Biology Practice Test 4

Created by Ali Durrani

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1 / 100

Category: Biology Ch 8 Class 12

Which of the following is monohybrid cross

TT x tt

TTYy x Ttyy

Both of these

None of these

2 / 100

Category: Biology Ch 2 Class 11

Which of the following substance is most favorable to form structural component of biological membranes?

Hydrophilic Carbohydrates

Hydrophobic fats.

Both a and b

None of these

3 / 100

Category: Biology Ch 13 Class 12

In nitrogen fixation, nitrogen is converted to:

NUMS 2019 Cancelled
Biology
Man and His Environment
Elimination Tool:

A) Nitrate ions and ammonia

B) Atomic nitrogen

C) Urea

D) All of these

4 / 100

Category: Biology Ch 10 Class 12

Carolus Linnaeus was believer of

Special creation

Natural selection

Catastrophism

. Inheritance of acquired characters

5 / 100

Category: Biology Ch 1 Class 11

A structure formed by groups of similar cells organized into loose sheetsor bundles performing similar functions is called as:

An organ

An organism

A Tissue

A Cell

6 / 100

Category: Biology

Q.20 Cytochromes are electron transport intermediates containing?

A. myoglobin

B. heam

C. globulin

D. fibrin

7 / 100

Category: Biology Ch 1 Class 12

The only possible treatment in end stage renal failure is:

NUMS 2018
Biology
Homeostasis
Elimination Tool:

A) Hemodialysis

B) Peritoneal dialysis

C) Lithotripsy

D) Kidney transplantation

8 / 100

Category: Biology

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:

NUMS Mock 4
Biology
Enzymes

A) Feedback inhibitor

B) Non-competitive inhibitor

C) Allosteric modulator

D) Competitive inhibitor

9 / 100

Category: Biology Ch 2 Class 11

Human cells maintain concentration gradients across their plasma membranes, such that there is a high sodium concentration outside the cell and a high potassium concentration inside the cell.

Suppose that within the cell membrane are sodium leak channels or carrier proteins. These channels would allow sodium to:

NTS 2017
Biology
Biological Molecules
Elimination Tool:

A) move out of the cell by simple diffusion

B) move into the cell by simple diffusion

C) move out of the cell by facilitated diffusion

D) move into the cell by facilitated diffusion

10 / 100

Category: Biology Ch 3 Class 12

Cell membrane under resting conditions is impermeable to all the ions except

Na+

. K+

Cl-

PO4-2

11 / 100

Category: Biology Ch 12 Class 11

Parasites capable of living independently of its host at times is called as _______ parasite.

Obligate

Strict

Facultative

Endoparasite

12 / 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

13 / 100

Category: Biology Ch 9 Class 12

Lambda phage is

Virus

Bacterium

Plasmid

Host cell

14 / 100

Category: Biology Ch 11 Class 11

Molecular formula of chlorophyll ‘a’ molecule is:

C55H72O5N4Mg

C55H70O6N4Mg

C50H72O6N4Mg

C55H70O5N4Mg

15 / 100

Category: Biology

Q.23 Reflex action is type of

A. Voluntary action

B. Involuntary action

C. Saltatory conduction

D. None of these

16 / 100

Category: Biology Ch 7 Class 11

The nucleoid is found only in certain species of:

PMC 2021 Tested
Biology
Kingdom Protista
Elimination Tool:

A) Gram positive bacteria

B) Both gram positive and gram negative bacteria

C) Gram negative bacteria

D) All bacteria

17 / 100

Category: Biology Ch 3 Class 12

Diameter of an artery can be changed by:

NUMS 2015
Biology
Coordination and Control
Elimination Tool:

A) Nervous stimulation

B) Chemical stimulation

C) Both chemical and nervous stimulation

D) None of the given options

18 / 100

Category: Biology Ch 12 Class 11

Which of the following have both internal and external digestion?

NUMS 2016
Biology
Nutrition
Elimination Tool:

A) Hydra

B) Jelly fish

C) Cockroach

D) All of these

19 / 100

Category: Biology Ch 2 Class 11

Glucose and fructose join together through _____ to form sucrose.

NUMS 2019 Reconduct
Biology
Biological Molecules
Elimination Tool:

A) 1, 4 glycosidic linkage

B) 1, 6 glycosidic linkage

C) 1,2 glycosidic linkage

D) 1,3 glycosidic linkage

20 / 100

Category: Biology

Which of these in an aqueous solution of equal concentration has the lowest pH?

NUMS Mock 4
Chemistry
Carboxylic Acids and its Derivatives

A) Chloroethanoic acid

B) Ethanoic acid

C) Ethylamine

D) Phenol

21 / 100

Category: Biology Ch 3 Class 11

A student of chemical engineering mistakenly engulfed the toxic compound “A” which was a potent inhibitor of a certain enzyme. He was immediately brought to a hospital where the doctor injected, intravenously, substrate “B” to minimize the toxic effect of Compound A. His life was saved from serious damage. The treatment method shows that compound A was a ______ inhibitor.

UHS 2019
Biology
Enzymes
Elimination Tool:

A) Non competitive

B) Irreversible

C) Temperature sensitive

D) Competitive reversible

22 / 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

23 / 100

Category: Biology Ch 5 Class 11

Allium cepa is the scientific name of :

Onion

Amaltas

Potato

Tomato

24 / 100

Category: Biology Ch 4 Class 12

Menstrual cycle can be divided into:

NUMS 2015
Biology
Reproduction
Elimination Tool:

A) Single phase

B) Two phases

C) Three phases

D) Four phases

25 / 100

Category: Biology Ch 10 Class 12

The process that has transformed life on earth from its earliest forms to vast diversity is?

PMC Sample 3
Biology
Evolution
Elimination Tool:

A) mutation

B) evolution

C) migration

D) genetic drift

26 / 100

Category: Biology Ch 3 Class 12

Which of the following statement about neuron is incorrect?

They not only conduct impulses but also generate them.

They are not the only cellular component of nervous system.

They may show limited regenerative capabilities.

Like all the living cell, when they mature and divide to form similar cells.

27 / 100

Category: Biology

Hepatic and Pancreatic secretions are also stimulated by a hormone called:

NUMS Mock 4
Biology
Coordination and Control

A) Gastrin

B) Secretin

C) Glucagon

D) Insulin

28 / 100

Category: Biology Ch 9 Class 11

Brassica and rosa plant belong to the group of plants:

NUMS 2017
Biology
Kingdom Plantae
Elimination Tool:

A) Hydrophytes

B) Mesophytes

C) Xerophytes

D) Succulent

29 / 100

Category: Biology Ch 7 Class 12

From each pair of centrioles ________ sets of microtubules originate

2

3

4

5

30 / 100

Category: Biology Ch 5 Class 11

Which of the following are composed of proteins only which contain the information that codes for their own replication?

NUMS 2019 Reconduct
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Virus

B) Virion

C) Prions

D) Capsule

31 / 100

Category: Biology Ch 7 Class 11

Which of the following is divided by fission?

NTS 2018
Biology
Kingdom Protista
Elimination Tool:

A) Viruses

B) Viroids

C) Bacteria

D) Fungus

32 / 100

Category: Biology Ch 6 Class 12

An anticodon is the sequence of the nitrogenous bases on the:

NTS 2014
Biology
Chromosomes and DNA
Elimination Tool:

A) complementary strand of DNA which codes for one amino acid

B) complementary strand of mRNA which codes for one amino acid

C) tRNA molecule where the amino acid is attached

D) tRNA molecule which recognizes the appropriate sequence of bases on the mRNA

33 / 100

Category: Biology Ch 5 Class 11

It is very stable and allows viruses to exist in water, air, and the ground.

PMC Sample 1
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Nucleoproteins

B) Nucleocapsid

C) Tail of virus

D) Capsid

34 / 100

Category: Biology Ch 1 Class 12

In humans, the temperature regulation control center is located in:

PMC 2020
Biology
Homeostasis
Elimination Tool:

A) Kidneys

B) Brain

C) Lungs

D) Liver

35 / 100

Category: Biology Ch 7 Class 11

Which type of chlorophyll is found in all types of algae?

NUMS 2015
Biology
Kingdom Protista
Elimination Tool:

A) Chlorophyll a

B) Chlorophyll b

C) Chlorophyll c

D) Chlorophyll d

36 / 100

Category: Biology Ch 4 Class 12

Which disorder among the following CANNOT be detected by amniocentesis?..

NTS 2019
Biology
Reproduction
Elimination Tool:

A) Haemophilia

B) Heart defects

D) Cystic fibrosis

C) Tay-Sachs disease

37 / 100

Category: Biology Ch 4 Class 12

Egg-laying mammals are called:

NUMS 2016
Biology
Reproduction
Elimination Tool:

A) Prototheria

B) Protozoa

C) Chordata

D) Monotremes

E) Both A and D

38 / 100

Category: Biology

An enzyme that helps in the conversion of RNA to DNA is called:

NUMS Mock 3
Biology
Chromosomes and DNA

A) Transcriptase

B) Polymerase

C) Reverse transcriptase

D) Synthetase

39 / 100

Category: Biology Ch 8 Class 12

Read the passage below to answer the question:

Hemophilia is a disorder in which blood fails to clot. Saad, a male hemophiliac, marries Sara, a normal woman and together they have four children, two boys (Ahmed and Ali) and two girls (Alia and Ayesha). None of the children display the symptoms of Hemophilia. Ahmed, Ali, Ayesha, and Ali all marry normal individuals and have children. None of Ahmeds or Ali’s children, male or female, display symptoms of hemophilia, but the sons of Alia and Ayesha display symptoms of hemophilia while the daughters of Alia and Ayesha do not.

Which of the following individuals are heterozygous for hemophilia:

NTS 2010
Biology
Variation and Genetics
Elimination Tool:

A) Saad, Ahmed, and Ali

B) Ahmed, Ali, Alia, and Ayesha

C) Saad and Sara

D) Alia and Ayesha

40 / 100

Category: Biology Ch 9 Class 11

The part of sporophyte which is called sporangium is

Capsule

Foot

Stalk

None of these

41 / 100

Category: Biology Ch 11 Class 11

Van neil hypothesis about the production of oxygen during phosynthesis was based on the study and investigations on

Bacteria

Algae

Protenema

Cyanobacteria

42 / 100

Category: Biology

Which one of the following is a fish?

NUMS Mock 3
Biology
Kingdom Animalia

A) Flying fish

B) Salmon

C) Sea horse

D) All of the above

43 / 100

Category: Biology Ch 5 Class 12

The best function of coelom is described as:

PMC Practice 2
Biology
Growth and Development
Elimination Tool:

A) To increase the size of the animals

B) To help in the functioning of the reproductive system

C) To provide space for the development of organs and systems

D) All of these options are correct

44 / 100

Category: Biology

Q.26 The function/s of HCl during digestion is/are:

A. Adjust the pH

B. Softens the food

C. Activate pepsinogen to pepsin

D. All A, B, C

45 / 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

46 / 100

Category: Biology Ch 9 Class 12

Which one of the following is made up of radioactively labelled nucleotides?

UHS 2015
Biology
Biotechnology
Elimination Tool:

A) Phage DNA

B) Genomic Library

C) Recombinant DNA

D) Gene Probe

47 / 100

Category: Biology Ch 4 Class 12

Which statement is correct?

In heteromorphic generations are vegetatively dissimilar

. In isomorphic generations are vegetatively dissimilar

In isomorphic generations are vegetatively similar

Both a and c

48 / 100

Category: Biology Ch 6 Class 11

When were bacteriophages discovered by Twort?

PMC Practice 5
Biology
Kingdom Prokaryote
Elimination Tool:

A) 1915

B) 1920

D) 1820

C) 1910

49 / 100

Category: Biology

Q.42 Antibodies play important role against microorganisms and other pathogens to which type of proteins do they belong?

A. Globular

B. Functional

C. Fibrous

D. Both A and B

50 / 100

Category: Biology Ch 6 Class 11

Germ theory was presented by:

NUMS 2016
Biology
Kingdom Prokaryote
Elimination Tool:

A) Robert Koch

B) Antonie van Leeuwenhoek

C) Robert Hooke

D) Robert Brown

51 / 100

Category: Biology Ch 9 Class 12

Which one has antibiotic resistance gene for tetracycline and ampicillin?

pSC 101

pBR 322

pCR 322

None of these

52 / 100

Category: Biology Ch 4 Class 11

Lysosomes are also called:

NTS 2012
Biology
Cell Structure and Function
Elimination Tool:

A) Suicide Sacs

B) Chondriosome

C) Storage organelle

D) Dicytosome

53 / 100

Category: Biology Ch 10 Class 11

Despite the structural diversities, ____ are characterized by having a soft body protected by a calcareous shell developing from the mantle layer.

NUMS 2014
Biology
Kingdom Animalia
Elimination Tool:

A) Corals

B) Foraminiferos

C) Molluscs

D) None of these

54 / 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

55 / 100

Category: Biology

Q.5 Which statement is incorrect?

A. In short day plants red light prevents flowering

B. In long day plants for red light promotes flowering

C. Leaf unrolling occurs in grasses

D. Henbane is a short-day plant

56 / 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

57 / 100

Category: Biology Ch 1 Class 12

Vascular Cambium initially appears as actively dividing cells between:

Primary Xylem and secondary xylem.

Primary xylem and secondary phloem

Primary xylem and primary phloem

Secondary xylem and secondary phloem

58 / 100

Category: Biology

Q.9 The linkage formed when one molecule of glucose combines with one molecule of fructose is:

A. 1, 2-glycosidic linkage

B. 1, 6-glycosidic linkage

C. 1, 4-glycosidic linkage

D. 1,3-glycosidic linkage

59 / 100

Category: Biology Ch 5 Class 11

Viruses are ______ smaller than bacteria

10 – 100 times

10 – 1000 times

1000 – 10000 times

60 / 100

Category: Biology Ch 13 Class 11

Gaseous exchange in plants takes place through the:

NUMS 2020
Biology
Gaseous Exchange
Elimination Tool:

A) Stomata

B) Mesophyll

C) Endoderm

D) Xylem

61 / 100

Category: Biology Ch 3 Class 11

The structure of an enzyme is altered by:

Irreversible inhibitor

Reversible inhibitor

Competitive inhibitor

Non-competitive inhibitor

62 / 100

Category: Biology Ch 10 Class 12

Which scientist does not match his achievements

Lamarck published his theory of evolution

Lyell published principles of geology

Malthus published essay on principle of population

Cuvier published papers on inheritance

63 / 100

Category: Biology Ch 5 Class 12

Speed of growth is

Rapid throughout

Slow throughout

First slow then rapid then slow again

First rapid then slow

64 / 100

Category: Biology Ch 2 Class 11

All of the following structures are proteinous in nature except:

NUMS 2014
Biology
Biological Molecules
Elimination Tool:

A) Hooves

B) Haemoglobin

C) Enzymes

D) Steroids

65 / 100

Category: Biology Ch 9 Class 12

Transgenic organisms:

PMC 2020
Biology
Biotechnology
Elimination Tool:

A) Have a foreign gene inserted into them

B) Have an important role in the large scale production of medicinal products

C) Are considered beneficial to humans

D) All of the above

66 / 100

Category: Biology Ch 1 Class 12

Among the followings which is the most longest supportive cell?

Tracheids

Sclereids

Trachea

Collenchyma cells

67 / 100

Category: Biology

Cardiac output is increased by all of the following EXCEPT:

NUMS Mock 2
Biology
Transport

A) Hypoxia

B) Exercise

C) Sleep

D) Pregnancy

68 / 100

Category: Biology Ch 7 Class 11

Brown algae are also known as

Phaeophyta

Rhodophyta

Pyrrophyta

Chrysophyta

69 / 100

Category: Biology

If concentration time graph of a reactant indicates a constant half life, then the order reaction with respect to that reactant is:

NUMS Mock 4
Chemistry
Reaction Kinetics

A) Zero order

B) Half order

C) Second order

D) First order

70 / 100

Category: Biology Ch 12 Class 11

Ileum is about ______ long:

NTS 2010
Biology
Nutrition
Elimination Tool:

A) 3.6 centimeters

B) 3.6 mllimeters

C) 3.6 inches

D) 3.6 meters

71 / 100

Category: Biology Ch 2 Class 12

Scapula is the bone of the:

NUMS 2014
Biology
Support and Movement
Elimination Tool:

A) Skull

B) Pelvic girdle

D) Vertebral column

C) Pectoral girdle

72 / 100

Category: Biology Ch 10 Class 11

An organism appears to be a segmented worm. Upon observation, it is determined that the organism has a closed circulation, a mouth, and an anus and does not have an exoskeleton. The organism most likely belongs to the phylum:

NTS 2010
Biology
Kingdom Animalia
Elimination Tool:

A) Mollusca

B) Annelida

C) Echinodermata

D) Arthropoda

73 / 100

Category: Biology Ch 7 Class 12

_______ is the most critical phase of mitosis.

NUMS 2015
Biology
Cell Cycle
Elimination Tool:

A) Prophase

B) Telophase

C) Anaphase

D) Metaphase

74 / 100

Category: Biology Ch 4 Class 11

The basic structural framework of all types of membranes are:

NUMS 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Phospholipids

B) Glycoproteins

C) Lipoproteins

D) Nucleoproteins

75 / 100

Category: Biology

Which of the following single membranous organelle is absent in plant cells?

a. Vacuole

B. Golgi apparatus

C. Lysosomes

D. Endoplasmic reticulum

76 / 100

Category: Biology Ch 7 Class 11

Of the following which one has glassy shells?

Radiolarians

Forams

Both of these

None of these

77 / 100

Category: Biology Ch 2 Class 12

Select a sessile zooflagellate:

NUMS 2020
Biology
Support and Movement
Elimination Tool:

A) Trichonympha

B) Trypanosoma

C) Choanoflagellate

D) Euglena

78 / 100

Category: Biology

Q.16 Example of convergent evolution is

A. Forelimbs of man and bat

B. Wings of birds and insects

C. Darwin's finches

D. All of above

79 / 100

Category: Biology Ch 10 Class 11

A characteristics features of Echinoderm is:

NTS 2011
Biology
Kingdom Animalia
Elimination Tool:

A) Canal system

B) Water vascular system

C) Tracheal system

D) Blood vascular system

80 / 100

Category: Biology Ch 11 Class 11

Net yield of H2O in Photosynthesis is

1 molecule

6 molecules

3 molecules

0 molecule

81 / 100

Category: Biology Ch 10 Class 11

Coelom is lined by

Parietal mesoderm

Visceral mesoderm

Mesoderm

Both A & B

82 / 100

Category: Biology Ch 5 Class 12

Sertoli cells

Provide liquid medium to cells in testes

Provide protection and nourishment to cells

Secrete testosterone

Both a and b

83 / 100

Category: Biology

Q.8 Which of the following structure provides greater pathogenicity to the bacteria?

A. slime

B. cell wall

C. cell membrane

D. capsule

84 / 100

Category: Biology Ch 2 Class 12

Pseudopodia are:

NTS 2016 DUHS & JSMU
Biology
Support and Movement
Elimination Tool:

A) False feet developed in some unicellular organisms

B) Small hairlike structures present on the unicellular organisms

C) Long, like structures coming out of the mouth

D) Suckers which are attached to the walls of intestines

85 / 100

Category: Biology Ch 2 Class 12

Pivot joint exists between

NUMS 2014
Biology
Support and Movement
Elimination Tool:

A) Tibia and fibula

C) Humerus and scapula

B) Humerus and ulna

D) Ulna and radius

86 / 100

Category: Biology Ch 3 Class 11

Extreme change in pH results in:

Change in ionization of amino acids at the active site of the enzyme.

Change in the ionization of the substrate.

Denaturation of the enzyme

IncreaseIncrease in the reaction rate. in the reaction rate.

87 / 100

Category: Biology Ch 14 Class 11

The favourite host cells of the HIV-Virus are:

NUMS 2014
Biology
Transport
Elimination Tool:

A) Lymphocytes

B) RBCs

C) T-cells

D) B-cells

88 / 100

Category: Biology Ch 10 Class 12

There existed two varieties of female freshwater Mollusks in which some were streamlined and some had a high bulge. Over the generations, male freshwater Mollusks learned that high bulge favors more production of offspring. So they started preferring to mate with females having high bulge as compared to streamlined. Will this affect Hardy Weinberg Equilibrium in the population?

NTS 2019
Biology
Evolution
Elimination Tool:

A) No, it will not affect the Hardy Weinberg equilibrium

B) Yes, it will affect the Hardy Weinberg equilibrium

C) It will help to balance equilibrium

D) The Hardy Weinberg equilibrium doesn't apply here

89 / 100

Category: Biology Ch 12 Class 12

Productivity of an ecosystem is indicated by

Number of plants in that ecosystem

The density of that ecosystem

Consumption of carbon dioxide and evolve of oxygen

Both a and b

90 / 100

Category: Biology Ch 1 Class 11

The atoms of different elements combine with each other through ionic or covalent bonding to produce compounds this stable form is called:

An organ

Tissue

Both a and c

91 / 100

Category: Biology Ch 7 Class 11

Who first separated bacteria from other protists as a group?

John Hogg

Ernst Haeckel

Margulis and Schwartz

Herbert Copeland

92 / 100

Category: Biology Ch 5 Class 12

In multicellular plants cell division occur by

Binary fission

Conjugation

Meiosis

Mitosis

93 / 100

Category: Biology Ch 9 Class 11

Thick, waxy & leathery cuticle around leaves is present in which of the following?

PMC Sample 3
Biology
Kingdom Plantae
Elimination Tool:

A) Hydrophytes

B) Mesophytes

D) Xerophytes

C) Halophytes

94 / 100

Category: Biology Ch 13 Class 11

Number of spiracles present in cockroach is

15

10

20

30

95 / 100

Category: Biology Ch 1 Class 12

Humans maintain their body temperature within a narrow limit due to their _____ characteristics.

NUMS 2019 Cancelled
Biology
Homeostasis
Elimination Tool:

A) Ectothermic

B) Endothermic

C) Heterothermic

D) Hypothermic

96 / 100

Category: Biology Ch 10 Class 12

The total aggregate of genes in a population at any one time is called population’s

Genome

Genomic library

Genetic group

Gene pool

97 / 100

Category: Biology

Q.39 The fertilization of ovum takes place at:

A. Distal part of the oviduct

B. Proximal part of the oviduct

C. Middle part of the oviduct

D. Anywhere in the oviduct

98 / 100

Category: Biology Ch 13 Class 11

Vocal cords, which help in voice production are two thin edged fibrous bands, present in:

NUMS 2019 Cancelled
Biology
Gaseous Exchange
Elimination Tool:

A) Glottis

B) Bronchus

C) Larynx

D) Trachea

99 / 100

Category: Biology Ch 2 Class 12

Dermal and denticle scales of fishes are called:

NUMS 2015
Biology
Support and Movement
Elimination Tool:

A) Placoid scales

B) Ganoid scales

C) Ctenoid scales

D) Cycloid scales

100 / 100

Category: Biology Ch 11 Class 11

NADH produces how many ATP?

NUMS 2016
Biology
Bioenergetics
Elimination Tool:

A) 2 ATP

B) 3 ATP

C) 4 ATP

D) 6 ATP

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3 responses to “Biology Practice Test 4”