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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1 / 100

Category: Biology Ch 6 Class 11

Which of the following bacteria are without a cell wall?

NUMS 2016
Biology
Kingdom Prokaryote
Elimination Tool:

A) Mycoplasma

B) Gram positive bacteria

C) Gram negative bacteria

D) Archaeo bacteria

2 / 100

Category: Biology Ch 8 Class 12

Red green colour blindness is a sex linked recessive trait. If a colour blind man marries a woman with normal vision whose father is colourblind and they have a daughter, what is the probability that she will be colourblind?

NTS 2015 SMBBMC
Biology
Variation and Genetics
Elimination Tool:

A) 0

B) 0.25

C) 0.50

D) 0.75

3 / 100

Category: Biology Ch 2 Class 12

Endoskeleton is secreted by:

Ectoderm

Endoderm

Mesoderm

All of these

4 / 100

Category: Biology Ch 11 Class 11

The end product of Glycolysis is:

NTS 2011
Biology
Bioenergetics
Elimination Tool:

A) Glucose-6-phosphate

B) Fructose-6-phosphate

C) Pyruvate

D) 3-Phosphoglycerate

5 / 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

6 / 100

Category: Biology Ch 9 Class 12

Which one of the following options is NOT an example of genetic engineering?

NTS 2019
Biology
Biotechnology
Elimination Tool:

A) Insulin-producing bacteria

B) Oil eating bacteria

C) Photosynthetic bacteria

D) Metal extracting bacteria

7 / 100

Category: Biology Ch 4 Class 12

Which of the following is an ovoviviparous animal?

PMC Sample 1
Biology
Reproduction
Elimination Tool:

A) basking shark

B) humans

C) blue shark

D) all of these

8 / 100

Category: Biology

Why do some vegetables lose water when salt is applied to them?

NUMS Mock 3
Biology
Transport

A) Due to the less negative water potential of the external environment than the cell.

B) Due to the more negative water potential of the external environment that the cell

C) . Due to the less positive water potential of the external environment than the cell

D) Due to more positive water potential of the external environment than the cell

9 / 100

Category: Biology Ch 3 Class 12

Which one of the following is common to all neurons?

PMC 2020
Biology
Coordination and Control
Elimination Tool:

A) A cell body which contains a nucleus

B) A thick myelin sheath

C) Presence of node of Ranvier

D) Presence of Schwann cells

10 / 100

Category: Biology

_________ is sometimes given by injection as an emergency treatment in cardiac arrest:

NUMS Mock 3
Biology
Coordination and Control

A) Acetylcholine

B) Dopamine

C) Serotonin

D) Epinephrine

11 / 100

Category: Biology Ch 2 Class 11

The bond formed when two or more atoms complete their electron shells by sharing electrons is called:

Ionic bond

Hydrogen bond

Covalent bond

Electrovalent bond

12 / 100

Category: Biology

Q.23 During inspiration, the diaphragm:

A. Contracts

B. Relaxes

C. Contracts and relaxes

D. None of these

13 / 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

14 / 100

Category: Biology Ch 9 Class 12

Deficiency of enzyme ______ causes combined immunodeficiency syndrome.

UHS 2018
Biology
Biotechnology
Elimination Tool:

A) Adenosine transcriptase

B) Adenosine transaminase

C) Adenosine polymerase

D) Adenosine deaminase

15 / 100

Category: Biology Ch 8 Class 12

If we cross round yellow seeded plant with green wrinkled seeded plants, what will be phenotypic ratio at F2 generation?

NUMS 2019 Cancelled
Biology
Variation and Genetics
Elimination Tool:

A) 9:3:3:1

B) 9:4:3:2

C) 3:9:3:1

D) 8:3:3:2

16 / 100

Category: Biology Ch 11 Class 11

The end product of glycolysis in anaerobic respiration is:

PMC 2020
Biology
Bioenergetics
Elimination Tool:

A) Ethanol and Carbon dioxide

B) Lactate

C) Pyruvate

D) Both A and B

17 / 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

18 / 100

Category: Biology Ch 4 Class 11

Movement of the material across the cell membrane which does not requiring expenditure of metabolic energy is called

Active transport

Passive transport

Co-transport

Counter transport

19 / 100

Category: Biology Ch 11 Class 12

All populations within an ecosystem interconnected to one another are known as

Species

Family

Community

Biomes

20 / 100

Category: Biology Ch 5 Class 11

Which of the following is derived from Latin word VENUME which means poisonous?

NUMS 2018
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Bacteria

B) Fungi

C) Virus

D) Malaria

21 / 100

Category: Biology Ch 4 Class 12

Which method is of asexual reproduction?

Sporulation

Fission

Apomixis

All of these

22 / 100

Category: Biology Ch 3 Class 11

An example of competitive inhibition of an enzyme is the inhibition of;

UHS 2019
Biology
Enzymes
Elimination Tool:

A) Succinic dehydrogenase by malonic acid

B) Cytochrome oxidase by cyanide

C) Hexokinase by glucose

D) Carbonic anhydrase by carbon dioxide

23 / 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

24 / 100

Category: Biology Ch 13 Class 11

The most important cause of many of the respiratory disorders is:

NUMS 2019 Cancelled
Biology
Gaseous Exchange
Elimination Tool:

A) Bacterial infection

B) Pollution

C) Smoking

D) Drinking

25 / 100

Category: Biology Ch 2 Class 11

Which of the following amino acids has single codon?

NUMS 2014
Biology
Biological Molecules
Elimination Tool:

A) Isoleucine

B) Tryptophan

C) Valine

D) Arginine

26 / 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

27 / 100

Category: Biology Ch 11 Class 11

Molecular formula of chlorophyll ‘a’ molecule is:

C55H72O5N4Mg

C55H70O6N4Mg

C50H72O6N4Mg

C55H70O5N4Mg

28 / 100

Category: Biology

When the concentration of the external medium is equal to the concentration of the internal medium of a cell, the situation is called:

NUMS Mock 1
Biology
Biological Molecules

A) Hypertonic

B) Hypotonic

C) Isotonic

D) Heterotonic

29 / 100

Category: Biology Ch 8 Class 11

Asexual spores of fungi are called:

NUMS 2020
Biology
Kingdom Fungi
Elimination Tool:

A) Conidiospores

B) Zygospores

C) Ascospores

D) Basidiospores

30 / 100

Category: Biology Ch 4 Class 12

Duration of menstrual cycle is how many days on average?

PMC Sample 1
Biology
Reproduction
Elimination Tool:

A) 25

B) 26

C) 27

D) 28

31 / 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

32 / 100

Category: Biology Ch 9 Class 11

Plants of this group are called ferns:

NUMS 2017
Biology
Kingdom Plantae
Elimination Tool:

A) Filicinae

B) Angiospermae

C) Gymnospermae

D) All of them

33 / 100

Category: Biology Ch 6 Class 11

Which of the following bacteria do not have flagella commonly?

Cocci

Bacilli

Streptobacilli

Vibrio

34 / 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

35 / 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

36 / 100

Category: Biology

Q.53 Which of these is the best treatment for osteoarthritis?

A. Bed rest

B. Exercise

C. Cast

D. None of these

37 / 100

Category: Biology Ch 14 Class 11

What will happen, if there is an increase in plasma albumin?

NUMS 2014
Biology
Transport
Elimination Tool:

A) Increased blood pressure

B) Increased rate of heart

C) Greater accumulation of tissue fluid

D) Decreased filtration in glomerulus

38 / 100

Category: Biology

Q.49 Another name for the sex cell is:

A. Hormone

B. Gamete

C. Zygote

D. Testicle

39 / 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

40 / 100

Category: Biology

What is the effect of enzyme DNA ligase?

NUMS Mock 2
Biology
Chromosomes and DNA

A) DNA is broken up at specific sites

B) DNA fragments are joined together

C) DNA replication occurs

D) DNA transcription occurs

41 / 100

Category: Biology

Q.30 This group of animals has three bones in the ear.

A. Reptiles

B. Mammals

C. Both reptiles and mammals

D. Birds and mammals

42 / 100

Category: Biology Ch 9 Class 11

The release of droplets of water from hydathodes is called:

PMC 2021 Tested
Biology
Kingdom Plantae
Elimination Tool:

A) Respiration

B) Guttation

C) Vaporization

D) Transportation

43 / 100

Category: Biology Ch 6 Class 11

The process of recombination in prokaryotes takes place in which of the following ways?

PMC Sample 2
Biology
Kingdom Prokaryote
Elimination Tool:

A) transformation

B) conjugation

C) transduction

D) all of these

44 / 100

Category: Biology Ch 13 Class 11

Chest cavity is bounded by ribs and muscles on the sides, while the floor of chest cavity is called:

NUMS 2019 Reconduct
Biology
Gaseous Exchange
Elimination Tool:

A) Pleura

B) Alveoli

C) Chest cage

D) Diaphragm

45 / 100

Category: Biology Ch 4 Class 12

A major constituent of contraceptive pills is:

NUMS 2016
Biology
Reproduction
Elimination Tool:

A) Estrogen

B) Progesterone

C) Prolactin

D) Testosterone

46 / 100

Category: Biology

Which of the following compounds possesses a single covalent bond between carbon and hydrogen?

NUMS Mock 4
Chemistry
Hydrocarbons

A) CH4

B) C2H2

C) C2H4

D) All of the above

47 / 100

Category: Biology

Phenylketonuria is

NUMS Mock 2
Biology
Chromosomes and DNA

A) Sex linked dominant trait

B) Sex linked recessive trait

C) Autosomal dominant trait

D) Autosomal recessive trait

48 / 100

Category: Biology Ch 9 Class 11

Ferns are included in

Psilopsida

Lycopsida

Sphenopsida

Pteropsida

49 / 100

Category: Biology Ch 1 Class 12

Which of the following fish drink large amount of sea water and excrete concentrated urine resulting in maximum salt excretion and minimal water loss?

Hagfish

Fresh water fishes

Bony fishes

None of these

50 / 100

Category: Biology Ch 7 Class 12

In plants mitotic apparatus consists of

Centriole

Centriole and asters

Centrioles, asters and spindles

Spindles only

51 / 100

Category: Biology Ch 13 Class 12

The animals that feed on organic debris from decomposing plants and animals are called:

NUMS 2018
Biology
Man and His Environment
Elimination Tool:

A) Herbivores

B) Carnivores

C) Omnivores

D) Detritivores

52 / 100

Category: Biology Ch 4 Class 12

In asexual reproduction offspring are produced by

Meiosis

Mitosis

Both a and b

None of these

53 / 100

Category: Biology Ch 13 Class 12

A lullaby is a song. No song is prose. Some proses are epics.

Conclusions:

I. Some proses are songs.

II. Some epics are lullabies.

III. Some songs are lullabies.

Which of the following is most appropriate in the above case?

a) Only II

b) Only III

c) I, II, and III are inappropriate

none

54 / 100

Category: Biology Ch 3 Class 12

Normal action potential of a neuronal cell is :

plus 50 mv

plus 60 mv

plus 70 mv

plus 80 mv

55 / 100

Category: Biology Ch 3 Class 11

Optimal temperature of enzymes present in human body is

27?C

37?C

47?C

30?C

56 / 100

Category: Biology Ch 9 Class 12

In the commercial manufacture of insulin, a human gene is inserted into which one of the following?

NTS 2013
Biology
Biotechnology
Elimination Tool:

A) A chromosome of a human cell

B) A protein molecule in a yeast cell

C) The DNA of a bacterium

D) The nucleic acid in a virus

57 / 100

Category: Biology Ch 5 Class 11

Which of the following is not true for retroviruses?

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

A) They are cuboidal in shape

B) They are enveloped by host plasma membrane

C) They have enzyme reverse transcriptase

D) All of them are not specific

58 / 100

Category: Biology Ch 6 Class 11

For respiratory metabolism, a bacterial cell membrane contains:

PMC Practice 4
Biology
Kingdom Prokaryote
Elimination Tool:

A) Proteins

B) Lipids

D) Chemicals

C) Enzymes

59 / 100

Category: Biology Ch 4 Class 11

Which of the following statement(s) is/are correct regarding a nucleus?

I.Stores wastes and other Substances

II.Contains genetic material

III.Helps in cellular transport system

IV.Control centre of the cell

NTS 2017
Biology
Cell Structure and Function
Elimination Tool:

A) I only

B) I&II

C) II & III

D) II & IV

60 / 100

Category: Biology Ch 11 Class 11

Visible light used in photosynthesis ranges from:

300 – 700 nm in wavelength

350 – 750 nm in wavelength

380 – 750 nm in wavelength

390 – 790 nm in wavelength.

61 / 100

Category: Biology

Q.66 Which of the following provides the strong evidence in support of evolution:

A. Fossil record

B. Comparative embryology

C. Comparative anatomy

D. Molecular biology

62 / 100

Category: Biology Ch 12 Class 11

Digestion of which food components starts from the oral cavity?

NUMS 2020
Biology
Nutrition
Elimination Tool:

A) Proteins

B) Fats

D) Vitamins

C) Carbohydrates

63 / 100

Category: Biology

Q.22 Pick the one which releases anticoagulant in human intestine to prevent clotting:

A. Ascaris lumbricoides

B. Ancylostoma duodenale

C. Enterobius vermicularis

D. Hirudo medicinalis

64 / 100

Category: Biology Ch 10 Class 12

Which of the following is a vestigial organ?

PMC Sample 2
Biology
Evolution
Elimination Tool:

A) Teeth

B) Nails

C) Body hair

D) Ears

65 / 100

Category: Biology Ch 9 Class 11

The part of sporophyte which is called sporangium is

Capsule

Foot

Stalk

None of these

66 / 100

Category: Biology

A person got an infection, he became ill but then he survived. What do you think which of immunity he would have developed?

NUMS Mock 1
Biology
Transport

A) Active immunity

B) Artificially induced active immunity

C) Passive immunity

D) Naturally induced active immunity

67 / 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

68 / 100

Category: Biology Ch 7 Class 12

Gametes are produced by:

PMC 2021 Tested
Biology
Cell Cycle
Elimination Tool:

A) Meiosis

B) Mitosis

C) None of these

D) Fission

69 / 100

Category: Biology

Mutations can occur in:

NUMS Mock 4
Biology
Chromosomes and DNA

A) DNA

B) Protein

C) RNA

D) A and C

70 / 100

Category: Biology Ch 13 Class 11

The air spaces may comprise upto ______ of total volume of leaf surface.

30%

20%

40%

50%

71 / 100

Category: Biology

Q.32 Lymphocytes are found in:

A. Lymph capillary

B. Lymph vessel

C. Lymph trunk

D. lymph node

72 / 100

Category: Biology Ch 5 Class 11

Viruses without nuclear envelope is called as?

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

A) icosahedral virus

B) naked virus

C) enveloped virus

D) bilayer virus

73 / 100

Category: Biology Ch 11 Class 12

Study of relationship of organisms to their environment is

Ecology

Palaentology

Geology

None of these

74 / 100

Category: Biology

Which of the following basic structural level of proteins is indicated by an association of two alpha and two beta chains in the haemoglobin molecule?

NUMS Mock 4
Biology
Biological Molecules

A) Primary structure

B) Secondary structure

C) Tertiary structure

D) Quatenary Structure

75 / 100

Category: Biology Ch 6 Class 11

Which of the following structure is not present in all the bacteria?

Cell membrane

Chromatin bodies

Ribosomes

Capsule

76 / 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+

77 / 100

Category: Biology Ch 10 Class 11

The maximum mammalian characters are present in ____

NUMS 2015
Biology
Kingdom Animalia
Elimination Tool:

A) Metatheria

B) Prototheria

D) None of the given options

C) Eutheria

78 / 100

Category: Biology Ch 2 Class 12

When the muscle is required to contract, calcium ion binds with ______ molecule and causes them to move slightly.

NUMS 2019 Cancelled
Biology
Support and Movement
Elimination Tool:

A) Actin

B) Myosin

C) Troponin

D) Tropomyosin

79 / 100

Category: Biology Ch 8 Class 12

Two animals are mated. One is homozygous dominant for one character and homozygous recessive for another. The other animal Is heterozygous for both characters. How many phenotypes are expected in the offspring of this cross?

NTS 2016 DUHS & JSMU
Biology
Variation and Genetics
Elimination Tool:

A) 1

B) 2

C) 3

D) 4

80 / 100

Category: Biology Ch 1 Class 12

In comparison to a constantly changing external environment, _____ is when the body maintains the internal processes to work in a narrow range of internal fluctuations.

NUMS 2019 Reconduct
Biology
Homeostasis
Elimination Tool:

A) Regulation

B) Homeostasis

C) Balancing

D) Thermoregulation

81 / 100

Category: Biology

Q.64 Which of the following conditions is not required to be true for a population in Hardy-Veinberg equilibrium?

A. Random mutation

B. Large population

C. No natural selection

D. Random mating

82 / 100

Category: Biology Ch 6 Class 12

DNA has a helical shape with the diameter of

3 nm

4 nm

2 nm

5 nm

83 / 100

Category: Biology Ch 14 Class 11

Anti-bodies are produced by:

NUMS 2014
Biology
Transport
Elimination Tool:

A) Red blood cells

B) Platelets

C) B-lymphocytes

D) Hormones

84 / 100

Category: Biology Ch 7 Class 12

Which of the following cells does not enter G0 phase?

NUMS 2020
Biology
Cell Cycle
Elimination Tool:

A) Nerve cells

B) Cells of cornea

C) Cells of lens

D) None of these

85 / 100

Category: Biology Ch 12 Class 11

Food is assimilated into the body from digestive tract in:

NUMS 2014
Biology
Nutrition
Elimination Tool:

A) Esophagus

B) Stomach

C) Small intestine

D) Rectum

86 / 100

Category: Biology Ch 12 Class 12

Desert ecosystem of Mianwali is

Thar

Thal

Cholistan

None

87 / 100

Category: Biology Ch 1 Class 11

Different species of plants and animals living in the same habitat is called :

Population

Community

Biome

88 / 100

Category: Biology Ch 13 Class 12

In a forest, there are a lot of plants; trees, shrubs, and herbs. What will the Palm trees face if they grow in the same forest?

NTS 2019
Biology
Man and His Environment
Elimination Tool:

A) Intraspecific competition.

B) Interspecific competition

C) Environmental competition

D) All of the above

89 / 100

Category: Biology Ch 12 Class 11

Which type of mucosa cells secrete pepsinogen?

NUMS 2014
Biology
Nutrition
Elimination Tool:

A) Zymogen

B) Oxyntic

C) Mucous

D) Gastric

90 / 100

Category: Biology Ch 12 Class 11

Absorption of digested food occurs mainly in:

NUMS 2014
Biology
Nutrition
Elimination Tool:

A) Colon

B) Small intestine

C) Large intestine

D) Stomach

91 / 100

Category: Biology Ch 10 Class 12

Inheritance of acquired characteristics is based on:

NTS 2016 DUHS & JSMU
Biology
Evolution
Elimination Tool:

A) Genetic role in reproduction

B) Use and disuse of organ

C) Survival of the fittest

D) Mutations

92 / 100

Category: Biology Ch 9 Class 12

The Plasmid pBR322 has antibiotic resistance genes for:

UHS 2019
Biology
Biotechnology
Elimination Tool:

A) Streptomycin

B) Ampicillin and Tetracycline

C) Tetracycline and mxycycline

D) Ampicillin

93 / 100

Category: Biology Ch 4 Class 11

DNA is found in which of the following structures?

NUMS 2016
Biology
Cell Structure and Function
Elimination Tool:

A) Golgi complex

B) Lysosomes

C) Mitochondria

D) Ribosomes

94 / 100

Category: Biology

Which of these is not a reflex action?

NUMS Mock 3
Biology
Coordination and Control

A) Secretion of sweat.

B) Salivation.

C) Flexion due to needle prick.

D) Blinking of eyes due to strong light.

95 / 100

Category: Biology Ch 5 Class 11

Organisms of which of the following kingdom have absorptive mode of nutrition:

Prokaryotae

Protoctista

Animalia

Fungi

96 / 100

Category: Biology Ch 12 Class 11

A psychological condition usually seen in girls and young women, with loss of appetite is:

NTS 2011
Biology
Nutrition
Elimination Tool:

A) Obesity

B) Malnutrition

C) Anorexia Nervosa

D) Dyspepsia

97 / 100

Category: Biology Ch 4 Class 11

Fibers of the extracellular matrix are attached to ______ in the plasma membrane:

NUMS 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Phospholipids

B) Carbohydrates

C) Glycolipids

D) Proteins

98 / 100

Category: Biology

Q.35 Ribose is a monosaccharide constituent of man

A. Enzymes

B. Coenzymes

C. Vitamin

D. Antibiotics

99 / 100

Category: Biology Ch 3 Class 11

Which statement about enzyme is incorrect:

Some of them consist solely of protein with no non protein part.

They catalyze a chemical reaction without being utilized.

All enzymes are fibrous Proteins.

They without their cofactor are called apoenzyme.

100 / 100

Category: Biology Ch 9 Class 12

Which of the following is NOT true for genes used in recombinant DNA technology?

NUMS 2019 Reconduct
Biology
Biotechnology
Elimination Tool:

A) It can isolated from chromosome

B) It can be synthesized chemically

C) It can be made from protein

D) It can be made from mRNA

Your score is

The average score is 61%

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