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 Ch 13 Class 11

The oxygen-binding protein present in skeletal muscles is:

NUMS 2017
Biology
Gaseous Exchange
Elimination Tool:

A) Globin

B) Glycogen

C) Myo Glycogen

D) Myoglobin

2 / 100

Category: Biology Ch 4 Class 11

Which of the following is NOT the function of cell membranes?

NTS 2018
Biology
Cell Structure and Function
Elimination Tool:

A) Protection of cytoplasm

B) Regulating the passage of different molecules

C) Protein synthesis

D) Cellular communication

3 / 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

4 / 100

Category: Biology

Q.29 A monohybrid cross yielded 3:1 in F2. What could be mode of inheritance?

A. segregation

B. independent assortment

C. Both A and B

D. none of these

5 / 100

Category: Biology Ch 1 Class 12

Reabsorption of calcium is triggered by:

NUMS 2019 Reconduct
Biology
Homeostasis
Elimination Tool:

A) Aldosterone

B) Parathormone

C) Antidiuretic

D) Vasopressin

6 / 100

Category: Biology Ch 6 Class 11

Genetic recombination in bacteria can occur through:

NUMS 2015
Biology
Kingdom Prokaryote
Elimination Tool:

A) Conjugation

B) Transformation

C) Transduction

D) All of the above

7 / 100

Category: Biology Ch 13 Class 11

______ respiration is the process by which cell utilized oxygen and produces CO2

Cellular

Organismic

Both of these

None of these

8 / 100

Category: Biology

A/An ______ is an organism that makes ATP by aerobic respiration if oxygen is present, but is capable of switching to fermentation if oxygen is absent.

NUMS Mock 4
Biology
Nutrition

A) Cellular anaerobe

B) Respiratory anaerobe

C) Obligate anaerobe

D) Facultative anaerobe

9 / 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

10 / 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

11 / 100

Category: Biology Ch 2 Class 12

In an annelids, the contraction of circular muscle results in:

Lengthening of the body.

Shortening of the body.

Widening of body

Thinning of body

12 / 100

Category: Biology

Q.10 Mating between relatives is called which of the following?

A. Ex breeding

B. Breeding

C. Inbreeding

D. Outbreeding

13 / 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

14 / 100

Category: Biology Ch 5 Class 11

First infectious disease against which effective method of prevention developed was a _______:

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

A) Bacterial disease

B) Viral disease

C) Protozoan disease

D) Viroid disease

15 / 100

Category: Biology

Which of the following transport mechanism induces conformational change in protein?

A. Simple diffusion

B. Facilitated diffusion

C. Active transport

D. Endocytosis

16 / 100

Category: Biology Ch 3 Class 11

If another molecule, having a shape very similar to the enzymes substrate, binds to its active site, it would then ____ the enzyme’s function:

NUMS 2020
Biology
Enzymes
Elimination Tool:

A) Fasten

B) Inhibit

C) Reverse

D) Decrease

17 / 100

Category: Biology Ch 12 Class 12

Development of bark in plants and skin in animals is a method for

Providing support

Protection from enemies

Reducing water loss

Helping in food production

18 / 100

Category: Biology Ch 7 Class 12

Synthesis of microtubules increases in:

UHS 2018
Biology
Cell Cycle
Elimination Tool:

A) M phase

B) S phase

C) G1 phase

D) G2 phase

19 / 100

Category: Biology Ch 6 Class 12

Which statement is correct?

Leading strand elongates away from the replication fork

Lagging strand elongates towards the replication fork

Lagging strand is constructed discontinuously.

Both a and b

20 / 100

Category: Biology Ch 10 Class 12

Analogous organs show

Convergent evolution

Divergent evolution

Straight evolution

Zig-zag evolution

21 / 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

22 / 100

Category: Biology Ch 10 Class 12

What is in q2 Hardy Weinberg equilibrium?

NTS 2019
Biology
Evolution
Elimination Tool:

A) Frequency of the dominant allele

B) Frequency of the recessive allele

C) Frequency of both alleles

D) Number of both alleles

23 / 100

Category: Biology Ch 10 Class 11

Coelom is a cavity lined by:

NUMS 2016
Biology
Kingdom Animalia
Elimination Tool:

A) Mesoderm

B) Endoderm

D) Ectoderm

C) Epiderm

24 / 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

25 / 100

Category: Biology Ch 12 Class 11

Fear of getting obese is termed as:

NUMS 2019 Cancelled
Biology
Nutrition
Elimination Tool:

A) Bulimia nervosa

B) Anorexia nervosa

C) Dyspepsia

D) Obesity

26 / 100

Category: Biology Ch 3 Class 12

Which of the following is used in brewing industry to promote malting:

Gibberellins

Cytokinins

Auxins

Abscisic Acid

27 / 100

Category: Biology Ch 3 Class 12

Which type of sensory structures carry deep pressure and vibration sensations?

Hair end organs

Meissner's Corpuscles.

Pacinian corpuscles.

none of these.

28 / 100

Category: Biology Ch 14 Class 11

The only vein in the human body carrying oxygenated blood is:

NUMS 2020
Biology
Transport
Elimination Tool:

A) Femoral

B) Pulmonary

C) Renal

D) Iliac

29 / 100

Category: Biology

Q.13 Cellulose is the major component of?

A. Primary wall

B. Secondary wall

C. Middle lamella

D. All of these

30 / 100

Category: Biology Ch 2 Class 11

Which of the following is an unsaturated fatty acid?

PMC 2020
Biology
Biological Molecules
Elimination Tool:

A) Oleic acid

B) Palmitic acid

C) Butyric acid

D) Acetic acid

31 / 100

Category: Biology Ch 1 Class 12

The disease in which patients passed urine that rapidly turned black on exposure to air is called:

NTS 2011
Biology
Homeostasis
Elimination Tool:

A) Phenylketonuria

B) Alkaptonuria

C) Sickle cell anemia

D) Hemophilia

32 / 100

Category: Biology Ch 7 Class 12

Which is a feature of malignant tumor?

Localized

Little deleterious effect

Few mitosis

Metastasize

33 / 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

34 / 100

Category: Biology Ch 2 Class 11

Specific heat of vaporization of water is:

574 Kcal/kg

674 Kcal/kg

774 Kcal/kg

874 Kcal/kg

35 / 100

Category: Biology

Which organ(s) in the male reproductive system produce gametes?

NUMS Mock 4
Biology
Reproduction

A) Vas deferens

B) Malpighian tubule system

C) Seminiferous tubules

D) Ejaculatory duct

36 / 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

37 / 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

38 / 100

Category: Biology Ch 6 Class 12

Mutations can occur in:

NUMS 2016
Biology
Chromosomes and DNA
Elimination Tool:

A) DNA

B) Protein

C) RNA

D) A and C

39 / 100

Category: Biology

Which component enters into mitochondria after glycolysis?

NUMS Mock 1
Biology
Bioenergetics

A) Pyruvate

B) Acetate

C) Oxaloacetate

D) Acetyl – CoA

40 / 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

41 / 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

42 / 100

Category: Biology Ch 8 Class 11

Fungi store surplus food in the form of

UHS 2010
Biology
Kingdom Fungi
Elimination Tool:

A) Cellulose

B) Glycogen

C) Starch

D) Both B and C

43 / 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

44 / 100

Category: Biology Ch 14 Class 11

Identify the only cells in leaf epidermis, which are NOT connected to other cells by plasmodesmata and are involved in photosynthesis.

NUMS 2019 Reconduct
Biology
Transport
Elimination Tool:

A) Epidermal cells

B) Spongy mesophyll cells

C) Guard cells

D) Palisade mesophyll cells

45 / 100

Category: Biology Ch 4 Class 11

_______ organelles are involved in the synthesis of the plant cell wall.

NUMS 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Endoplasmic reticulum

B) Golgi complex

C) Lysosomes

D) Peroxisomes

46 / 100

Category: Biology Ch 6 Class 11

Which of the following structure primarily helps in attachment of bacteria on various surfaces?

Flagella

Pili

Both of these

None of these

47 / 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

48 / 100

Category: Biology Ch 7 Class 11

Lime stone deposits are formed from

Zooflagellates

Foraminferans

Aetinopods

Apicomplexans

49 / 100

Category: Biology Ch 11 Class 11

Which of the following light is least absorbed by the plants:

Orange

Red

Blue

Green

50 / 100

Category: Biology Ch 8 Class 12

A man with blood group “A” marries a woman of blood group “B”. Both are heterozygous. What is the off-springs having phenotype “O”

Zero

25%

50%

75%

51 / 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

52 / 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

53 / 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

54 / 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

55 / 100

Category: Biology Ch 3 Class 11

Antibodies can be digested by using which of the following types of enzymes?

PMC Sample 3
Biology
Enzymes
Elimination Tool:

A) Lipase

B) Protease

C) Amylase

D) Polymerase

56 / 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

57 / 100

Category: Biology Ch 11 Class 11

Chlorophyll is insoluble in:

Carbon tetrachloride

Alcohol

Organic solvents

Water

58 / 100

Category: Biology Ch 1 Class 12

The concentration of Na ions in the body fluids is controlled by the ____ hormone.

NTS 2012
Biology
Homeostasis
Elimination Tool:

A) ADH

B) Parathormone

C) Aldosterone

D) Estrogen

59 / 100

Category: Biology

Lecithin is formed by combining phosphatidic acid with ______:

NUMS Mock 1
Biology
Biological Molecules

A) Serine

B) Choline

C) Inositol

D) Ethanolamine

60 / 100

Category: Biology Ch 2 Class 12

The process of cartilage formation is known as:

NUMS 2014
Biology
Support and Movement
Elimination Tool:

A) Chondrioblasts

B) Chondriocutosis

C) Chondrogenesis

D) None of these

61 / 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

62 / 100

Category: Biology Ch 9 Class 12

Gel electrophoresis is a technique:

PMC 2020
Biology
Biotechnology
Elimination Tool:

A) Employed by forensic scientist to assist in the identification of the individuals by their respective type of DNA

B) Collect all the genes found in one complete set of chromosome

C) Is a technique to separate different sizeds fragment of charge bearing polymers (proteins, RNA or DNA)

D) Grows single cell or a group of cells in a glass ware on artificial medium under aseptic conditions

63 / 100

Category: Biology

It is a method for rapid production of a very large number of copies of a particular fragment of DNA:

NUMS Mock 2
Biology
Biotechnology

A) Gel electrophoresis

B) Polymerase chain reaction

C) DNA extraction

D) Recombination

64 / 100

Category: Biology Ch 2 Class 11

Water acts as a universal solvent because of:

PMC 2020
Biology
Biological Molecules
Elimination Tool:

A) Heat of vaporization

B) Hydrogen bonding

C) High polarity

D) Cohesion and adhesion

65 / 100

Category: Biology Ch 4 Class 11

Resolution power of a compound microscope is

2.0 ?m

2-4 A

24 ?m

24 A

66 / 100

Category: Biology Ch 5 Class 12

Amniotic fluid in human embryo protects it from:

NUMS 2014
Biology
Growth and Development
Elimination Tool:

A) Degeneration

C) Encasement

B) Jerks

D) None of these

67 / 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

68 / 100

Category: Biology Ch 7 Class 11

In which of the following pigments major energy reserves and cell wall are like plants?

Rhodophyta

Chlorophyta

Phaeophyta

Chrysophyta

69 / 100

Category: Biology

Q.50 Which of the following hormones is essential for the production of sperms?

A. LH
B. Estrogen
C. Gonadotrophin hormones
D. Testosterone

A. LH

B. Estrogen

C. Gonadotrophin hormones

D. Testosterone

70 / 100

Category: Biology Ch 2 Class 11

Which of the following are instant sources of energy in living organisms, like glucose? Their general formula is:

NUMS 2019 Cancelled
Biology
Biological Molecules
Elimination Tool:

A) Cx(H2O)y

B) C6H12O6

C) Cx(H2O)x

D) Cx(HO)y

71 / 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

72 / 100

Category: Biology Ch 3 Class 12

Which of the following neurotransmitters function, both as neurotransmitter and hormones, decreasing our perception of pain?

PMC 2020
Biology
Coordination and Control
Elimination Tool:

A) Epinephrine

B) Serotonin

C) Dopamine

D) Endorphins

73 / 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

74 / 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

75 / 100

Category: Biology Ch 9 Class 12

Enzyme used by the Bacteria to cut the DNA of the invading Virus for its protection is:

UHS 2018
Biology
Biotechnology
Elimination Tool:

A) Restriction Exonuclease

B) Restriction Ligase

C) Restriction Endonuclease

D) DNA polymerase

76 / 100

Category: Biology

Q.40 Which of the following is true of both bacterial conjugation and meiosis?

A. Both processes produce four haploid cells

B. Both processes are a form of asexual reproduction

C. Both processes involve genetic recombination

D. None of these

77 / 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

78 / 100

Category: Biology Ch 5 Class 11

Amoeba belongs to which kingdom:

Prokaryotae

Plantae

Monera

Protista

79 / 100

Category: Biology Ch 1 Class 12

Sperms of liverworts, mosses, ferns move towards archegonia, in response to uncleic acid released by the ovum. This is an example of:

Chemotropic movement

Chemotactic movement.

Chemosastic movement

. Haptonastic movement.

80 / 100

Category: Biology Ch 12 Class 11

_____ is activated to ______ by enterokinase / enteropeptidase enzyme secreted the lining of duodenum:

NUMS 2019 Cancelled
Biology
Nutrition
Elimination Tool:

A) Pepsinogen, pepsin

B) Trypsinogen, trypsin

C) Pepsinogen, trypsin

D) Chymotrypsinogen, chymotrypsin

81 / 100

Category: Biology Ch 9 Class 11

Leaves of ……….. are used to cure cough and cold in horses.

NUMS 2015
Biology
Kingdom Plantae
Elimination Tool:

A) Glycyrrhiza glabra

B) Cassia alata

C) Bamboo

D) Both bamboo and Glycyrrhiza glabra

82 / 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

83 / 100

Category: Biology

Unpaired facial bones are:

NUMS Mock 3
Biology
Support and Movement

A) Maxilla, Zygomatic

B) Palatine, Inferior concha

C) Nasal, Lacrimal

D) Mandible, Vomer

84 / 100

Category: Biology Ch 1 Class 12

The technique used for the non-surgical removal of kidney stones is called:

NUMS 2016
Biology
Homeostasis
Elimination Tool:

A) Ultrasound

B) Lithotripsy

C) Dialysis

D) X-rays

85 / 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

86 / 100

Category: Biology Ch 4 Class 11

Who first observed and thus hypothesized that new cells are formed from previously existing living cell?

Theodor Schwann and Schleiden

Rudolph Virchows

Louis Pasteur

Both b and c

87 / 100

Category: Biology Ch 1 Class 12

Purine and pyrimidine catabolism results in production of

Creatinine

Trimethyamine oxide

Xanthine

None of these

88 / 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

89 / 100

Category: Biology Ch 3 Class 11

Reversible inhibitors form WEAK linkages with which of the following?

PMC Sample 3
Biology
Enzymes
Elimination Tool:

A) enzyme

B) reactant

C) product

D) substrate

90 / 100

Category: Biology

Q.49 Gastric secretion is stimulated by:

A. Gastrin

B. Cholecystokinin

C. Secretin

D. Pancreozymin

91 / 100

Category: Biology Ch 5 Class 12

Wood is not formed in:

NUMS 2015
Biology
Growth and Development
Elimination Tool:

A) Monocots

B) Dicots

C) Gymnosperms

D) All of given

92 / 100

Category: Biology

Booklungs serve the function of respiration in:

NUMS Mock 3
Biology
Gaseous Exchange

A) Scorpion

B) Earthworm

C) Frog

D) Cockroaches

93 / 100

Category: Biology

Some enzymes require the presence of a non protein molecule to behave catalytically. An enzyme devoid of this molecule is called a(n):

NUMS Mock 1
Biology
Enzymes

A) Holoenzyme

B) Apoenzyme

C) Coenzyme

D) Zymoenzyme

94 / 100

Category: Biology Ch 13 Class 11

Most oxygen is transported in the blood:

NUMS 2018
Biology
Gaseous Exchange
Elimination Tool:

A) In the form of bicarbonate ions.

B) Bound to albumin compounds.

C) Dissolved in the plasma.

E) Bound to hemoglobin.

95 / 100

Category: Biology Ch 7 Class 12

In gametogenesis, which resultant product is non-functional?

NTS 2019
Biology
Cell Cycle
Elimination Tool:

A) Spermatogonia

B) Oogonia

C) Polar body

D) Ovum

96 / 100

Category: Biology

Q.30 Arterial blood contains ___________of CO2/100 ml of blood:

97 / 100

Category: Biology Ch 2 Class 11

Lipids store double the amount of energy as compared to carbohydrates because of:

PMC 2020
Biology
Biological Molecules
Elimination Tool:

A) High proportion of oxygen

B) High C-O ratio

C) Low proportion of Carbon

D) High proportion of C-H

98 / 100

Category: Biology

Mutations can occur in:

NUMS Mock 4
Biology
Chromosomes and DNA

A) DNA

B) Protein

C) RNA

D) A and C

99 / 100

Category: Biology Ch 11 Class 12

Plants growing in xeric conditions are called

Spherophytes

Mesophytes

Xerophytes

Teridophytes

100 / 100

Category: Biology Ch 4 Class 12

Which of these cycles operate in human females?

PMC Sample 2
Biology
Reproduction
Elimination Tool:

A) Oestrous cycle

B) Menstrual cycle

C) Both Options A and B are correct

D) None of these options is correct

Your score is

The average score is 61%

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