Biology Practice Test 4

Biology Practice Test 4 is designed to help students strengthen their understanding of key biological concepts, theories, and processes for competitive entry tests like MDCAT, NUMS, AKU, UET, ECAT, NTS, as well as FSC Board Exams. This test covers topics from human anatomy, physiology, microbiology, and ecology, helping students improve accuracy and retention.

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Biology Practice Test 4

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1 / 100

Category: Biology

Q.16 Which of the following changes length during sarcomere contraction?

A. Thick filaments

B. Thin filaments

C.H zone

D. all of these Inco

2 / 100

Category: Biology Ch 5 Class 11

First infectious disease against which effective method of prevention developed was a _______:

NUMS 2020
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Bacterial disease

B) Viral disease

C) Protozoan disease

D) Viroid disease

3 / 100

Category: Biology Ch 12 Class 12

Evolution of vascular bundles in plants and skeleton in animals is an adaptation for

Hdrospheric ecosystem

Aquatic ecosystem

Terrestrial ecosystem

All of these

4 / 100

Category: Biology Ch 4 Class 12

Colour of corpus luteum is:

NUMS 2018
Biology
Reproduction
Elimination Tool:

A) Red

B) Yellow

C) Grey

D) Black

5 / 100

Category: Biology Ch 3 Class 11

Optimum temperature for enzymes of human body is:

NUMS 2018
Biology
Enzymes
Elimination Tool:

A) 90 F

B) 95 F

C) 98 F

D) 100 F

6 / 100

Category: Biology Ch 13 Class 12

Which statement is true?

20% of total water is in the form of frozen ice caps

80% is in oceans

1% as fresh water lakes, streams and rivers

10% is in canals

7 / 100

Category: Biology Ch 6 Class 12

What will be the approximate length of a DNA strand having 500 nucleotides?

NUMS 2015
Biology
Chromosomes and DNA
Elimination Tool:

HIDE ELIMINATED OPTIONS

A) 100 nm

B) 130 nm

C) 170 nm

D) 150 nm

8 / 100

Category: Biology Ch 9 Class 12

Organisms that have had a foreign gene inserted into them are

Transformed organisms

Transgenic organisms

Transfigured organisms

Recombinant organisms

9 / 100

Category: Biology Ch 3 Class 12

The estrogen hormone secretion during the oogenesis is stimulated by:

NUMS 2020
Biology
Coordination and Control
Elimination Tool:

A) LH hormone

B) Inhibition hormone

C) FSH hormone

D) Testosterone hormone

10 / 100

Category: Biology Ch 2 Class 11

When the hydroxyl group, -OH, of the carboxyl group, -COOH, of an amino acid is linked with the hydrogen of the amino group, -NH2, of another amino acid, ______ is released and a peptide bond is formed.

NUMS 2019 Reconduct
Biology
Biological Molecules
Elimination Tool:

A) NH3

B) CO2

C) H2O

D) O2

11 / 100

Category: Biology Ch 13 Class 11

The passageways of the respiratory system mucous secreting cells called:

NTS 2019
Biology
Gaseous Exchange
Elimination Tool:

A) Tracheal cells

B) Goblet cells

C) Surfactant cells

D) Pleural cells

12 / 100

Category: Biology Ch 8 Class 11

Parasitic fungi absorbs nutrients directly from the living host with the help of special hyphae tips called _______.

NTS 2012
Biology
Kingdom Fungi
Elimination Tool:

A) Roots

B) Root hair

C) Rhizoids

D) Haustoria

13 / 100

Category: Biology Ch 12 Class 12

Zone of lake water which is of open water near the surface is

Littoral

Limnetic

Profundal

Benthic

14 / 100

Category: Biology

The spectrum of He is expected to be similar to that of:

NUMS Mock 4
Chemistry
Atomic Structure

A) Hydrogen

B) Sodium

C) Oxygen

D) Li+

15 / 100

Category: Biology Ch 8 Class 12

How many genes control Rh blood group system?

One

Two

Three

Four

16 / 100

Category: Biology

What type of virus is the smallpox virus?

NUMS Mock 1
Biology
Bio-diversity | Variety of Life

A) DNA enveloped virus

B) RNA enveloped virus

C) DNA virus

D) RNA naked virus

17 / 100

Category: Biology Ch 11 Class 11

Estimating relative CO2consumption or O2release during photosynthesis at different wavelengths of light, is termed as:

NUMS 2015
Biology
Bioenergetics
Elimination Tool:

A) Action spectrum

B) Absorption spectrum

C) Dark reaction

D) Light reaction

18 / 100

Category: Biology Ch 6 Class 11

Who discovered the bacteria causing tuberculosis and also developed various techniques of media preparation and maintenance of pure culture?

Robert Koch

Louis Pasteur

Alexander Fleming

Leeuwenhoek

19 / 100

Category: Biology Ch 4 Class 12

Which organ(s) in the male reproductive system produce gametes?

NUMS 2018
Biology
Reproduction
Elimination Tool:

A) Vas deferens

B) Malpighian tubule system

C) Seminiferous tubules

D) Ejaculatory duct

20 / 100

Category: Biology Ch 9 Class 11

Antheridia and archegonia are _____ organs in bryophytes.

NTS 2015 DUHS and JSMU
Biology
Kingdom Plantae
Elimination Tool:

A) Reproductive

B) digestive

C) respiratory

D) none of the above

21 / 100

Category: Biology Ch 2 Class 12

Which of the following plays the major role in providing support to young herbaceous parts of the plant:

Living cells of epidermis with higher turgor pressure.

Living cells of cortex and pith with higher turgor pressure.

Collenchyma cells

All of these

22 / 100

Category: Biology Ch 10 Class 11

Which one of the following does not have intermediate host?

NUMS 2016
Biology
Kingdom Animalia
Elimination Tool:

A) Tapeworm

C) Liver fluke

B) Ascaris

D) Plasmodium

23 / 100

Category: Biology Ch 12 Class 11

_____ is activated to ______ by enterokinase / enteropeptidase enzyme secreted the lining of duodenum:

NUMS 2019 Cancelled
Biology
Nutrition
Elimination Tool:

A) Pepsinogen, pepsin

B) Trypsinogen, trypsin

C) Pepsinogen, trypsin

D) Chymotrypsinogen, chymotrypsin

24 / 100

Category: Biology Ch 8 Class 11

The most common example of members of the kingdom fungi is/are:

NUMS 2015
Biology
Kingdom Fungi
Elimination Tool:

A) Star fish

B) Mushrooms

C) Algae

D) Human

25 / 100

Category: Biology Ch 1 Class 12

The active uptake of sodium in the ascending limb or thick loop of Henle is promoted by the action of:

PMC 2020
Biology
Homeostasis
Elimination Tool:

A) Aldosterone

B) Thyroxine

C) ADH

D) Cortisone

26 / 100

Category: Biology

Q.8 The neurons responsible for everything various external stimuli that come from the environment into corresponding internal stimuli is called:

A. Motor nerve

B. Sensory nerve

C. Both A and B

D. Mixed nerve

27 / 100

Category: Biology Ch 6 Class 12

Transfer of genetic material from one cell to another that can alter the genetic makeup of recipient cell is called

Mutation

Transuction

Replication

Variation

28 / 100

Category: Biology Ch 1 Class 11

Group of living organisms of the same species living in the same place at the same time is called

Community

Ecosystem

Biome

29 / 100

Category: Biology Ch 12 Class 11

Carbohydrates, fats & proteins are essential for:

Metabolic processes of an organism

Providing energy

Formation of sturctures

All of these

30 / 100

Category: Biology Ch 3 Class 12

Direction of reflex action is from:

NUMS 2019 Reconduct
Biology
Coordination and Control
Elimination Tool:

A) Receptor to sensory neuron to motor neuron and then through associative neurons to effect.

B) Receptor to sensory neuron to associative neuron and then through motor neurons to effector.

C) Effector to sensory neuron to associative neuron and then through motor neurons to Receptor.

D) Effector to sensory neuron to motor neuron and then through associative neurons to Receptor.

31 / 100

Category: Biology Ch 9 Class 11

The part of sporophyte which is called sporangium is

Capsule

Foot

Stalk

None of these

32 / 100

Category: Biology Ch 12 Class 12

Ecosystem of Shogran is

Coniferous alpine

Boreal

temperate deciduous

Grassland

33 / 100

Category: Biology Ch 13 Class 11

During breathing air from Pharynx enters to:

UHS 2018
Biology
Gaseous Exchange
Elimination Tool:

A) Trachea

B) Bronchioles

C) Alveoli

D) Bronchi

34 / 100

Category: Biology Ch 1 Class 12

Thick, waxy & leathery cuticle around leaves is present in

Hydrophytes

Mesophytes

Xerophytes

Halophytes

35 / 100

Category: Biology Ch 1 Class 12

Which excretory product in produced in plants during autotrophic mode of life?

CO2

H2O

Both A and B

36 / 100

Category: Biology Ch 3 Class 12

Which body function is controlled through a positive feedback mechanism?

PMC 2020
Biology
Coordination and Control
Elimination Tool:

A) Labor contractions

B) Body temperature

C) Insulin production

D) Thyroxine release

37 / 100

Category: Biology Ch 8 Class 12

A pea plant with yellow seed was crossed to a plant having green seeds. What will happen in F1; if plants are true breeding

All seeds will be yellow

Half of seeds will be yellow

All the seeds will be green

Both will be present in ratio of 1:2:1

38 / 100

Category: Biology

Which of the following transport mechanism induces conformational change in protein?

A. Simple diffusion

B. Facilitated diffusion

C. Active transport

D. Endocytosis

39 / 100

Category: Biology Ch 6 Class 11

The causing agent of the tuberculosis that grows very well in poor living conditions and malnutrition is:

NUMS 2019 Cancelled
Biology
Kingdom Prokaryote
Elimination Tool:

A) Spirobacterium

B) Mycobacterium

C) E.Coli

D) Staphylococcus

40 / 100

Category: Biology Ch 9 Class 12

Liposomes have/are:

PMC 2021 Tested
Biology
Biotechnology
Elimination Tool:

A) Fluid in center

B) Lipid bilayer

C) All of these

D) Carrier for drugs

41 / 100

Category: Biology

The finger like infoldings, which are formed by inner membrane of mitochondria, are called:

NUMS Mock 2
Biology
Cell Structure and Function

A) Ribosomes

B) Matrix

C) Porin

D) Cristae

42 / 100

Category: Biology Ch 2 Class 12

Pick the mismatched pair for birds:

NUMS 2015
Biology
Support and Movement
Elimination Tool:

A) Air spaces – lighter body

B) Pectoral muscles – strong pull of wings

C) Urinary bladder – producing semisolid urine

D) Keel – attachment of muscles

43 / 100

Category: Biology Ch 5 Class 12

In some cases, the blastomere can produce complete embryo so, the cleavage will be:

PMC Practice 1
Biology
Growth and Development
Elimination Tool:

A) Spiral and determinate

B) Spiral and indeterminate

C) Radial and determinate

D) Radial and indeterminate

44 / 100

Category: Biology Ch 4 Class 11

Which of the statement about cell membrane is not true?

It contains protein molecules embedded in lipid bilayer

It is a differentially permeable membrane.

It contains charged pores thus ions being charged particles cross cell membrance much easier than neutral particles.

It may get infolded to engulf solid or liquid material.

45 / 100

Category: Biology

Amylase is not produced by the following type(s) of salivary gland:

NUMS Mock 1
Biology
Nutrition

A) Parotid

B) Submandibular

C) Sublingual

D) None of the given options are correct

46 / 100

Category: Biology Ch 11 Class 12

Plants growing in xeric conditions are called

Spherophytes

Mesophytes

Xerophytes

Teridophytes

47 / 100

Category: Biology

Q.7 The thalamus and the hypothalamus are located in which region of the brain?

A. brain stem

B. cerebrum

C. cerebellum

D. Diencephalon

48 / 100

Category: Biology Ch 10 Class 12

Which condition can be explained by Lamarckism?

PMC Sample 1
Biology
Evolution
Elimination Tool:

A) How giraffes got their long neck

B) How humans lost their tail

C) How humans became bipedal

D) all of these

49 / 100

Category: Biology Ch 12 Class 11

Undigested food in cockroach is stored in:

NUMS 2015
Biology
Nutrition
Elimination Tool:

A) Crop

B) Rectum

C) Gizzard

D) Crop & Rectum

50 / 100

Category: Biology Ch 9 Class 11

Dark purple or black spore cases of Claviceps purpurea are called:

NUMS 2015
Biology
Kingdom Plantae
Elimination Tool:

A) Smuts

B) Rusts

C) Ergots

D) Aspergins

51 / 100

Category: Biology

In which of the following phases of bacterial growth, is the death rate more rapid than the multiplication rate?

NUMS Mock 2
Biology
Kingdom Prokaryote

A) Stationary phase

B) LAG phase

C) Decline phase

D) LOG phase

52 / 100

Category: Biology Ch 3 Class 12

Which of the following is antagonist to Auxin in terms of promotion of stem growth?

Gibberellins

Cytokinins

Abscisic Acid

none of these.

53 / 100

Category: Biology Ch 5 Class 11

DNA or RNA of viruses is enclosed in ______ coat:

Protein

Carbohydrate

Lipid

DNA

54 / 100

Category: Biology Ch 4 Class 12

In cloning, nucleus is introduced into

Somatic cell

Egg cell

Sperm cell

None of thes

55 / 100

Category: Biology

Q.63 What event occurs in the menstrual cycle when the level of progesterone declines?

A. Ovulation

B. Menstruation

C. Menopause

D. Fertilization

56 / 100

Category: Biology Ch 5 Class 12

Typical symptoms like enlarged breasts and small testis in male are attributed to:

UHS 2015
Biology
Growth and Development
Elimination Tool:

A) Down’s Syndrome

B) Turner’s Syndrome

C) Klinefelter’s Syndrome

D) Phenylketonuria

57 / 100

Category: Biology Ch 10 Class 12

Whose theory of natural selection is essentially identical to Darwin’s theory?

NUMS 2019 Cancelled
Biology
Evolution
Elimination Tool:

A) Hardy-Weinberg

B) Alfred Wallace

C) Lyell

D) Mathus

58 / 100

Category: Biology Ch 2 Class 12

Many _______ expel a large amount of water by special structures called contractile vacuoles:

NUMS 2020
Biology
Support and Movement
Elimination Tool:

A) Protozoa

B) Porifera

C) Echinoderm

D) Fish

59 / 100

Category: Biology Ch 4 Class 12

In which of the following options is mitotic division involved?

NUMS 2015
Biology
Reproduction
Elimination Tool:

A) Oogonium to primary oocyte

B) Primary oocyte to secondary oocyte

C) Secondary oocyte to egg

D) None of the given options

60 / 100

Category: Biology Ch 8 Class 12

Baldness is most frequent in

Men

Women

Children

Girls

61 / 100

Category: Biology Ch 8 Class 12

How many pairs of homologous chromosomes are present in Pisum sativum

Five pairs

Six pairs

Seven pairs

Eight pairs

62 / 100

Category: Biology Ch 5 Class 11

Viruses resemble living things because they:

NTS 2017
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Circulate

B) Move

C) Reproduce

D) Are crystalline

63 / 100

Category: Biology Ch 4 Class 11

The cell membrane surrounds the:

NUMS 2016
Biology
Cell Structure and Function
Elimination Tool:

A) Nucleoplasm

B) Cell wall

C) Protoplasm

D) None of the above

64 / 100

Category: Biology Ch 9 Class 11

The flower of family gramineae process contain two scales below ovary which are called:

NUMS 2014
Biology
Kingdom Plantae
Elimination Tool:

A) Glumes

B) Lemma and palea

C) Lodicule

D) Rochella

65 / 100

Category: Biology Ch 3 Class 11

Which of the following statements is incorrect?

PMC Practice 1
Biology
Enzymes
Elimination Tool:

A) The competitive inhibitor affects the rate of breakdown of the enzyme-substrate complex

B) The presence of the competitive inhibitor decreases the Km of the enzyme for the substrate

C) A competitive inhibitor reacts reversibly with the enzyme to form an enzyme-inhibitor complex

D) In competitive inhibition, the inhibitor molecule is not chemically changed by the enzyme

66 / 100

Category: Biology Ch 8 Class 11

The most common example of members of the kingdom fungi is/are:

NUMS 2019 Reconduct
Biology
Kingdom Fungi
Elimination Tool:

A) Star fish

B) Mushrooms

C) Algae

D) Human

67 / 100

Category: Biology

Q.52 The patellar reflex and the Achilles reflex are examples of:

A. Monosynaptic reflex

B. Polysynaptic reflex

C. Hemi Synaptic reflex

D. Both A and B

68 / 100

Category: Biology Ch 3 Class 12

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:

Gibberellins

Cytokinins

Auxins

Ethene

69 / 100

Category: Biology Ch 9 Class 11

Ferns are included in

Psilopsida

Lycopsida

Sphenopsida

Pteropsida

70 / 100

Category: Biology

Proteins and lipids are converted into glycolipids and glycoproteins by adding carbohydrates by?

NUMS Mock 4
Biology
Cell Structure and Function

A) Ribosomes

B) Cytoplasm

C) Golgi apparatus

D) Endoplasmic reticulum

71 / 100

Category: Biology Ch 14 Class 11

In human heart, the left atrium receives:

PMC 2020
Biology
Transport
Elimination Tool:

A) The superior vena cava

B) The inferior vena cava

C) The coronary sinus

D) The four pulmonary veins

72 / 100

Category: Biology Ch 3 Class 11

Enzymes work by lowering the ______ of the reactions they catalyse:

PMC 2020
Biology
Enzymes
Elimination Tool:

A) Kinetic energy

B) Activation energy

C) Heat energy

D) Potential energy

73 / 100

Category: Biology Ch 14 Class 11

Antibodies are actually:

NUMS 2016
Biology
Transport
Elimination Tool:

A) Globular proteins

B) Glycoproteins

C) Fibrous proteins

D) Glycolipids

74 / 100

Category: Biology Ch 6 Class 11

Which of the following has a chain arrangement?

Streptobacillus

Streptococci

Staphylococci

Both A and B

75 / 100

Category: Biology Ch 9 Class 12

In recombinant DNA technology, the copies of recombinant DNA are increased by:

NTS 2018
Biology
Biotechnology
Elimination Tool:

A) Restriction enzyme

B) Ligase

C) Selection of host with rDNA

D) Multiplication of host with rDNA

76 / 100

Category: Biology Ch 6 Class 12

The Meselson and Stahl experiment confirmed that DNA replicates in _____ manner.

NUMS 2019 Reconduct
Biology
Chromosomes and DNA
Elimination Tool:

A) Conservative

B) Semi – conservative

C) Dispersive

D) New synthesis

77 / 100

Category: Biology

Q.53 In case of snake bite, the most appropriate strategy to provide immunity would be:

A. Actively induced immunity

B. Artificial passive immunity

C. Naturally induced immunity

D. Auto immunity

78 / 100

Category: Biology Ch 14 Class 11

Semilunar valves are not present:

NUMS 2015
Biology
Transport
Elimination Tool:

A) At the base of the pulmonary trunk

B) At the base of the aorta

D) In the coronary arteries

C) In veins

79 / 100

Category: Biology

Q.29 A monohybrid cross yielded 3:1 in F2. What could be mode of inheritance?

A. segregation

B. independent assortment

C. Both A and B

D. none of these

80 / 100

Category: Biology Ch 14 Class 11

Which of the following blood vessels have the highest pressure of blood?

NUMS 2020
Biology
Transport
Elimination Tool:

A) Aorta

B) Pulmonary arteries

C) Pulmonary veins

D) Vena Cava

81 / 100

Category: Biology Ch 1 Class 12

In plants which of the following is a waste product produced both during photosynthesis and respiration

CO2

H2O

Both A and B

82 / 100

Category: Biology Ch 11 Class 11

During cellular respiration NADH2 produces:

NUMS 2014
Biology
Bioenergetics
Elimination Tool:

A) 2 ATP

B) 3 ATP

C) 4 ATP

D) 5 ATP

83 / 100

Category: Biology Ch 13 Class 12

In air nitrogen is

57%

20%

79%

30%

84 / 100

Category: Biology Ch 8 Class 12

When phenotype of a heterozygote is in between the phenotypes of both the homozygous parents, it is called:

NUMS 2016
Biology
Variation and Genetics
Elimination Tool:

A) Incomplete dominance

B) Epistasis

C) Pleiotropy

D) Codominance

85 / 100

Category: Biology Ch 1 Class 12

________ are animals that do not adjust their internal osmolality and are isotonic with their environment.

NUMS 2019 Cancelled
Biology
Homeostasis
Elimination Tool:

A) Osmoconformers

B) Osmoregulators

C) Thermoregulators

D) Thermoconformers

86 / 100

Category: Biology

Q.14 Protein coat of a virus enclosing nucleic acid is called?

A. Vector

B. Capsid

C. Plasmid

D. Genome

87 / 100

Category: Biology Ch 12 Class 11

Translocation of organic solutes in plants takes place through:

NUMS 2020
Biology
Nutrition
Elimination Tool:

A) Companion cell

B) Fibres

C) Sieve tubes

D) Vessels

88 / 100

Category: Biology Ch 7 Class 12

Feature of cancer cells in common?

High nucleus to cytoplasmic ratio

Prominent nucleoli

Many mitosis

All of these

89 / 100

Category: Biology Ch 5 Class 11

The long chains of HIV-proteins are cut down by proteases enzyme of ______.

PMC Sample 2
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) HIV virus

B) Host proteases

C) Both viral and host proteases

D) None of these options is correct

90 / 100

Category: Biology Ch 10 Class 11

The simplest form in Kingdom Animalia belongs to:

NUMS 2018
Biology
Kingdom Animalia
Elimination Tool:

A) Eumetazoa

B) Bilateria

C) Protozoa

D) Parazoa

91 / 100

Category: Biology

Q48 Which statement is incorrect about Lock and Key Model?

A. Specific enzyme can transform only a specific substrate

B. Active site of an enzyme is a non-flexible structure

C. Active site does not change before during or even after the reaction

D. It explains the mechanism of every chemical reaction

92 / 100

Category: Biology

Lymph nodes are not present:

NUMS Mock 1
Biology
Coordination and Control

A) Neck region

B) Axilla

C) Groin

D) Spleen

93 / 100

Category: Biology Ch 1 Class 12

Which of the following occurs in the body in response to the secretion of Glucagon?

NUMS 2020
Biology
Homeostasis
Elimination Tool:

A) Conversion of glucose to glycogen in liver cells

B) Decrease in blood glucose concentration

C) Increased uptake of glucose by muscle cells

D) Production of cyclic AMP in target cells

94 / 100

Category: Biology Ch 4 Class 12

The sexually transmitted disease, that can affect both the male and the female genitals and may damage the eyes of babies born of infected mothers is:

PMC Sample 1
Biology
Reproduction
Elimination Tool:

A) AIDS

B) Hepatitis

C) Gonorrhoea

D) All of these

95 / 100

Category: Biology

Muscular tube that passes through pharynx and joins stomach is:

NUMS Mock 1
Biology
Nutrition

A) Trachea

B) NG tube

C) Nerve canal

D) Esophagus

96 / 100

Category: Biology Ch 7 Class 12

If a person has 44 autosomes + XXY, he will suffer from

UHS 2012
Biology
Cell Cycle
Elimination Tool:

A) Klinefelter’s syndrome

B) Down’s syndrome

C) Turner’s syndrome

D) Edward’s syndrome

97 / 100

Category: Biology Ch 13 Class 11

_________ respiration is directly involved in the production of energy, necessary for all living activities.

Organismic

Cellular

Both of these

None of thes

98 / 100

Category: Biology

Q.13 Cellulose is the major component of?

A. Primary wall

B. Secondary wall

C. Middle lamella

D. All of these

99 / 100

Category: Biology Ch 14 Class 11

Antibodies are manufactured in:

PMC 2020
Biology
Transport
Elimination Tool:

A) T Lymphocytes

B) Red Blood Cells

C) Platelets

D) B Lymphocytes

100 / 100

Category: Biology

Eukaryotic, multicellular, and consumers belong to ______ kingdom.

NUMS Mock 3
Biology
Bio-diversity | Variety of Life

A) Monera

B) Protista

C) Fungi

D) Animalia

Your score is

The average score is 61%

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