Biology Practice Test 1

Created by Ali Durrani

MDCAT Practice Tests

Biology Practice Test 1

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1 / 100

Category: Biology Ch 7 Class 12

Gametes in animals are produced by:

PMC 2021 Tested
Biology
Cell Cycle
Elimination Tool:

A) Meiosis

B) Fission

C) Mitosis

D) All three

2 / 100

Category: Biology Ch 2 Class 11

The disease caused by nutritional deficiency is:

NTS 2018
Biology
Biological Molecules
Elimination Tool:

A) Hepatitis

B) Cholera

C) Malaria

D) Beriberi

3 / 100

Category: Biology Ch 8 Class 12

The position of a gene on chromosome is called

Habitat

Position

Locus

Location

4 / 100

Category: Biology Ch 13 Class 11

Which of the following is not an infection of the lungs/respiratory tract?

NUMS 2015
Biology
Gaseous Exchange
Elimination Tool:

A) Histoplasmosis

B) Tuberculosis

C) Cystic fibrosis

D) None of the given options

5 / 100

Category: Biology Ch 3 Class 11

The inhibitor which closely resembles the substrate in its molecular structure and inhibits the enzyme activity by binding to the active site of the enzyme is called:

NTS 2013
Biology
Enzymes
Elimination Tool:

A) Feedback inhibitor

B) Non-competitive inhibitor

C) Allosteric modulator

D) Competitive inhibitor

6 / 100

Category: Biology Ch 14 Class 11

Which of the following is NOT a part of the immune system?

NTS 2018
Biology
Transport
Elimination Tool:

A) Phagocytes

B) Complement Proteins

C) Cytokines

D) Atherosclerosis

7 / 100

Category: Biology

The region of the chromosome or, more specifically, the length of the DNA molecule, which has a particular function is called _______.

NUMS Mock 2
Biology
Chromosomes and DNA

A) Kinetochore

B) Locus

C) Allele

D) Gene

8 / 100

Category: Biology Ch 9 Class 11

What is an example of sperms of liverworts, mosses, ferns which move towards archegonia, in response to nucleic acid released by the ovum?

PMC Practice 7
Biology
Kingdom Plantae
Elimination Tool:

A) Chemotropic movement

B) Chemonastic movement

C) Haptonastic movement

D) Chemotactic movement

9 / 100

Category: Biology Ch 10 Class 11

The fate of each blastomere is foretold. The cleavage will be as

Spiral and indeterminate

Radial and indeterminate

Spiral and determinate

10 / 100

Category: Biology

Q.9 This is a reduced compound

A. CO2

B. O2

C. NADH

D. NAD

11 / 100

Category: Biology Ch 10 Class 11

Of the following which one is non-cellular in most cases in animals?

Mesenchyme

Sclerenchyma

Chlorenchyma

Mesoderm

12 / 100

Category: Biology Ch 3 Class 11

In 1959, Koshland proposed which of the following?

PMC Practice 1
Biology
Enzymes
Elimination Tool:

A) Unit membrane model

B) Fluid mosaic model

C) Reflective index model

D) Induced fit model

13 / 100

Category: Biology Ch 10 Class 11

Pseudo coelomate animals are:

NUMS 2014
Biology
Kingdom Animalia
Elimination Tool:

A) Coelenterates

B) Nematodes

C) Annelids

D) None of them

14 / 100

Category: Biology Ch 7 Class 11

Brown algae are also known as

Phaeophyta

Rhodophyta

Pyrrophyta

Chrysophyta

15 / 100

Category: Biology Ch 6 Class 12

Who discovered DNA?

P.A.Levene

Frederick Griffith

Friedrich Miescher

Rosalind Franklin

16 / 100

Category: Biology Ch 2 Class 12

In presence of muscle contraction, ______ is brought closer, _____ shortens and ______ disappears.

NUMS 2019 Reconduct
Biology
Support and Movement
Elimination Tool:

A) Z – line, H – zone, I – band

B) I – band, Z – line, H – zone

C) Z – line, I – band, H – zone

D) H – zone, I – band, Z – line

17 / 100

Category: Biology

Q.9 A surfactant is essential for:

A. Efficient gas exchange

B. Maintaining structural integrity of alveoli

C. Both A and B

D. None of these

18 / 100

Category: Biology Ch 6 Class 12

A tortion of chromatin that is condensed only during cell division is

Euchromatin

Heterochromatin

Biochromatin

Nucleochromatin

19 / 100

Category: Biology Ch 2 Class 12

Pectoral fins are enlarged in:

NUMS 2015
Biology
Support and Movement
Elimination Tool:

A) Whales

B) Sharks

C) Skates

D) Plaice

20 / 100

Category: Biology

Hemoglobin carries more oxygen than plasma by:

NUMS Mock 1
Biology
Gaseous Exchange

A) 50 times

B) 20 times

C) 70 times

D) 100 times

21 / 100

Category: Biology Ch 7 Class 11

Which of the following statement is incorrect about algae?

Their zygote unlike plants is protected by parental tissue.

Their classification is based on pigment composition.

Most of them have different morphological forms in-different stages of their life cycle.

Almost all of them are aquatic.

22 / 100

Category: Biology Ch 10 Class 12

In humans gill pouches have modified into

Nose

Ear

Eustachian tubes

External ear

23 / 100

Category: Biology Ch 1 Class 12

Deamination in the liver initially produces:

NTS 2010
Biology
Homeostasis
Elimination Tool:

A) Ammonia

B) Arginine

C) Ornithine

D) Urea

24 / 100

Category: Biology

Movement of the Hip joint is which type of synovial joints?

NUMS Mock 1
Biology
Support and Movement

A) Gliding joint

B) Ball and socket joint

C) Pivot joints

D) Hinge joint

25 / 100

Category: Biology Ch 4 Class 12

In asexual reproduction offspring are produced by which of the following?

PMC Sample 2
Biology
Reproduction
Elimination Tool:

A) meiosis

B) mitosis

C) both a and b

D) none of these

26 / 100

Category: Biology Ch 2 Class 11

Which one are most complex sugar:

Monosaccharides

Oligosaccharides

Polysaccharides

None of these

27 / 100

Category: Biology Ch 9 Class 11

Which type of leucoplasts store lipids?

NUMS 2020
Biology
Kingdom Plantae
Elimination Tool:

A) Amyloplast

B) Elaioplast

C) Proteinoplast

D) Etioplast

28 / 100

Category: Biology Ch 9 Class 12

Genetic engineering has been successfully used for producing;

UHS 2019
Biology
Biotechnology
Elimination Tool:

A) Animals, with inferior traits.

B) Transgenic mice for testing safety of polio vaccine before use in humans

C) Animals, that have the same genetic constitution.

D) None of the above

29 / 100

Category: Biology Ch 12 Class 11

Stunted growth of roots is due to the deficiency of _____ in plants

Potassium

Magnesium

Phosphorus

Iron

30 / 100

Category: Biology Ch 6 Class 11

Which one of the following sets includes the bacterial diseases?

NUMS 2014
Biology
Kingdom Prokaryote
Elimination Tool:

A) Cholera, typhoid, mumps

B) Tetanus, tuberculosis, measles

C) Malaria, mumps, poliomyelitis

D) Diphtheria, leprosy, plague

31 / 100

Category: Biology

The uterus of the female reproductive system opens into the _____.

NUMS Mock 4
Biology
Reproduction

A) Placenta

B) Birth canal

C) Cervix

D) All of these options are correct

32 / 100

Category: Biology Ch 5 Class 12

Meristems are group of cells that

Allow the surrounding region to divide

Provide nutrition

. Help in movement

Retain the potential to divide

33 / 100

Category: Biology Ch 9 Class 12

Cystic fibrosis patients lack a gene that codes for a transmembrane carrier of:

NTS 2017
Biology
Biotechnology
Elimination Tool:

A) Na+ ions

B) K+ ions

C) CI- ions

D) Ca2+ ions

34 / 100

Category: Biology Ch 7 Class 12

During the G2 phase:

UHS 2019
Biology
Cell Cycle
Elimination Tool:

A) Chromosome number is duplicated

B) The chromosomes are left with only one chromatid

C) Energy is stored for Chromosome movement and mitotic specific proteins(Tubulin) are produced

D) Specific enzymes are synthesized and DNA base units are accumulated

35 / 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

36 / 100

Category: Biology Ch 12 Class 11

Magnesium is present in which of the following?

Cytochromes

ATP

Chlorophyll

Haemoglobin

37 / 100

Category: Biology Ch 2 Class 11

% of water in brain cells is

20%

80%

85%

90%

38 / 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

39 / 100

Category: Biology Ch 1 Class 12

Marine fish can keep their internal environment hypertonic with respect to the surrounding salty water by retaining.

Excessive urea which will increase their internal solute concentration and prevent body shrinkage in hypertonic environment

Trimethyl alanine

Ammonia

Trimethylamine oxide

40 / 100

Category: Biology Ch 13 Class 12

Total area of the world under cultivation is

5%

11%

21%

31%

41 / 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

42 / 100

Category: Biology

The end product of glycolysis in anaerobic respiration is:

NUMS Mock 4
Biology
Bioenergetics

A) Ethanol and Carbon dioxide

B) Lactate

C) Pyruvate

D) Both A and B

43 / 100

Category: Biology Ch 9 Class 12

Treatment of hereditary disorders by gene manipulations is called:

NUMS 2016
Biology
Biotechnology
Elimination Tool:

A) Biotechnology

B) Genetic engineering

C) Gene therapy

D) None of these

44 / 100

Category: Biology Ch 9 Class 12

The technique use of identification of criminals is called:

NTS 2018
Biology
Biotechnology
Elimination Tool:

A) Cloning

B) DNA fingerprinting

C) Restriction Analysis

D) Polymorphism

45 / 100

Category: Biology Ch 1 Class 11

Biological sciences have a set methodology and it is based on

Experimental inquiry

Esthetic preference

Philosophical ideas

Imaginations

46 / 100

Category: Biology Ch 5 Class 11

HIV is also known as:

NUMS 2014
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) AIDS

B) HAV

D) HBV

C) HTLV

47 / 100

Category: Biology Ch 5 Class 12

_____ cells store surplus food and _____ cells produce new cells for growth and development of the plant:

NUMS 2019 Cancelled
Biology
Growth and Development
Elimination Tool:

A) Parenchymatous: meristematic

B) Sclerenchymatous; chlorenchymatous

C) Phloem; Meristematic

D) Parenchymatous; Chlorenchymatous

48 / 100

Category: Biology Ch 12 Class 11

Intrinsic factor is secreted by:

NUMS 2020
Biology
Nutrition
Elimination Tool:

A) Pancreas

B) Liver

C) Stomach

D) Duodenum

49 / 100

Category: Biology Ch 4 Class 12

In cloning, nucleus is introduced into

Somatic cell

Egg cell

Sperm cell

None of thes

50 / 100

Category: Biology Ch 1 Class 12

Malpighian tubules are involved in excretion in:

NTS 2011
Biology
Homeostasis
Elimination Tool:

A) Cockroach

B) Earthworm

C) Human

D) Planaria

51 / 100

Category: Biology Ch 1 Class 11

The concept that various organisms dominated this planet during various geological time period and thus placing organisms in a time squence came from the studies by

Environmental biologist

Paleontologist

Marine biologist

Social biologist

52 / 100

Category: Biology Ch 8 Class 12

What CANNOT be true for a man having B+ve blood group?

NUMS 2019 Reconduct
Biology
Variation and Genetics
Elimination Tool:

A) His mother’s blood group is BB

B) His mother’s blood group is BO

C) His father’s blood group is AO

D) His father’s blood group is AA

53 / 100

Category: Biology Ch 5 Class 12

Determinate growth is

. Growing continuously

Fluctuating growth

Grow to certain size and then stop

Vegetative roots and shoots grow by

54 / 100

Category: Biology Ch 10 Class 12

Homology means

PMC Sample 3
Biology
Evolution
Elimination Tool:

A) similiarity in characteristics resulting from common ancestors

B) similarity in function from acquired characterists

C) study of different ograns but with similar functions

D) study of similar ograns but with different functions

55 / 100

Category: Biology Ch 8 Class 12

Which of the following does not belong to the same linkage group?

NUMS 2015
Biology
Variation and Genetics
Elimination Tool:

A) Sickle cell anemia

B) Albinism

C) Leukemia

D) Gout

56 / 100

Category: Biology Ch 7 Class 12

Which of the following is NOT true for meiosis?

NUMS 2019 Reconduct
Biology
Cell Cycle
Elimination Tool:

A) Number of chromosomes reduced to half

B) It takes place at the time of spore formation in plants

C) It takes place at the time of growth in animals

D) Two consecutive cell divisions are involved in it

57 / 100

Category: Biology Ch 13 Class 11

Xerophytes have small thick leaves to;

UHS 2019
Biology
Gaseous Exchange
Elimination Tool:

A) Help them float on water

B) Limit water loss, by increasing the surface area

C) Help them survive in salty environment

D) Limit water loss, by reducing the surface area

58 / 100

Category: Biology Ch 3 Class 12

Thyroid gland requires high amount of:

NUMS 2016
Biology
Coordination and Control
Elimination Tool:

A) Phosphate

B) Calcium

C) Iodine

D) Sodium

59 / 100

Category: Biology Ch 5 Class 12

Thymus is found in the human body in _____.

PMC Practice 2
Biology
Growth and Development
Elimination Tool:

A) The medulla oblongata

B) The mediastinum of the upper thorax

C) Both Options A and B are correct

D) None of these options is correct

60 / 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

61 / 100

Category: Biology Ch 8 Class 12

A cross between F1 hybrids and either of parents is called:

NUMS 2014
Biology
Variation and Genetics
Elimination Tool:

A) Back cross

B) Test cross

C) Reverse cross

D) None of the above

62 / 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

63 / 100

Category: Biology

Which valve action results from an increase in pressure in the ventricles of the heart?

NUMS Mock 3
Biology
Transport

A) The closing of all the heart valves

B) The closing of semilunar valves

C) The opening of the bicuspid valve

D) The opening of the semilunar valves

64 / 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

65 / 100

Category: Biology Ch 2 Class 12

Tendon is made up of:

NUMS 2014
Biology
Support and Movement
Elimination Tool:

A) Yellow fibrous connective tissue

B) Modified white fibrous tissue

C) Areolar tissue

D) Adipose tissue

66 / 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

67 / 100

Category: Biology Ch 3 Class 12

Which of the following is not the function of the cerebrum?

NUMS 2016
Biology
Coordination and Control
Elimination Tool:

A) Voluntary digestion

B) Thinking

C) Intelligence

D) Skeletal muscles

68 / 100

Category: Biology

According to the theory of natural selection, organisms produce:

NUMS Mock 2
Biology
Evolution

A) Offspring according to the resources available

B) Offspring to create resources

C) To create resources

D) More offspring than supported

69 / 100

Category: Biology Ch 6 Class 12

Highly condensed portions of the chromatin are called:

NTS 2011
Biology
Chromosomes and DNA
Elimination Tool:

A) Euchromatin

B) Heterochromatin

C) Nucleosome

D) Super coils

70 / 100

Category: Biology Ch 13 Class 12

Which of the following is not correct for food web?

NUMS 2019 Cancelled
Biology
Man and His Environment
Elimination Tool:

A) Start with primary consumers

B) Formed from food chain

C) Stable than food chain

D) Complex with food chain

71 / 100

Category: Biology Ch 9 Class 12

Tobacco plants, resistant to a nematode, have been developed by the introduction of DNA that produces (in the host cells):

PMC Practice 11
Biology
Biotechnology
Elimination Tool:

A) Both sense and antisense RNA

B) A particular hormone

C) An antifeedant

D) A toxic protein

72 / 100

Category: Biology Ch 9 Class 12

First restriction enzyme was isolated by

Kary Mullis B

Hamilton O. Smith

Maxam Gilbert

Hamilton John

73 / 100

Category: Biology Ch 6 Class 12

Transcription is the process in which an RNA copy of the DNA sequence and coding the gene is produced with the help of an enzyme called:

PMC 2020
Biology
Chromosomes and DNA
Elimination Tool:

A) DNA polymerase

B) RNA polymerase

C) DNA transcriptase

D) RNA transcriptase

74 / 100

Category: Biology

Q.19 Sm0oth endoplasmic reticulum is abundant in which types of cells?

A. lipid metabolism

B. protein metabolism

C. glucose metabolism

D. calcium metabolism

75 / 100

Category: Biology Ch 1 Class 11

The branch of biology which deals with the study of social behavior and communal life of human beings living in any environment is called :

Environmental biology

Human biology

Both b and c

76 / 100

Category: Biology Ch 4 Class 12

Seeds are dormant in conditions of

Water scarcity

Low temperature

Harsh winters

All of these

77 / 100

Category: Biology

Q37 The muscle contraction depends on:

A. Nerve impulse

B. Energy

C. Calcium

D. All of these

78 / 100

Category: Biology Ch 10 Class 12

Mating with non-relatives is known as?

PMC Sample 2
Biology
Evolution
Elimination Tool:

A) Inbreeding

B) Outbreeding

C) Breeding

D) None of these options is correct

79 / 100

Category: Biology

Which of the following RNA sequences would be transcribed from the DNA sequence ATGGCTAGGAC?

NUMS Mock 4
Biology
Chromosomes and DNA

A) TACGGATCCTG

B) UAGCGAUCCUG

C) AUGCCUAGGAC

D) UACCGAUCCUG

80 / 100

Category: Biology Ch 10 Class 12

If allele frequency for a dominant allele is 0.4. What will be the number of heterogeneous individuals if the population is of 100 individuals with diploid traits.

NUMS 2015
Biology
Evolution
Elimination Tool:

A) 36

B) 48

C) 52

D) 74

81 / 100

Category: Biology Ch 2 Class 12

Poliomyelitis normally affects the:

NUMS 2014
Biology
Support and Movement
Elimination Tool:

A) Legs

B) Brain

C) Spinal cord

D) Both B and C

82 / 100

Category: Biology Ch 5 Class 11

Which of the following category is most general with its members lest resembling with each other than the other categries:

Species

Genus

Family

Order

83 / 100

Category: Biology Ch 3 Class 11

The following statements are about enzymes:

1. They are globular proteins

2. They can be inhibited by competitive inhibitors

3. They are formed in the smooth endoplasmic reticulum

4. There are only found attached to Plasma membranes in the cell

Which statements are correct for all enzymes?

NTS 2015 DUHS and JSMU
Biology
Enzymes
Elimination Tool:

A) 1 and 4

B) 2 and 4

C) 1 and 2

D) 1,2,3 and 4

84 / 100

Category: Biology

Q.51 Which of the following is the respiratory surface in human beings?

A. Lungs

B. Alveoli

C. Windpipe

D. alveolar duct

85 / 100

Category: Biology

Q3 Assymetrical body is a feature of phylum

A. Annelida

B. Arthropoda

C. Porifera

D. Cnidaria

86 / 100

Category: Biology Ch 9 Class 11

Which one of the following types of cell are found in secondary xylem of angiosperms?

NTS 2015 DUHS and JSMU
Biology
Kingdom Plantae
Elimination Tool:

A) Tracheids parenchyma fibres collenchyma but no vessels

B) Vessels tracheids parenchyma collenchyma but no fibres

C) Vessels tracheids fibres collenchyma but no parenchyma

D) Vessels tracheids fibres parenchyma but no collenchyma

87 / 100

Category: Biology Ch 11 Class 11

Chlorophyll molecule resemble the haem group of hemoglobin, the main difference between these two molecule is that chlorophyll has ____ ion.

NUMS 2019 Reconduct
Biology
Bioenergetics
Elimination Tool:

A) Fe2+

B) Mg2+

C) Mn2+

D) Ca2+

88 / 100

Category: Biology Ch 8 Class 12

Which traits are most likely to affect men than women?

PMC 2020
Biology
Variation and Genetics
Elimination Tool:

A) X linked recessive

B) X linked dominant

C) Autosomal dominant

D) Autosomal recessive

89 / 100

Category: Biology Ch 4 Class 11

Etioplasts found in plants are actually one of the types of:

NUMS 2015
Biology
Cell Structure and Function
Elimination Tool:

A) Chloroplasts

B) Chromoplasts

C) Leucoplasts

D) None of the given options

90 / 100

Category: Biology

Q.66 Which one of the following is a non-protein group covalently bonded to a few respiratory enzymes among others?

A. Nicotine adenine dinucleotide

B. Flavin adenine dinucleotide

C. Nicotinamide adenine dinucleotide phosphate

D. All of the above

91 / 100

Category: Biology Ch 8 Class 12

The genes which do not follow law of independent assortment

Crossed genes

Linked genes

Recessive genes

Dominant genes

92 / 100

Category: Biology Ch 14 Class 11

Identify the incorrect statement from the following:

NTS 2010
Biology
Transport
Elimination Tool:

A) Apical growth increases the length of stems and roots.

B) Xylem is situated on the outer side of the cambium ring and the phloem on the inner side.

C) Secondary growth increases the diameter of stems and roots.

D) The cells in the elongation phase don't divide.

93 / 100

Category: Biology Ch 10 Class 11

Bipinnaria is the larval form of:

NUMS 2014
Biology
Kingdom Animalia
Elimination Tool:

A) Coelenterate

B) Potychaeta

C) Echinodermata

D) Cestoda

94 / 100

Category: Biology Ch 13 Class 11

The gas-exchange portion of the human respiratory system is the:

NTS 2016 SMBBMC
Biology
Gaseous Exchange
Elimination Tool:

A) Larynx

B) Trachea

C) Bronchi

D) Alveoli

95 / 100

Category: Biology Ch 9 Class 11

What is the name of the structure of the leaf that attaches the leaf to the stem?

PMC Sample 2
Biology
Kingdom Plantae
Elimination Tool:

A) Phloem

B) Mesophyll

C) Xylem

D) Petiole

96 / 100

Category: Biology Ch 2 Class 11

Ptyalin can convert starch into:

NUMS 2015
Biology
Biological Molecules
Elimination Tool:

A) Monosaccharide form

B) Oligosaccharide form

C) Polysaccharide form

D) All given options

97 / 100

Category: Biology Ch 1 Class 12

The excretory product that requires minimum water for its elimination compared to others is:

NUMS 2017
Biology
Homeostasis
Elimination Tool:

A) Creatinine

B) Ammonia

C) Urea

D) Uric Acid

98 / 100

Category: Biology

The thick filaments, in a myofibril of muscles, are made of ________.

NUMS Mock 3
Biology
Support and Movement

A) Myoglobin

B) Myosin

C) Actin

D) Haemoglobin

99 / 100

Category: Biology Ch 9 Class 11

Antherozoids the male gamete in bryophytes are attracted towards Archegonium i.e. female sex organ by

Phototactic phenomenon

Chemotactic phenomenon

. Geotropic phenomenon

Chemotropic movement

100 / 100

Category: Biology Ch 1 Class 12

Capillaries present around the loop of Henle:

NUMS 2018
Biology
Homeostasis
Elimination Tool:

A) Vasa recta

B) Peritubular

C) Lacteals

D) Glomerulus

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