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sslc_science-biology_em

Total questions: 172

Worksheet time: 1hrs 26mins

Name
Class
Date
1.

Casparian strips are present in the ..... of the root

a)

cortes

b)

pith

c)

pericycle

d)

endodermis

2.

The endarch condition is the characteristic feature of

a)

root

b)

stem

c)

leaves

d)

flower

3.

The xylem and phloem arranged side by side on same radius is called _________

a)

radial

b)

amphivasal

c)

conjoint

d)

none of these

4.

Which is formed during anaerobic respiration

a)

carbohydrate

b)

ethyl alcohol

c)

acetyl CoA

d)

Pyruvate

5.

Kreb's cycle takes place in

a)

chloroplast

b)

mitochondrial matrix

c)

stomata

d)

inner mitochondrial membrane

6.

oxygen is produced at what point during photosynthesis?

a)

when ATP is converted to ADP

b)

when CO2 is fixed

c)

when H2O is splitted

d)

All of these

7.

Cortex lies between ....

a)

Epiblema and Endodermis

b)

cytoplasm and conjoint

8.

Xylem and phloem occurring on the same radius constitute a vascular bundle called ____________.

a)

cytoplasm

b)

Conjoint bundle

c)

endodermis

d)

all of these

9.

Glycolysis takes place in ......

a)

conjoint

b)

endodermis

c)

cyroplasm

d)

stem

10.

The source of O2 liberated in photosynthesis is ....... 

a)

H20

b)

CO2

c)

Sun light

d)

All of these

11.

...... is ATP factory of the cells.

a)

Xylem

b)

Mitochandria

c)

Nucleus

d)

Cytoplasm

12.

In leech locomotion is performed by

a)

Anterior sucker

b)

Posterior sucker

c)

Setae

d)

None of the above

13.

The segments of leech are known as ....

a)

Metameres (somites)

b)

proglottids

c)

Strobila

d)

all the above

14.

Pharyngeal ganglion in leech is part of

a)

Excretory system

b)

Nervous system

c)

Reproductive system

d)

Respiratory System

15.

The brain of leech lies above ...

a)

Mouth

b)

Buccal cavity

c)

Pharynx

d)

Crop

16.

The body of leech has

a)

23 segments

b)

33 segments

c)

38 segments

d)

30 segments

17.

Mammals are ....... animals

a)

cold blooded

b)

warm blooded

c)

poikilothermic

d)

all the above

18.

The animals which give birth to young ones are

a)

Oviparous

b)

Viviparous

c)

Ovoviviparous

d)

All the above

19.

The posterior sucker is formed by the fusion of the ..... segments.

a)

last seven

b)

last eight

c)

last six

d)

last five

20.

The existence of two sets of teeth in the life of an animal is called .... dentition

a)

monophyodont

b)

diphyodont

21.

The anterior end of leech has a lobe-like structure called .....

a)

posterior sucker

b)

anterior sucker

22.

The blood sucking habit of leech is known as ....

a)

nictitating

b)

sanguivorous

23.

.......... separate nitrogenous waste from the blood in rabbit.

a)

kidney

b)

brain

24.

........... spinal nerves are present in rabbit.

a)

37 pairs

b)

36 pairs

25.

Active transport involves ........

a)

movement of molecules from lower to higher concentration

b)

expenditure of energy

c)

it is an uphill task

d)

all of the above

26.

Water which is absorbed by roots is transported to aerial parts of the plant through

a)

cortex

b)

epidermis

c)

phloem

d)

xylem

27.

During transpiration there is loss of ........

a)

carbon di oxide

b)

oxygen

c)

water

d)

none of the above

28.

Root hairs are

a)

cortical cell

b)

projection of epidermal cell

c)

unicellular

d)

both b and c

29.

Which of the following process requires energy?

a)

active transport

b)

diffusion

c)

osmosis

d)

all of them

30.

The wall of human heart is made of

a)

Endocardium

b)

Epicardium

c)

Myocardium

d)

All of the above

31.

Which is the sequence of correct blood flow

a)

ventricle - atrium - vein - arteries

b)

atrium - ventricle - veins - arteries

c)

atrium - ventricle - arteries - vein

d)

ventricles - vein - atrium - arteries

32.

A patient with blood group O was injured in an accident and has blood loss. Which blood group the doctor should effectively use for transfusion in this condition?

a)

O group

b)

AB group

c)

A or B group

d)

all blood group

33.

Heart of heart is called

a)

SA node

b)

AV node

c)

Purkinje fibres

d)

Bundle of His

34.

Which one of the following regarding blood composition is correct

a)

Plasma - Blood + Lymphocyte

b)

Serum - Blood + Fibrinogen

c)

Lymph - Plasma + RBC + WBC

d)

Blood - Plasma + RBC+ WBC +Platelets

35.

.......... involves evaporate loss of water from aerial parts.

a)

Transpiration

b)

evaporation

36.

Water enters the root cell through a .......... plasma membrane.

a)

permeable

b)

semi permeable

37.

Structures in roots that help to absorb water are .....

a)

root hairs

b)

xylem

c)

phloem

38.

Normal blood pressure is .....

a)

120 mm/80 mm Hg

b)

140 mm/80 mm Hg

c)

140 mm/120 mm Hg

39.

The normal human heartbeat rate is about ... time per minute

a)

72-85

b)

72-75

c)

80-85

40.

Bipolar neurons are found in

a)

retina of the eye

b)

cerebral cortex

c)

enbryo

d)

respiratory epithelium

41.

Site for processing of vision, hearing ,memory,speech,intelligence and thought is

a)

kidney

b)

ear

c)

brain

d)

lungs

42.

In reflex action the reflex arc is formed by

a)

brain, spinal cord, muscle

b)

receptor, muscle, spinal cord

c)

muscle, receptor, brain

d)

receptor, spinal cord, muscle

43.

Dendrites transmit impulse......... cell body and axon transmit impulse......... cell body.

a)

away from, away from

b)

towards, away from

c)

towards,towards

d)

away from, towards

44.

The outer most of the three cranial meninges is

a)

arachnoid membrane

b)

piamater

c)

duramater

d)

myelin sheath

45.

There are.......... pairs of cranial nerves and ............ pairs of spinal nerves.

a)

12,31

b)

31,12

c)

12,13

d)

12,21

46.

The neurons which carries impulse from the central nervous system to the muscle fibre.

a)

afferent neurons

b)

association neuron

c)

efferent neuron

d)

unipolar neuron

47.

Which nervous band connects the two cerebral hemispheres of brain?

a)

thalamus

b)

hypothalamus

c)

corpus callosum

d)

pons

48.

Node of Ranvier is found in

a)

muscles

b)

axons

c)

cerebrum

d)

hpothalamus

49.

Vomiting centre is located in

a)

medulla oblongata

b)

stomach

c)

cerebrum

d)

hypothalamus

50.

Nerve cells do not possess

a)

neurilemma

b)

sarcolemma

c)

axon

d)

axon

51.

A person who met with an accident lost control of body temperature, water balance, and hunger. Which of the

following part of brain is supposed to be damaged?

a)

Medulla oblongata

b)

cerebrum

c)

pons

d)

hypothalamus

52.

(a)   is the longest cell in our body.

53.

Impulses travels rapidly in (a)   neurons

54.

A change in the environment that causes an animal to react is called (a)  

55.

(a)   carries the impulse towards the cell body

56.

The two antagonistic component of autonomic nervous system are ........and..............

(a)  

57.

A neuron contains all cell organelles except (a)  

58.

(a)   maintains the constant pressure inside the cranium

59.

......... and ......... increases the surface area of cerebrum.

(a)  

60.

The part of human brain which acts as relay center is (a)  

61.

Gibberellins cause

a)

Shortening of genetically tall plants

b)

Elongation of dwarf plants

c)

Promotion of rooting

d)

Yellowing of young leaves

62.

The hormone which has positive effect on apical dominance is:

a)

Cytokinin

b)

Auxin

c)

Gibberellin

d)

Ethylene

63.

Which one of the following hormones is naturally not found in plants

a)

2, 4-D

b)

GA3

c)

Gibberellin

d)

IAA

64.

Avena coleoptile test was conducted by

a)

Darwin

b)

N. Smit

c)

Paal

d)

F.W. Went

65.

To increase the sugar production in sugarcanes they are sprayed with _______

a)

Auxin

b)

Cytokinin

c)

Gibberellins

d)

Gibberellins

66.

LH is secreted by

a)

Adrenal gland

b)

Thyroid gland

c)

Anterior pituitary

d)

Hypothalamus.

67.

Identify the exocrine gland

a)

Pituitary gland

b)

Adrenal gland

c)

Salivary gland

68.

Which organ acts as both exocrine gland as well as endocrine gland

a)

Pancreas

b)

Kidney

c)

Liver

d)

Lungs

69.

Which one is referred as “Master Gland”?

a)

pineal gland

b)

Pituitary gland

c)

Thyroid gland

d)

Adrenal gland

70.

(a)   causes cell elongation, apical dominance and prevents abscission

71.

(a)   is a gaseous hormone involved in abscission of organs and acceleration of fruit ripening.

72.

(a)   causes stomatal closure

73.

Gibberellins induce stem elongation in (a)   plants.

74.

The hormone which has negative effect on apical dominance is (a)   .

75.

Calcium metabolism of the body is controlled by (a)   .

76.

In the islets of Langerhans, beta cells secrete (a)   .

77.

The growth and functions of thyroid gland is controlled by (a)   .

78.

Decreased secretion of thyroid hormones in the children leads to (a)   .

79.

The plant which propagates with the help of its leaves is ___________

a)

onion

b)

Neem

c)

Ginger

d)

Bryophyllum

80.

Asexual reproduction takes place through budding in ___________

a)

Amoeba

b)

Yeast

c)

Plasmodium

d)

Bacteria

81.

Syngamy results in the formation of _________

a)

Zoospores

b)

Conidia

c)

Zygote

d)

Chlamydospores

82.

The essential parts of a flower are ___________

a)

Calyx and Corolla

b)

Calyx and Androecium

c)

Corolla and Gynoecium

d)

Androecium and Gynoecium

83.

Anemophilous flowers have __________

a)

Sessile stigma

b)

Small smooth stigma

c)

Colored flower

d)

Large feathery stigma

84.

Male gametes in angiosperms are formed by the division of ___________

a)

Generative cell

b)

Vegetative cell

c)

Microspore mother cell

d)

Microspore

85.

What is true of gametes?

a)

They are diploid

b)

They give rise to gonads

c)

They produce hormones

d)

They are formed from gonads

86.

A single highly coiled tube where sperms are stored, get concentrated and mature is known as

a)

Epididymis

b)

Vasa efferentia

c)

Vas deferens

d)

Seminiferous tubules

87.

The large elongated cells that provide nutrition to developing sperms are

a)

Primary germ cells

b)

Sertoli cells

c)

Leydig cells

d)

Spermatogonia

88.

Estrogen is secreted by

a)

Anterior pituitary

b)

Anterior pituitary

c)

Graffian follicle

d)

Corpus luteum

89.

Which one of the following is an IUCD?

a)

Copper – T

b)

Oral pills

c)

Diaphragm

d)

Tubectomy

90.

The embryo sac in a typical dicot at the time of fertilization is (a)  

91.

After fertilization the ovary develops into (a)  

92.

Planaria reproduces asexually by (a)  

93.

Fertilization is (a)   in humans

94.

The implantation of the embryo occurs at about (a)   day of fertilization

95.

(a)   is the first secretion from the mammary gland after child birth

96.

Prolactin is a hormone produced by (a)  

97.

According to Mendel alleles have the following character

a)

pair of genes

b)

responsible for character

c)

production of gametes

d)

Recessive factors

98.

9 : 3 : 3 : 1 ratio is due to

a)

Segregation

b)

Crossing over

c)

Independent assortment

d)

Recessiveness

99.

The region of the chromosome where the spindle fibres get attached during cell division

a)

Chromomere

b)

Centrosome

c)

Centromere

d)

Chromonema

100.

The centromere is found at the centre of the ________________ chromosome

a)

Telocentric

b)

Metacentric

c)

Sub-metacentric

d)

Acrocentric

101.

The _____________ units form the backbone of the DNA

a)

5 carbon sugar

b)

Phosphate

c)

Nitrogenous bases

d)

Sugar phosphate

102.

Okasaki fragments are joined together by ___________________.

a)

Helicase

b)

DNA polymerase

c)

RNA primer

d)

DNA ligase

103.

The number of chromosomes found in human beings are __________________.

a)

22 pairs of autosomes and 1 pair of allosomes.

b)

22 autosomes and 1 allosome

c)

46 autosomes

d)

46 pairs autosomes and 1 pair of

allosomes

104.

The loss of one or more chromosome in a ploidy is called ___________.

a)

Tetraploidy

b)

Aneuploidy

c)

Euploidy

d)

polyploidy

105.

The pairs of contrasting character (traits) of Mendel are called (a)   .

106.

Physical expression of a gene is called (a)  

107.

The thin thread like structures found in the nucleus of each cell are called (a)   .

108.

DNA consists of two (a)   chains

109.

An inheritable change in the amount or the structure of a gene or a chromosome is called (a)   .

110.

Which method of crop improvement can be practised by a farmer if he is inexperienced?

a)

clonal selection

b)

mass selection

c)

pureline

d)

hybridisation

111.

Pusa Komal is a disease resistant variety of _________.

a)

sugarcane

b)

rice

c)

cow pea

d)

maize

112.

Himgiri developed by hybridisation and selection for disease resistance against rust pathogens is a variety of __________.

a)

chilli

b)

maize

c)

sugarcane

d)

wheat

113.

The miracle rice which saved millions of lives and celebrated its 50th birthday is ______

a)

IR 8

b)

IR 24

c)

Atomita

d)

Ponni

114.

Which of the following is used to produce products useful to humans by biotechnology techniques?

a)

enzyme from organism

b)

live organism

c)

vitamins

d)

both (a) and (b)

115.

We can cut the DNA with the help of

a)

scissors

b)

restriction endonucleases

c)

knife

d)

RNAase

116.

rDNA is a

a)

vector DNA

b)

circular DNA

c)

recombinant of vector DNA and

desired DNA

d)

satellite DNA

117.

DNA fingerprinting is based on the principle of identifying --------------- sequences of DNA

a)

single stranded

b)

mutated

c)

polymorphic

d)

repetitive

118.

Organisms with modified endogenous gene or a foregin gene are also known as

a)

transgenic organsims

b)

genetically modified

c)

mutated

d)

both a and b

119.

In a hexaploid wheat( 2n = 6 x = 42 ) the haploid (n) and the basic(x) number of chromosomes respectively are

a)

n = 7 and x = 21

b)

n = 21 and x = 21

c)

n = 7 and x = 7

d)

n = 21 and x = 7

120.

Economically important crop plants with superior quality are raised by (a)   .

121.

A protein rich wheat variety is (a)   .

122.

(a)   is the chemical used for doubling the chromosomes.

123.

The scientific process which produces crop plants enriched with desirable nutrients is called (a)   .

124.

Rice normally grows well in alluvial soil, but (a)   is a rice variety produced by mutation breeding that grows well in saline soil.

125.

(a)   technique made it possible to genetically engineer living organism

126.

Restriction endonucleases cut the DNA molecule at specific positions known as (a)   .

127.

Similar DNA fingerprinting is obtained for (a)   .

128.

(a)   cells are undifferentiated mass of cells.

129.

In gene cloning the DNA of interest is integrated in a (a)   .

130.

Tobacco consumption is known to stimulate secretion of adrenaline. The component causing this could be

a)

Nicotine

b)

Tannic acid

c)

Curcumin

d)

Leptin

131.

World 'No Tobacco Day' is observed on

a)

May 31

b)

June 6

c)

April 22

d)

October 2

132.

Cancer cells are more easily damaged by radiations than normal cells because they are

a)

Different in structure

b)

Non-dividing

c)

Mutated Cells

d)

Undergoing rapid division

133.

Which type of cancer affects lymph nodes and spleen?

a)

Carcinoma

b)

Carcinoma

c)

Leukemia

d)

Lymphoma

134.

Excessive consumption of alcohol leads to

a)

Loss of memory

b)

Cirrhosis of liver

c)

State of hallucination

d)

Supression of brain function

135.

Coronary heart disease is due to

a)

Streptococci bacteria

b)

Inflammation of pericardium

c)

Weakening of heart valves

d)

Insufficient blood supply to heart muscles

136.

Cancer of the epithelial cells is called

a)

Leukemia

b)

Sarcoma

c)

Carcinoma

d)

Lipoma

137.

Metastasis is associated with

a)

Malignant tumour

b)

Benign tumour

c)

Both (a) and (b)

d)

Crown gall tumour

138.

Polyphagia is a condition seen in

a)

Obesity

b)

Diabetes mellitus

c)

Diabetes insipidus

d)

AIDS

139.

Where does alcohol effect immediately after drinking?

a)

Eyes

b)

Auditory region

c)

Liver

d)

Central nervous system

140.

Cirrhosis is caused in liver due to excessive use of (a)  

141.

A highly poisonous chemicals derived from tobacco is (a)  

142.

Blood cancer is called (a)   .

143.

Less response of a drug to a specific dose with repeated use is called (a)  

144.

Insulin resistance is a condition in (a)   diabetes mellitus

145.

Which of the following is / are a fossil fuel?

i. Tar ii. Coal iii. Petroleum

a)

i only

b)

i and ii

c)

ii and iii

d)

i, ii and iii

146.

What are the steps will you adopt for better waste management?

a)

reduce the amount of waste formed

b)

reuse the waste

c)

recycle the waste

d)

all of the above

147.

The gas released from vehicles exhaust are

i. carbon monoxide

ii. Sulphur dioxide

iii. Oxides of nitrogen

a)

i and ii

b)

i and iii

c)

ii and iii

d)

i, ii and iii

148.

Soil erosion can be prevented by

a)

deforestation

b)

afforestion

c)

over growing

d)

removal of vegetation

149.

A renewable source of energy is

a)

petroleum

b)

coal

c)

nuclear fuel

d)

trees

150.

Soil erosion is more where there is

a)

no rain fall

b)

low rainfall

c)

rain fall is high

d)

none of these

151.

An inexhaustible resources is

a)

wind power

b)

soil fertility

c)

wild life

d)

all of the above

152.

Common energy source in village is

a)

electricity

b)

coal

c)

biogas

d)

wood and animal dung

153.

Green house effect refers to

a)

cooling of earth

b)

trapping of UV rays

c)

cultivation of plants

d)

warming of earth

154.

A cheap, conventional, commercial indinexhaustible source of energy is

a)

hydropower

b)

solar energy

c)

wind energy

d)

thermal energy

155.

Global warming will cause

a)

raise in level of oceans

b)

melting of glaciers

c)

sinking of islands

d)

all of these

156.

Which of the following statement is wrongwith respect to wind energy

a)

wind energy is a renewable energy

b)

the blades of wind mill are operated with the help of electric motor

c)

production of wind energy is pollution free

d)

usage of wind energy can reduce the consumption of fossil fuels

157.

Deforestation leads to (a)   in rainfall.

158.

Removal of soil particles from the land is called (a)   .

159.

Chipko movement is initiated against (a)  

160.

(a)   is a biosphere reserve in Tamilnadu

161.

Tidal energy is (a)   type of energy

162.

Coal, petroleum and natural gas are called (a)   fuels

163.

(a)   is the most commonly used fuel for the production of electricity.

164.

Biogenetic law states that ______________

a)

Ontogeny and phylogeny go together

b)

Ontogeny recapitulates phylogeny

c)

Phylogeny recapitulates ontogeny

d)

There is no relationship between phylogeny and ontogeny

165.

The ‘use and disuse theory’ was proposed by ______________.

a)

Charles Darwin

b)

Ernst Haeckel

c)

Jean Baptiste Lamarck

d)

Gregor Mendel

166.

Paleontologists deal with

a)

Embryological evidences

b)

Fossil evidences

c)

Vestigial organ evidences

d)

All the above

167.

The best way of direct dating fossils of recent origin is by

a)

Radio-carbon method

b)

Radio-carbon method

c)

Potassium-argon method

d)

Both (a) and (c)

168.

The term Ethnobotany was coined by

a)

Khorana

b)

J.W. Harsbberger

c)

Ronald Ross

d)

Hugo de Vries

169.

The characters developed by the animals during their life time, in response to the environmental changes are called (a)   .

170.

The degenerated and non-functional organs found in an organism are called (a)  

171.

The forelimbs of bat and human are examples of (a)   organs

172.

The theory of natural selection for evolution was proposed by (a)   .

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