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.36 Parkinson’s disease is caused by cell death, which produces ____________.

A. Acetylcholine

B. Serotonin

C. Dopamine

D. Adrenaline

2 / 100

Category: Biology Ch 10 Class 11

Which one of the following is a fish?

NTS 2012
Biology
Kingdom Animalia
Elimination Tool:

A) Flying fish

B) Salmon

C) Sea horse

D) All of the above

3 / 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

4 / 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

5 / 100

Category: Biology Ch 2 Class 11

Most simple amino acid is:

NUMS 2019 Cancelled
Biology
Biological Molecules
Elimination Tool:

A) Alanine

B) Valine

D) Lycine

C) Glycine

6 / 100

Category: Biology Ch 10 Class 11

Pseudocoelem develops from

Blastopore

Plastoquinone

Blastocoel

Splitting of mesoderm

7 / 100

Category: Biology

Q.13 Cellulose is the major component of?

A. Primary wall

B. Secondary wall

C. Middle lamella

D. All of these

8 / 100

Category: Biology

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

A. Vector

B. Capsid

C. Plasmid

D. Genome

9 / 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

10 / 100

Category: Biology

Q.62 Which of the following is not a sterilization method for the control of bacteria?

A. Radiation

B. Filtration

C. High temperature

D. Antiseptics

11 / 100

Category: Biology Ch 11 Class 11

Exposure to ______ light is effective in photosynthesis as it enables guard cells to take up K+ and opening of stomata.

NUMS 2019 Reconduct
Biology
Bioenergetics
Elimination Tool:

A) Red

B) Blue

C) Green

D) Orange

12 / 100

Category: Biology

Arrange the following according to the level of protein structures:

a) lysozyme, b) haemoglobin, c) insulin, d) hairs.

NUMS Mock 4
Biology
Biological Molecules

A) c, d, a, b

B) a, b, c, d

C) d, c, b, a

D) a, d, c, b

13 / 100

Category: Biology Ch 7 Class 12

Reverse of prophase is

Interphase

Metaphase

Anaphase

Telophase

14 / 100

Category: Biology

Q.50 How does each photoexcited electron pass from PS1 to PS2?

A. ETC

B. chemiosmosis

C. photolysis

D. photosynthesis

15 / 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

16 / 100

Category: Biology

Which of the following, which is the incorrectly paired one?

NUMS Mock 2
Biology
Biology and its Major Fields of Specialization

B) Schlelden and schwann … cell theory

C) Robert Brown… nucleus

D) Watson and Crick … DNA model

E) Virchow… mosaic model of plasma membrane

17 / 100

Category: Biology Ch 6 Class 12

Part of the amino acid sequences In normal and sickle cell hemoglobin are shown.

Normal haemoglobin

Thr – pro – glu – glu

Sickle cell haemoglobin

thr – pro – val – glu

mRNA codons for these amino acids are

Glutamine (glu) GAA GAG

Threonine (thr) ACU ACC

Proline (pro) CCU CCC

Valine (val) GUA GUG

Which transfer RNA molecule is Involved in the formation of this part of the sickle cell haemoglobin?

NTS 2016 DUHS & JSMU
Biology
Chromosomes and DNA
Elimination Tool:

A) GUG

B) CAU

C) UGC

D) GAG

18 / 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

19 / 100

Category: Biology Ch 8 Class 11

Those fungi which can grow only on their living host and cannot be grown on available defined growth culture medium e.g. various mildews and most rust species are called?

PMC Sample 2
Biology
Kingdom Fungi
Elimination Tool:

A) Parasitic fungi

B) Facultative parasitic fungi

C) Obligate parasitic fungi

D) all of these

20 / 100

Category: Biology Ch 14 Class 11

The only vein in human carrying oxygenated blood is:

PMC 2020
Biology
Transport
Elimination Tool:

A) Femoral

B) Pulmonary

C) Real

D) Iliac

21 / 100

Category: Biology Ch 8 Class 11

Which one of the following is different from all the rest regarding the number of cells inits body?

Rusts

Mushrooms

Molds

Yeasts

22 / 100

Category: Biology Ch 3 Class 12

All of the following hormones are secreted from anterior lobe of pituitary gland BUT:

NUMS 2019 Reconduct
Biology
Coordination and Control
Elimination Tool:

A) Somatotropin hormone

B) Thyroid stimulating hormone

C) Antidiuretic hormone

D) Gonadotrophic hormone

23 / 100

Category: Biology Ch 10 Class 12

Lamarck is best known for his theory of:

NUMS 2016
Biology
Evolution
Elimination Tool:

A) Inheritances

B) Dominance

C) Inheritance of acquired characteristics

D) All of the above

24 / 100

Category: Biology

Q.6 The uterus of the female reproductive system opens into the?

A. placenta

B. birth canal

C. cervix

D. all of these

25 / 100

Category: Biology Ch 8 Class 12

A pea plant has purple colored flowers (dominant trait). To check the genotype, which of the following cross is performed

NUMS 2018
Biology
Variation and Genetics
Elimination Tool:

A) Test cross with homozygous white flowered plant

B) Test cross with homozygous purple flowered plant

C) Test cross with heterozygous purple flowered plant

D) Hybird cross

26 / 100

Category: Biology

Q.37 Which of the following neuron has a single long dendron?

A. Sensory neurons

B. Motor neurons

C. Inter neurons

D. Efferent neurons

27 / 100

Category: Biology Ch 10 Class 11

Of the following which one is not the characteristic of Kingdom Animalia.

All animals are ingestive heterotrophs

All animals are eukaryotes

All animals develop from the dissimilar gametes i.e. large sperm and small egg.

It is largest kingdom

28 / 100

Category: Biology Ch 8 Class 11

Saccharomyces cerevisiae is the scientific name of a:

NUMS 2017
Biology
Kingdom Fungi
Elimination Tool:

A) Fungus

B) Smut

C) Bacterium

D) Yeast

29 / 100

Category: Biology Ch 7 Class 11

Symptoms of malaria occur specifically due to the formation of:

NUMS 2015
Biology
Kingdom Protista
Elimination Tool:

A) Sporozoite

B) Merozoite

C) Gametocyte

D) Oocyte

30 / 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

31 / 100

Category: Biology

Among the following, which cellular organelle contains circular DNA, similar to those found in bacteria?

NUMS Mock 1
Biology
Cell Structure and Function

A) Lysosome

B) Nucleus

C) Nucleosome

D) Mitochondria

32 / 100

Category: Biology Ch 12 Class 12

Mountains of Koh Hindukush come under

Tundra

Grass land

Tropical forests

Temperate deciduous

33 / 100

Category: Biology

Q.27 During which of the following levels of biological organization can natural selection occur?

A. Gene

B. Individual

C. Group

D. All of these

34 / 100

Category: Biology Ch 1 Class 11

In animals coordination is achieved by means of

Respiratory system

Nervous system

Endocrine system

Both b and c

35 / 100

Category: Biology Ch 2 Class 12

Joints found at the vertebrates are:

NTS 2014
Biology
Support and Movement
Elimination Tool:

A) gliding joints

C) partially moveable joints

B) sliding joints

D) fixed joints

36 / 100

Category: Biology Ch 3 Class 11

A three dimensional dcavity bearing a specific charge by which the enzyme reacts with its substrate is called

Active site

Binding site

Catalytic site

Allosteric site

37 / 100

Category: Biology

Q.17 Final acceptor of electrons in respiratory chain is?

A. NADH

B. Cytochrome a3

C. Water

D. Oxygen

38 / 100

Category: Biology

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

NUMS Mock 2
Biology
Homeostasis

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

39 / 100

Category: Biology Ch 4 Class 11

In which type of cells, cell wall is not present?

PMC 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Plant cells

B) Fungal cells

C) Bacterial cells

D) Liver cells

40 / 100

Category: Biology Ch 7 Class 12

Smooth endoplasmic reticulum is responsible for the metabolism of:

UHS 2019
Biology
Cell Cycle
Elimination Tool:

A) Nucleic acids

B) Proteins

C) Carbohydrates

D) Lipids

41 / 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

42 / 100

Category: Biology

The element in basic structure of proteins which differentiate them from carbohydrates is?

NUMS Mock 1
Biology
Biological Molecules

A) Carbon.

B) Hydrogen.

C) Nitrogen.

D) None of these options is correct.

43 / 100

Category: Biology

Q.40 Which statement is incorrect:

A. Syphilis is caused by Treponema pallidum

B. Genital herpes produces genital soreness and ulcers

C. Syphilis affects bones, eyes and CNS

D. Gonorrhea is a viral infection

44 / 100

Category: Biology Ch 8 Class 12

The position of a gene on chromosome is called

Habitat

Position

Locus

Location

45 / 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

46 / 100

Category: Biology

The prolactin hormone, responsible for the activation of mammary glands to start producing milk, is a hormone of the:

NUMS Mock 3
Biology
Coordination and Control

A) Pituitary gland

B) Pancreas

C) Thyroid gland

D) Thymus gland

47 / 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

48 / 100

Category: Biology Ch 5 Class 12

he only promoter of Leaf’s senescence in the following plant hormones is:

PMC Practice 9
Biology
Coordination and Control
Growth and Development
Elimination Tool:

A) Gibberellins

B) Cytokinins

C) Auxins

D) Abscisic acid

49 / 100

Category: Biology

Q.22 What are T Cells and their rolelin IHV infection?

A. A type lymphocytes

B. Present in blood and work as detence systein

C.They kill the ioreign invader

D. All of these

50 / 100

Category: Biology

As an excretory organ, liver:

NUMS Mock 3
Biology
Homeostasis

A) Detoxifies many chemical poisons

B) Produces ammonia for excretion by the kidneys

C) Produces urea and uric acids from the nitrogen of amino acids

D) All of the above

51 / 100

Category: Biology Ch 4 Class 11

Which type of movement through the cell membrane is not an energy-consuming process?

NUMS 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Endocytosis

B) Exocytosis

C) Active transport

D) Osmosis

52 / 100

Category: Biology Ch 9 Class 12

A genomic library is a collection of

Bacterial clones

Bacteriophage clones

Viral clones

Both a and b

53 / 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

54 / 100

Category: Biology Ch 1 Class 12

Which of the following substances helps to concentrate urine?

NUMS 2020
Biology
Homeostasis
Elimination Tool:

A) Aldosterone

B) ADH

C) Glucosterone

D) Thyroxin

55 / 100

Category: Biology Ch 3 Class 11

If enzyme concentration is low than substrate pH and temperature values are equal to requirement then which of the following will increase rate of reaction.

increase in concentration of enzyme

increase in concentration of substrate

increase in pH

increase in temperature

56 / 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

57 / 100

Category: Biology

Q.54 Structures that were once functional in the past but no longer serve a purpose due to evolutionary adaptations and physiological changes are referred to as?

A Vestigial
B. Analogous structures
C. Homologous structures
D. None of these

A Vestigial

B. Analogous structures

C. Homologous structures

D. None of these

58 / 100

Category: Biology Ch 11 Class 12

Diverse and stable community at the end of succession is

Diverse Climax communityand stable community at the end of succession is A. Climax community B. Pioneers community C. Top community D. Stable community Answer & Explanation Answer: Option A

Pioneers community

Top community

Stable community A

59 / 100

Category: Biology Ch 4 Class 12

In sexual reproduction, plants have diplohaplontic life cycle with alternating

Diploid sporophyte and haploid gametophyte generations

Haploid sporophyte and diploid gametophyte generations

Diploid sporophyte and diploid gametophyte generations

Haploid sporophyte and haploid gametophyte generations

60 / 100

Category: Biology Ch 7 Class 12

Which statement is not true about phragmoplast?

Formed from vesicle originating from Golgi apparatus

Present in plants only

Formed at the end of anaphase

Centre of dividing cell

61 / 100

Category: Biology Ch 3 Class 12

Nissl’s granules are present in which part of the neuron?

Axoplasm

Myelin sheath.

Dendrite

Soma

62 / 100

Category: Biology Ch 8 Class 12

In nature, Garden pea is

Self-fertilized

Cross fertilized

Cross pollinated

None of these

63 / 100

Category: Biology Ch 13 Class 11

Which of the following correctly explains the structure of myoglobin:

NUMS 2015
Biology
Gaseous Exchange
Elimination Tool:

A) 4 polypeptide chains + 4 heme portions

B) 4 polypeptide chains + 1 heme portions

C) 1 polypeptide chains + 4 heme portions

D) 1 polypeptide chains + 1 heme portions

64 / 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

65 / 100

Category: Biology Ch 8 Class 11

Lichen is a symbiotic mutualistic association of fungi with

Autotrophs

Roots of vascular plants

Green algae and cyanobacterium

Leguminous plants

66 / 100

Category: Biology Ch 9 Class 11

Which of the following is included in Bryophytes?

NTS 2011
Biology
Kingdom Plantae
Elimination Tool:

A) Mosses

B) Club mosses

C) Ferns

D) Seed plants

67 / 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

68 / 100

Category: Biology Ch 10 Class 11

In most triploblasts after embryonic development the three layers are represented as

Separate layers of cells

Structures formed from them

Structures associated with them

Their functions in body

69 / 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

70 / 100

Category: Biology Ch 6 Class 11

Coccobacillus has a shape similar to

Diplobacillus

Sarcina

Egg

None of these

71 / 100

Category: Biology Ch 4 Class 11

Strengthening material of prokaryotic cell wall is

Cellulose

Chitin

Inorganic salts silica waxes and ligin

Peptidoglycan or Murein.

72 / 100

Category: Biology Ch 11 Class 11

At which times there is no net gaseous exchange between leaves and the atmosphere.

Day time.

Night time

Dawn & Dusk

Mid night

73 / 100

Category: Biology Ch 5 Class 11

The word virus is derived from Latin word venome meaning

Sweet fluid

Sore Fluid

Poisonous Fluid

Salty Fluid

74 / 100

Category: Biology

This theory says that “mitochondria and chloroplasts are, in effect, ancient bacteria which now live inside the larger cells”:

NUMS Mock 2
Biology
Evolution

A) Darwin’s theory of evolution

B) Lamarckism

C) Neo – darwinism

D) Endosymbiont theory

75 / 100

Category: Biology Ch 10 Class 11

Which of the following is a freshwater sponge?

NUMS 2016
Biology
Kingdom Animalia
Elimination Tool:

A) Sycon

B) Leucosolenia

C) Euplectella

D) Spongilla

76 / 100

Category: Biology Ch 12 Class 11

Deficiency of K+ causes:

Stunted growth & strong chlorosis

No electron transport chains

Premature death of leaves.

Stunted growth of roots.

77 / 100

Category: Biology Ch 1 Class 12

Which of the following fishes excrete large volume of diluted urine?

Bony Marine fishes

Fresh water fishes

Both depending upon the surrounding water

None of these

78 / 100

Category: Biology Ch 11 Class 11

Which of the following pigment is Blue- green in colour:

Chlorophyll a

. Chlorophyll b

Chlorophyll c

Chlorophyll d.

79 / 100

Category: Biology Ch 1 Class 12

The mechanism of regulation, generally between organism and its environment, of solutes and the gain and the loss of water is called

Homeostasis

Hemostasis

Osmoregualtion

Thermoregulation

80 / 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

81 / 100

Category: Biology

Q.67 What is the property of the part of a cell membrane which is in contact with external and internal environment?

A. hydrophobic

B. hydrophilic

C. neutral

D. Both A and B

82 / 100

Category: Biology Ch 12 Class 11

Puccinia is a parasitic:

Plant

Fungus

Animal

Algae

83 / 100

Category: Biology Ch 1 Class 12

In osmosis water molecules move from area of _______ to _______ through semipermeable memberane

Higher solute concentration to lower solute concentration

Lower solute concentration to higher solute concentration

Lower solvent concentration to higher solvent concentration

All of these

84 / 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

85 / 100

Category: Biology

The only possible treatment in end stage renal failure is:

NUMS Mock 3
Biology

A) Hemodialysis

B) Peritoneal dialysis

C) Lithotripsy

D) Kidney transplantation

86 / 100

Category: Biology Ch 3 Class 12

Gibberellins may be substituted for _____ light, therefore promote flowering in long day plants.

White

Red

Blue

Green

87 / 100

Category: Biology Ch 5 Class 11

Which of the following is NOT TRUE about Human Immunodeficiency virus (HIV)?

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

A) It is a retrovirus

B) It is surrounded by an envelope

C) It does not cause AIDS

D) It causes deficiency of the human immune system

88 / 100

Category: Biology Ch 3 Class 11

An enzyme increases the speed of a reaction:

NTS 2012
Biology
Enzymes
Elimination Tool:

A) by adding activation energy requirements

B) by lowering the activation energy requirements

C) by decreasing the concentration of products

D) by increasing the concentration of products

89 / 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

90 / 100

Category: Biology Ch 11 Class 12

Study of relationship of organisms to their environment is

Ecology

Palaentology

Geology

None of these

91 / 100

Category: Biology Ch 11 Class 11

In electron transport chain, ATP synthesis takes place when electrons move from:

PMC 2020
Biology
Bioenergetics
Elimination Tool:

A) Primary Electron Acceptor (PEA) to Plastoquinone (Pq)

B) Plastoquinone (Pq) to cytochromes

C) Cytochrome to Plastocyanin (Pc)

D) Plastocyanin (Pc) to Photosystem I (PS I)

92 / 100

Category: Biology Ch 4 Class 12

In parthenocarpy which levels are high in ovaries

Gibberalins

Cytokinins

Auxins

All of these

93 / 100

Category: Biology Ch 7 Class 11

In which of the following growth phases, the number of bacteria increases the most rapidly?

NTS 2018
Biology
Kingdom Protista
Elimination Tool:

A) Lag phase

B) Log phase

C) Stationary phase

D) Death / Decline phase

94 / 100

Category: Biology Ch 9 Class 12

Protoplasts are plant cells from which

. Cell walls are removed

Nucleus is removed

New organelles are added

Vacuoles are taken out

95 / 100

Category: Biology Ch 12 Class 12

In polluted lake which organisms dominate the community

Fish

Crustaceans

Phytoplanktons

Blue green algae

96 / 100

Category: Biology Ch 2 Class 12

Which of the following bones are present in the palm of the hand:

NTS 2010
Biology
Support and Movement
Elimination Tool:

A) Carpals

B) Metacarpals

C) Phalanges

D) Tarsal

97 / 100

Category: Biology Ch 6 Class 11

The first simplest oxygen producing organism:

NUMS 2016
Biology
Kingdom Prokaryote
Elimination Tool:

A) Methanogens

B) Cyanobacteria

C) Euglena

D) Spirogyra

98 / 100

Category: Biology Ch 10 Class 11

Of the following which one is not the characteristic of triploblasts.

All of them have blood vascular system

They may be coelomate pseudocoelomate or acoelomate

They are included in grade bilateria

All of them have digestive system

99 / 100

Category: Biology Ch 11 Class 12

The biosphere covers about

. 8-10 km

5-10 km

15-30 km

16-20 km

100 / 100

Category: Biology Ch 9 Class 12

Chemical nature of primers used in the PCR process is _______.

UHS 2018
Biology
Biotechnology
Elimination Tool:

A) RNA

B) Protein

C) Carbohydrate

D) DNA

Your score is

The average score is 61%

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