem, what would be the arrangement of vascular tissues in the veins of the leaf?

(a)

Xylem would be on top and the phloem on the bottom

(b)

Phloem would be on top and the xylem on the bottom

(c)

Xylem would encircle the phloem

(d)

Phloem would encircle the xylem

43.

Read the following sentences and identify the correctly matched sentences.
i. In exarch condition, the protoxylem lies outside of metaxylem.
ii. In endarch condition, the protoxylem lie towards the centre.
iii. In centarch condition, metaxylem lies in the middle of the protoxylem.
iv. In mesarch condition, protoxylem lies in the middle of the metaxylem.

(a)

i, ii and iii only

(b)

ii, iii and iv only

(c)

i, ii and iv only

(d)

All of these

44.

The functioning of _____________ glands regulates serum calcium levels.

(a)

Thyroid

(b)

Pituitary

(c)

Thymus

(d)

Parathyroid

45.

Match and identify the wrong pair

Column I	Column II
1. Cushing's Syndrome	Cortisol
2. Addison's disease	Adrenal cortex
3. Acromegaly	TSH
4. Gigantism	GH

(a)

1 and 3

(b)

2 only

(c)

1 and 4

(d)

3 only

46.

___________ are egg shaped receptors seen in the skin.

(a)

Meissner's corpuscles

(b)

Ruffini endings

(c)

Pacinian corpuscles

(d)

Hair follicle receptors

47.

Assertion (A): The inner ear acts as an organ of balance.
Reason (R): It contains the ear ossicles.

(a)

A and R are wrong

(b)

R explains A

(c)

A and R are right but R does not explain A

(d)

A is right, R is wrong

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.

The respiratory centre is present in the _______.

(a)

Medulla oblongata

(b)

Hypothalamus

(c)

Cerebellum

(d)

Thalamus

50.

Which of the following hormone is not secreted under the influence of pituitary gland?

(a)

Thyroxine

(b)

Insulin

(c)

Oestrogen

(d)

Glucocorticoids

51.

Which of the following are exclusive endocrine glands?

(a)

Thymus and Testis

(b)

Adrenal and Ovary

(c)

Parathyroid and Adrenal

(d)

Pancreas and Parathyroid

52.

In fish breeding, induced breeding involves removal of ____________________

(a)

Pituitary gland

(b)

Thymus-gland

(c)

Pineal gland

(d)

Thyroid gland

53.

There are _________ well defined breeds of cattle

(a)

(b)

(c)

(d)

54.

Choose the structure made of 8 bones

(a)

Cervical region of vertebral column

(b)

Tarsal

(c)

Cranium

(d)

Metacarpals

55.

The vertebrae which get reduced in an adult are_____________
(i) Cervical (ii) Coccyx (iii) Sacral (iv) Thoracic

(a)

(i) and (ii)

(b)

(ii) and (iii)

(c)

(ii) and (iv)

(d)

(i) and (iv)

56.

Isinglass is used in _____.

(a)

Preparation

(b)

Clearing of wines

(c)

Distillation of wines

(d)

Preservation of wines

57.

Which of the statement regarding Lac insect is TRUE?

(a)

A microscopic, resinous crawling scale insect

(b)

Inserts its proboscis into plant tissue suck juices and grows

(c)

Secretes lac from the hind end of body.

(d)

The male lac insect is responsible for large scale production of lac.

58.

Appendicular skeleton is ______.

(a)

girdles and their limbs

(b)

vertebrae

(c)

skull and vertebral column

(d)

ribs and sternum

59.

Synovial fluid is found in _____.

(a)

Ventricles of the brain

(b)

Spinal cord

(c)

Immovable joint

(d)

Freely movable joints

60.

Assertion (A): The descending limb of Henle's loop is permeable to water.
Reason (R): Aquaporins are the facilitators for water permeability.

(a)

A and R are wrong

(b)

R does not explain A

(c)

R explains A

(d)

A is right R is wrong

61.

____________is not a waste product.

(a)

Guanine

(b)

Creatinine

(c)

Urea

(d)

Ribose

62.

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.

63.

Asthma is caused due to _____.

(a)

Inflammation of bronchus and bronchioles

(b)

Inflammation of bronchiole

(c)

Damage of diaphragm

(d)

Infection of lungs

64.

The hormone which helps in the reabsorption of water in kidney tubules is _____.

(a)

cholecystokinin

(b)

angiotensin II

(c)

antidiuretic hormone

(d)

Pancreozymin

65.

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

66.

Which of the following is not the function of liver?

(a)

Production of insulin

(b)

Detoxification

(c)

Storage of glycogen

(d)

Production of bile

67.

The sphincter of Oddi guards _____.

(a)

Hepatopancreatic duct

(b)

Common bile duct

(c)

Pancreatic duct

(d)

Cystic duct

68.

A patient's chart reveals that he has a cardiac output of 7500mL per minute and a stroke volume of 50 mL. What is his pulse rate (in beats/min)?

(a)

(b)

100

(c)

150

(d)

400

69.

Which one of the following plasma proteins is involved in the coagulation of blood?

(a)

Globulin

(b)

Fibrinogen

(c)

Albumin

(d)

Serum amylase

70.

Kidney of frog is _____.

(a)

Archinephros

(b)

Pronephros

(c)

Mesonephros

(d)

Metanephros

71.

Pick out the odd one:

(a)

Mucus

(b)

Saliva

(c)

Hormone

(d)

Milk

72.

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

(a)

Tight junction

(b)

Adhering junction

(c)

Gap junction

(d)

Elastic junction

73.

The main function of the cuboidal epithelium is ______.

(a)

Protection

(b)

Secretion

(c)

Absorption

(d)

Both (b) and (c)

74.

Which of the following is an egg laying mammal?

(a)

Delphinus

(b)

Macropus

(c)

Ornithorhynchus

(d)

Equus

75.

Metameric segmentation is the main feature of ______.

(a)

Annelida

(b)

Echinodermata

(c)

Arthropoda

(d)

Coelenterata

76.

____________is the father of modern taxonomy and founder of systematics.

(a)

Linnaeus

(b)

Aristotle

(c)

John Ray

(d)

Bauhin

77.

Every unit of classification regardless of its rank is _____.

(a)

Taxon

(b)

Variety

(c)

Species

(d)

Strain

78.

A group of organisms having similar traits of a rank is _______.

(a)

Species

(b)

Taxon

(c)

Genus

(d)

Family

79.

Match

1	Radical buds	i	Agave
2	Foliar bud	ii	Millingtonia
3	Cauline bud	iii	Begonia
		iv	Solanum

(a)

1 - iii, 2 - iv, 3 - i

(b)

1 - iii, 2 - i, 3 - ii

(c)

1 - ii, 2 - i, 3 - iv

(d)

1 - ii, 2 - iii, 3 - i

80.

The base plate of T₄ phage has ______________ tail fibres.

(a)

(b)

(c)

(d)

81.

Bentham and Hooker described ........... species.

(a)

90,205

(b)

97,305

(c)

98,304

(d)

97,205

82.

Nucleosome contains______ histone subunits

(a)

(b)

(c)

(d)

83.

Bryophyllum and Dioscorea are example for ______.

(a)

Foliar bud, apical bud

(b)

Foliar bud, cauline bud

(c)

Cauline bud, apical bud

(d)

Cauline bud, foliar bud

84.

Roots are ______.

(a)

Descending, negatively geotrophic, positively phototropic

(b)

Descending, positively geotrophic, negatively phototrophic

(c)

Ascending, positively geotrophic, negatively phototrophic

(d)

Ascending, negatively geotrophic, positively phototrophic

85.

Gynoecium with united carpels is termed as ______.

(a)

Apocarpous

(b)

Multicarpellary

(c)

Syncarpous

(d)

None of the above

86.

Vexillary aestivation is characteristic of the family _____.

(a)

Fabaceae

(b)

Asteraceae

(c)

Solanaceae

(d)

Brassicaceae

87.

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

88.

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

89.

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

90.

The most basic amino acid is

(a)

Arginine

(b)

Histidine

(c)

Glycine

(d)

Glutamine

91.

Match the columns and identify the correct option:

	Column I		Column II
A	Thylakoids	1.	Disc-shaped sacs in Golgi apparatus
B.	Cristae	2.	Condensed structure of DNA
C.	Cisternae	3.	Flat membranous sacs in stroma
D	Chromatin	4.	Infoldings in mitochondria

(a)

A	B	C	D
(iii)	(iv)	(ii)	(i)

(b)

A	B	C	D
(iv)	(iii)	(i)	(ii)

(c)

A	B	C	D
(iii)	(iv)	(i)	(ii)

(d)

A	B	C	D
(iii)	(i)	(iv)	(ii)

92.

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

(a)

plasma membrane

(b)

cytoskeleton

(c)

mitochondria

(d)

plastids

93.

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

(a)

Magnesium

(b)

Calcium

(c)

Sodium

(d)

Ferrous

94.

The taxonomy which involves the similarities & dissimilarities among the immune system of different taxa is termed as ______.

(a)

Chemotaxonomy

(b)

Molecular systematics

(c)

Serotaxonomy

(d)

Numerical taxonomy

95.

Phylogenetic classification is the most favoured classification because it reflects _______.

(a)

Comparative Anatomy

(b)

Number of flowers produced

(c)

Comparative cytology

(d)

Evolutionary relationships

96.

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

97.

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

(a)

Bivalent

(b)

Synapsis

(c)

Disjunction

(d)

Synergids

98.

Colchicine prevents the mitosis of the cells at which of the following stage ______.

(a)

Anaphase

(b)

Metaphase

(c)

Prophase

(d)

Interphase

99.

The haploid number of chromosome for an Angiosperm is 14, the number of chromosome in its endosperm would be

(a)

(b)

(c)

(d)

100.

Which of the plant group has gametophyte as a dominant phase?

(a)

Pteridophytes

(b)

Bryophytes

(c)

Gymnosperms

(d)

Angiosperms

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Answers Key:

Multiple Choice Question

100 x 1 = 100

(b)
Left ventricle

(d)
stroke

(b)
Spider

(b)
honey bee

(d)
tuberculosis

(b)
sternum

(d)
oothoea

10.

11.

(a)
tissues

12.

(d)
Fungi

13.

(b)
mycology

14.

15.

(b)
Mitosis

16.

(b)
Carbohydrates

17.

18.

(a)
Achene

19.

(b)
Discoid

20.

21.

(b)
Carolus Linnaeus

22.

23.

24.

(b)
False

25.

(b)
William Beaumont

26.

(d)
Carolus Linnaeus

27.

28.

(a)
overcome unfavourable climatic conditions

29.

30.

(d)
In maturation phase, the cells grow further.

31.

(d)
All of these

32.

(b)
A and R is correct but R is not the correct explanation of A

33.

(b)
4

34.

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

35.

36.

37.

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

38.

39.

(d)
i, ii, iii, iv

40.

(b)
Phellogen

41.

(b)
They do not possess actively dividing cambium

42.

(a)
Xylem would be on top and the phloem on the bottom

43.

44.

(d)
Parathyroid

45.

(d)
3 only

46.

47.

(d)
A is right, R is wrong

48.

(d)
Its pathways always involve four neurons

49.

(a)
Medulla oblongata

50.

(b)
Insulin

51.

52.

(a)
Pituitary gland

53.

(b)
26

54.

55.

(b)
(ii) and (iii)

56.

(b)
Clearing of wines

57.

(d)
The male lac insect is responsible for large scale production of lac.

58.

(a)
girdles and their limbs

59.

(d)
Freely movable joints

60.

61.

(d)
Ribose

62.

63.

(a)
Inflammation of bronchus and bronchioles

64.

65.

(d)
The urine will be more dilute

66.

(a)
Production of insulin

67.

(a)
Hepatopancreatic duct

68.

69.

(b)
Fibrinogen

70.

71.

72.

(a)
Tight junction

73.

(d)
Both (b) and (c)

74.

75.

(a)
Annelida

76.

(a)
Linnaeus

77.

(a)
Taxon

78.

(a)
Species

79.

(d)
1 - ii, 2 - iii, 3 - i

80.

81.

(d)
97,205

82.

(b)
8

83.

(b)
Foliar bud, cauline bud

84.

(b)
Descending, positively geotrophic, negatively phototrophic

85.

86.

(a)
Fabaceae

87.

(a)
lack of motile structures

88.

89.

(d)
Hormones

90.

(a)
Arginine

91.

92.

(d)
plastids

93.

(a)
Magnesium

94.

95.

(d)
Evolutionary relationships

96.

(b)
Neotype

97.

(b)
Synapsis

98.

(b)
Metaphase

99.

100.

(b)
Bryophytes

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