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 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

2 / 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

3 / 100

Category: Biology Ch 13 Class 12

In oceans of tropical regions

Temperature of surface water is 40?C and 10?C at depth

Temp of surface water is 25?C and 5?C at depth

Surface water 50?C and depth 20?C

Surface water 10?C and depth 15?C

4 / 100

Category: Biology

The bacteria can cope in unfavorable condition by producing:

NUMS Mock 4
Biology
Kingdom Prokaryote

A) Mesosomes

B) Zygospores

C) Endospores

D) Hyphae

5 / 100

Category: Biology Ch 10 Class 12

Many scientists believe that one of the following is evolutionary origin(s) of animals, plants and fungi?

NTS 2013
Biology
Evolution
Elimination Tool:

A) Protists

B) Algae

C) Bacteria

D) Protozoans

6 / 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

7 / 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

8 / 100

Category: Biology Ch 9 Class 11

Red algae do not contribute towards:

PMC 2020
Biology
Kingdom Plantae
Elimination Tool:

A) Making coral reefs

B) Forming limestone deposits

C) Making fertilizers

D) Forming chalk deposits

9 / 100

Category: Biology

The secondary and tertiary consumers are also known as:

NUMS Mock 1
Biology
Ecosystem

B) Herbivores

C) Abiotic factors

D) Decomposers

E) Carnivores

10 / 100

Category: Biology Ch 5 Class 11

Other name for Kingdom monera is:

Protoctista

Prokaryotae

Archae

None of these

11 / 100

Category: Biology Ch 11 Class 11

Its membranes are the sites where sunlight energy is trapped and where glucose is formed.

Which organelle is this?

NUMS 2014
Biology
Bioenergetics
Elimination Tool:

A) Chloroplast

B) Leucoplast

C) Chromoplast

D) Cytosol

12 / 100

Category: Biology Ch 8 Class 11

Ecological role of fungi as decomposers is only paralleled by

Blue green algae

Cyanobacteria

Bacteria

Virus

13 / 100

Category: Biology Ch 10 Class 12

Which of the following concepts is attributed to Lamarck?

NUMS 2014
Biology
Evolution
Elimination Tool:

A) Struggle for existence

B) Survival of the fittest

C) Inheritance of acquired characters

D) Cells come from pre-existing cells

14 / 100

Category: Biology Ch 6 Class 11

Which of the following organelles are present in all the bacteria?

NTS 2014
Biology
Kingdom Prokaryote
Elimination Tool:

A) Mesosome

B) Golgi bodies

C) Mitochondria

D) Chloroplast

15 / 100

Category: Biology Ch 9 Class 11

In Pakistan, the furniture wood is mainly obtained from the members of family:

UHS 2010
Biology
Kingdom Plantae
Elimination Tool:

A) Rosaceae

B) Solanaceae

C) Minosaceae

D) Fabaceae

16 / 100

Category: Biology

Q.12 An enzyme without its cofactor is called.

A. Coenzyme

B. Apoenzyme

C. Holoenzyme

D. Proenzyme

17 / 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

18 / 100

Category: Biology Ch 8 Class 11

Yeast reproduces by:

PMC 2021 Tested
Biology
Kingdom Fungi
Elimination Tool:

A) Budding

B) Sperm

C) Fission

D) Conidia

19 / 100

Category: Biology Ch 7 Class 12

Crossing over occur between ____________ of homologous chromosomes:

PMC Sample 1
Biology
Cell Cycle
Elimination Tool:

A) Sister pair of chromatid

B) Sister chromatids of homologous

C) Non-sister chromatin

D) All of them

20 / 100

Category: Biology Ch 5 Class 11

First step of viral replication is:

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

A) Entry

B) Assembly

C) Uncoating

D) Adsorption or Attachment

21 / 100

Category: Biology

Below the point at which the cotyledons are attached, the embryo axis is called _______.

NUMS Mock 2
Biology
Kingdom Plantae

A) Radicle

B) Epicotyl

C) Hypocotyl

D) Coleoptile

22 / 100

Category: Biology Ch 7 Class 12

Microtubules are composed of

Action protein

Actin and myosin proteins

Sphingomyelin and tubulin

Tubulin protein and traces of RNA

23 / 100

Category: Biology

Q.20 Of the following, which one is not the characteristic of kingdom animalia:

A. All animals are ingestive heterotrophs

B. All animals are diploid

C. All animals are eukaryotes

D. All animals are developed from dissimilar haploid gametes e.g. larger sperm and small egg

24 / 100

Category: Biology Ch 12 Class 11

Plants absorb it in the form of soluble phosphates. It is present abundantly in the growing and storage organs of plants. What is it?

NTS 2012
Biology
Nutrition
Elimination Tool:

A) H2O

B) CO2

C) K

D) P

25 / 100

Category: Biology Ch 5 Class 12

Cells elongate by

Mitosis

Uptake of water

Stretching

Formation of cell wall

26 / 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

27 / 100

Category: Biology Ch 8 Class 11

Type of lichen which tightly attaches to rocks is

Parmelia

Fruticose

Foliose

Crustose

28 / 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

29 / 100

Category: Biology Ch 13 Class 11

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

PMC Sample 2
Biology
Gaseous Exchange
Elimination Tool:

A) Hydrophytes

C) Halophytes

B) Mesophytes

D) Xerophytes

30 / 100

Category: Biology Ch 6 Class 12

“Law of independent assortment” states:

PMC 2020
Biology
Chromosomes and DNA
Elimination Tool:

A) That each pair of alleles assort independently of other pairs of alleles during gamete formation

B) That alleles of each pair of contrasting trait have unequal probability to assort with the alleles of other pair

C) That the two coexisting alleles for each trait segregate (separate) from each other at meiosis so that each gamete receives only one of the two alleles

D) That pertain to inheritance of single trait (monohybrid cross)

31 / 100

Category: Biology Ch 4 Class 12

Menstruation, the shedding of the lining of the uterus (endometrium), is accompanied by:

NUMS 2019 Cancelled
Biology
Reproduction
Elimination Tool:

A) Shivering

B) Fever

C) Bleeding

D) Vomiting

32 / 100

Category: Biology

Icosahedral viruses have how many faces?

NUMS Mock 4
Biology
Variety of Life

A) 20

B) 30

C) 10

D) 40

33 / 100

Category: Biology Ch 2 Class 11

Cell wall is made up of:

NUMS 2016
Biology
Biological Molecules
Elimination Tool:

A) Cellulose

B) Cell

C) Ribosomes

D) Penicillin binding protein

34 / 100

Category: Biology Ch 12 Class 11

Secretion of pancreatic juice is stimulated by:

NUMS 2019 Cancelled
Biology
Nutrition
Elimination Tool:

A) Secretin

B) Gastrin

C) Pepsinogen

D) Both secretin and gastrin

35 / 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

36 / 100

Category: Biology Ch 2 Class 12

The plants having thick cuticle, needle like reduced leaves and sunken stomata are termed as:

NUMS 2019 Reconduct
Biology
Support and Movement
Elimination Tool:

A) Hydrophytes

B) Neophytes

C) Mesophytes

D) Xerophytes

37 / 100

Category: Biology Ch 9 Class 12

DNA polymerase enzyme for PCR is isolated from bacteria, Thermus aquaticus, because;

UHS 2019
Biology
Biotechnology
Elimination Tool:

A) It can work at high speed.

B) It can withstand high denaturation temperature.

C) It can withstand low denaturation temperature.

D) It can be used again and again.

38 / 100

Category: Biology Ch 7 Class 11

The drfinite shape to ciliates is given by

Pellicle

Penicle

Calcium

Cell wall

39 / 100

Category: Biology Ch 14 Class 11

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

PMC 2020
Biology
Transport
Elimination Tool:

A) Aorta

B) Pulmonary arteries

C) Pulmonary veins

D) Vena cava

40 / 100

Category: Biology

Q43 Which cells produce oogonia in ovary?

A. Stromal cells

B. Epithelial cells

C. Germ cells

D. Theca cells

41 / 100

Category: Biology Ch 13 Class 11

A disease caused by gradual breakdown of the thin walls of alveoli is;

UHS 2019
Biology
Gaseous Exchange
Elimination Tool:

A) Tuberculosis

B) Asthma

C) Emphysema

D) Bronchitis

42 / 100

Category: Biology

Q.5 Evaporation of water from aerial parts of plants is called:

A. ascent ofI Sap

B. deplasmolysis

C. deplasmolysis

D. none of these

43 / 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

44 / 100

Category: Biology Ch 2 Class 12

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

NUMS 2018
Biology
Support and Movement
Elimination Tool:

A) Gliding joint

B) Ball and socket joint

D) Hinge joint

C) Pivot joints

45 / 100

Category: Biology Ch 10 Class 12

Important point/s of Lamarck’s theory

Use and disuse of organs

Inheritance of acquired characters

Natural selection

Both a and b

46 / 100

Category: Biology

Which type of protein structure contains the three dimensional structure?

NUMS Mock 3
Biology
Biological Molecules

A) Primary

B) Secondary

C) Tertiary

D) Quaternary

47 / 100

Category: Biology Ch 4 Class 12

In which organism males are haploid?

PMC Sample 1
Biology
Reproduction
Elimination Tool:

A) Aphids

B) mosquito

C) butterfly

D) honey bee

48 / 100

Category: Biology Ch 8 Class 12

In birds the male is the homogametic sex. A male bird showing the recessive trait was mated with a female showing the dominant trait of a characteristic governed by a pair of alleles which are sex-linked. What is the probability that the male offspring will show the dominant trait?

NTS 2014
Biology
Variation and Genetics
Elimination Tool:

A) 0

B) 0.25

C) 0.50

E) 1.00

49 / 100

Category: Biology Ch 4 Class 12

Only one ovary is functional at a time in:

NUMS 2015
Biology
Reproduction
Elimination Tool:

A) Human

B) Eagle

C) Chicken

D) Pigeon and human

50 / 100

Category: Biology Ch 13 Class 11

The voice box leads to the trachea which is also called

PMC Practice 1
Biology
Gaseous Exchange
Elimination Tool:

A) Bronchi

B) Bronchioles

C) Windpipe

D) Alveolar duct

51 / 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

52 / 100

Category: Biology Ch 13 Class 12

Driving force for all the cycles in ecosystem is

Water

Soil

Sun

Air

53 / 100

Category: Biology

Most enzymes have an optimum temperature of around:

NUMS Mock 4
Biology
Enzymes

A) 30 C

B) 40 C

C) 50 C

D) 20 C

54 / 100

Category: Biology Ch 3 Class 12

The gland known as the “gland of emergency” is the:

NTS 2014
Biology
Coordination and Control
Elimination Tool:

A) Pituitary

B) Adrenal

C) Thyroid

D) Parathyroid

55 / 100

Category: Biology Ch 3 Class 12

Type of neurons found exclusively in CNS are:

Sensory neurons

Motor neurons

Associative neurons

None of these

56 / 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

57 / 100

Category: Biology Ch 2 Class 12

The multinucleated mass of the bone-breaking cells is called:

NUMS 2020
Biology
Support and Movement
Elimination Tool:

A) Osteoclasts

B) Osteoblasts

C) Osteogenesis

D) Osteocytes

58 / 100

Category: Biology Ch 7 Class 12

Which of the following statements concerning nucleolus is correct?

NTS 2014
Biology
Cell Cycle
Elimination Tool:

A) It disappears at the time of cell division

B) There is only one nucleolus in every cell

C) It plays important role in the synthesis of ribonucleic acid and ribosomes in prokaryotic cells

D) It helps in destroying worn-out organelles

59 / 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

60 / 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

61 / 100

Category: Biology Ch 9 Class 11

Prosopis glandulosa is the botanical name of _______.

NTS 2016 SMBBMC
Biology
Kingdom Plantae
Elimination Tool:

A) Chhui mui

B) Kikar

C) Bauble

D) Devi

62 / 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

63 / 100

Category: Biology

Which of the following diseases is sexually transmitted?

NUMS Mock 1
Biology
Bio-diversity | Variety of Life

A) Tuberculosis

B) AIDS

C) Dengue Fever

D) Cholera

64 / 100

Category: Biology

Q3 These animals show radial symmetry.

A. Chordates

B. Annelids

C. Cnidarian

D Round worms

65 / 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

66 / 100

Category: Biology Ch 5 Class 12

Microcephaly, the small sized skull is due to:

NUMS 2016
Biology
Growth and Development
Elimination Tool:

A) Nutritional causes

B) Skeleton causes

C) Hormonal causes

D) Genetic defects

67 / 100

Category: Biology Ch 10 Class 11

Pinacocytes forms ______.

NUMS 2018
Biology
Kingdom Animalia
Elimination Tool:

A) Pores

B) Ostia

C) Epidermis

D) Spongocoel

68 / 100

Category: Biology Ch 9 Class 12

The deficiency of which of the following cause severe combined immunodeficiency

PMC Sample 3
Biology
Biotechnology
Elimination Tool:

A) hypoxanthine-guanine transferase

B) xanthine oxidase

C) PRPP synthatase

D) adeninosine deaminase

69 / 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

70 / 100

Category: Biology Ch 3 Class 12

Resting membrane potential of neurons is _______, while during active membrane potential the inner membrane surface becomes more _____ than the outside.

NUMS 2019 Reconduct
Biology
Coordination and Control
Elimination Tool:

A) +70 mV ; negative

B) -70 mV ; negative

C) +70 mV ; positive

D) -70 mV ; positive

71 / 100

Category: Biology Ch 4 Class 11

70S sized ribosomes are found in the cytoplasm of:

PMC 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Algae

B) Fungi

C) Protozoans

D) Bacteria

72 / 100

Category: Biology

Q.35 Ribose is a monosaccharide constituent of man

A. Enzymes

B. Coenzymes

C. Vitamin

D. Antibiotics

73 / 100

Category: Biology Ch 1 Class 12

Rose is an example of

Hydrophytes

Mesophytes

Xerophytes

Halophytes

74 / 100

Category: Biology Ch 13 Class 12

Conversion of ammonium into nitrates is:

UHS 2018
Biology
Man and His Environment
Elimination Tool:

A) Nitrification

B) Nitrogen Fixation

C) Ammonification

D) Denitrification

75 / 100

Category: Biology Ch 13 Class 11

Water is _____ times viscous than air

1000

5000

8000

76 / 100

Category: Biology Ch 13 Class 12

Geothermal energy is

. Energy obtained from nuclear fuel

Energy obtained from burning natural fuels

Heat energy trapped underground

Energy obtained from blowing hot winds

77 / 100

Category: Biology Ch 10 Class 12

The genetic change in a population caused by natural selection is called?

PMC Sample 1
Biology
Evolution
Elimination Tool:

A) polymorphism

B) specialization

C) gene linkage

D) adaptation

78 / 100

Category: Biology Ch 3 Class 11

Which statement is incorrect about Lock and Key Model?

Specific enzyme can transform only a specific substrate

Active site of an enzyme is a non flexible structure.

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

It explains the mechanism of every chemical reaction.

79 / 100

Category: Biology Ch 6 Class 12

Genetic code is a ______ code and out of 64 codons, _____ are nonsense codons.

NUMS 2019 Reconduct
Biology
Chromosomes and DNA
Elimination Tool:

A) Single ; two

B) Single ; three

C) Triplet ; two

D) Triplet ; three

80 / 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

81 / 100

Category: Biology Ch 9 Class 12

The genetically Engineered vaccine is not available for which of the following?

PMC Practice 8
Biology
Biotechnology
Elimination Tool:

A) HAV

B) HBV

C) HCV

D) HDV

82 / 100

Category: Biology Ch 11 Class 11

C6H12O6 + 6O2 ? 6CO2 + 6H20 + ENERGY represents:

Photosynthesis

Aerobic respiration

Anaerobic respiration

Respiration

83 / 100

Category: Biology

Q.18 Pick the incorrect pair:

A. Lovastatin – Lowers blood cholesterol

B. Cyclosporine – Prevents transplant rejection

C. Ergotine -Migraine relieve

D. Griseofulvin – Inhibit bacterial growth

84 / 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

85 / 100

Category: Biology Ch 12 Class 11

Hydra is an example of _______ feeder

Fluid

Macrophagous

Fluid

All of these

86 / 100

Category: Biology Ch 3 Class 12

Which hormone is chemically a steroid?

NUMS 2020
Biology
Coordination and Control
Elimination Tool:

A) ADH

B) Thyroxin

C) Cortisone

D) Insulin

87 / 100

Category: Biology Ch 5 Class 11

Syphilis is caused by:

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

A) Coccus

B) Bacillus

C) Spirillum

D) Spirochete

88 / 100

Category: Biology Ch 7 Class 12

Interphase of meiosis lacks

G0 phase

G1 phase

G2 phase

S phase

89 / 100

Category: Biology

Which vertebrae together are called pelvic vertebrae?

NUMS Mock 2
Biology
Support and Movement

A) Coccygeal and lumbar

B) Sacral and lumbar

C) Sacral and coccygeal

D) Sacral and thoracic

90 / 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

91 / 100

Category: Biology Ch 6 Class 11

Which of the following bacteria do not have flagella commonly?

Cocci

Bacilli

Streptobacilli

Vibrio

92 / 100

Category: Biology Ch 4 Class 12

Fallopian tube in humans is important for:

NUMS 2018
Biology
Reproduction
Elimination Tool:

A) Ovulation

B) Primary oocyte

D) Ova

C) Secondary oocyte

93 / 100

Category: Biology Ch 7 Class 11

Which of the following is TRUE about Amoebae?

PMC 2020
Biology
Kingdom Protista
Elimination Tool:

A) They have flagella

B) They are multicellular

C) They do not cause any disease in humans

D) They move by forming specialized cytoplasmic projections called pseudopodia

94 / 100

Category: Biology Ch 13 Class 12

An area previously supporting life is made barren, the subsequent recolonization is called ______.

UHS 2018
Biology
Man and His Environment
Elimination Tool:

A) Climax community

B) Pioneer succession

C) Primary succession

D) Secondary succession

95 / 100

Category: Biology Ch 4 Class 11

Whone is not the function of endoplasmic reticulum?

Nerve impulse conduction

Transport of material

Mechanical support

Synthesis of conjugated molecules

96 / 100

Category: Biology Ch 7 Class 12

During anaphase, each chromosome has:

PMC 2021 Tested
Biology
Cell Cycle
Elimination Tool:

A) One chromatid

B) Two chromatids

C) Several chromatids

D) No chromatids

97 / 100

Category: Biology Ch 2 Class 12

Skeleton of arms and legs is:

NUMS 2018
Biology
Support and Movement
Elimination Tool:

A) Exoskeleton

B) Endoskeleton

C) Axial skeleton

D) Appendicular skeleton

98 / 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

99 / 100

Category: Biology Ch 7 Class 12

Microtubule subunits (for spindle fibers) are synthesized in _______ phase.

UHS 2019
Biology
Cell Cycle
Elimination Tool:

A) G1

B) M

C) G2

D) S

100 / 100

Category: Biology Ch 5 Class 12

Function of intercalary meristems is

. Increase in length

Increase in diameter

Production of leaves and flowers

None of these

Your score is

The average score is 61%

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