Biology Practice Test 3




Biology Practice Test 3

Biology Practice Test 3 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 genetics, evolution, ecology, biotechnology, and more, helping students improve accuracy and retention.

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Biology Practice Test 3

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1 / 100

Category: Biology Ch 3 Class 11

If the concentration of enzyme is kept constant and amount of substrate is increased a point is reached where increase in substrates concentration does not affect the reaction rate because of

2 / 100

Category: Biology Ch 8 Class 11

The stored food in fungi is usually lipid droplets of:

NUMS 2017
Biology
Kingdom Fungi
Elimination Tool:

3 / 100

Category: Biology Ch 4 Class 11

Which of the following cell organelles involved in the synthesis of cell wall and middle lamella?

PMC 2020
Biology
Cell Structure and Function
Elimination Tool:

4 / 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:

5 / 100

Category: Biology

Haploid and monoploid numbers of chromosomes of hexaploid wheat are:

NUMS Mock 4
Biology
Chromosomes and DNA

6 / 100

Category: Biology Ch 9 Class 12

Deficiency of enzyme ______ causes combined immunodeficiency syndrome.

UHS 2018
Biology
Biotechnology
Elimination Tool:

7 / 100

Category: Biology

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

NUMS Mock 1
Biology
Biological Molecules

8 / 100

Category: Biology Ch 1 Class 11

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

9 / 100

Category: Biology Ch 4 Class 12

What is critical in photoperiodism?

10 / 100

Category: Biology Ch 3 Class 11

A reaction will proceed faster if the activation energy is?

PMC Sample 1
Biology
Enzymes
Elimination Tool:

11 / 100

Category: Biology

What is the effect of enzyme DNA ligase?

NUMS Mock 2
Biology
Chromosomes and DNA

12 / 100

Category: Biology

Q.31  Due to short distance between lungs and heart, walls of right ventricle are:

13 / 100

Category: Biology

Q.25 For respiratory metabolism, bacterial cell membrane contains

14 / 100

Category: Biology Ch 2 Class 11

Which statement is true about an aqueous medium:

15 / 100

Category: Biology Ch 3 Class 12

In an experiment, the production of hormone secretin was blocked. As a result, levels of all of the following enzymes were affected EXCEPT:

NTS 2014
Biology
Coordination and Control
Elimination Tool:

16 / 100

Category: Biology Ch 7 Class 11

Of the following which one has glassy shells?

17 / 100

Category: Biology Ch 5 Class 12

When a fetus is in the uterus, what carries oxygen away from the placenta?

NTS 2013
Biology
Growth and Development
Elimination Tool:

18 / 100

Category: Biology Ch 10 Class 12

Adaptation of traits to better fill a niche is known as which of the following?

PMC Sample 3
Biology
Evolution
Elimination Tool:

19 / 100

Category: Biology Ch 12 Class 11

Stunted growth of roots is due to the deficiency of _____ in plants

20 / 100

Category: Biology Ch 11 Class 11

Chlorophyll is insoluble in:

21 / 100

Category: Biology

Q.62 Sum rays are re-radiated from the surface of earth in the form of:

22 / 100

Category: Biology Ch 2 Class 11

The branch of biology which deals with the study of chemical compounds and the chemical processes in the fliving organisms is called:

23 / 100

Category: Biology Ch 12 Class 11

The structure which prevents the entry of food particles into the respiratory passage is:

NUMS 2019 Cancelled
Biology
Nutrition
Elimination Tool:

24 / 100

Category: Biology

Egg-Laying mammals are called:

NUMS Mock 3
Biology
Reproduction

25 / 100

Category: Biology

Q.54 Which of the following elements are not found in carbohydrates?

26 / 100

Category: Biology Ch 14 Class 11

Humoral immunity is carried by a special group of cells called:

NTS 2017
Biology
Transport
Elimination Tool:

27 / 100

Category: Biology Ch 5 Class 12

Germ cells give rise to:

NTS 2012
Biology
Growth and Development
Elimination Tool:

28 / 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:

29 / 100

Category: Biology Ch 10 Class 11

In some cases the blastomere can produce complete embryo the cleavage will be

30 / 100

Category: Biology

The position of an organism in a food chain of an ecosystem called:

NUMS Mock 2
Biology
Man and His Environment

31 / 100

Category: Biology Ch 8 Class 12

A pure breeding plant with the dominant phenotype of character P and the recessive phenotype of character Q was crossed with another pure breeding plant with the recessive phenotype of chracter P and the dominant phenotype of Q. The offspring of this cross were crossed with a double homozygous recessive for P and Q and the following results were obtained:

22 were phenotypically dominant for P and recessive for Q
5 were phenotypically dominant for both P and Q
4 were phenotypically recessive for both P and Q
24 were phenotypically recessive for P and dominant for Q
Which one of the following types of Inheritance is illustrated by these results?

Biology
Variation and Genetics
NTS 2013
Elimination Tool:

32 / 100

Category: Biology Ch 8 Class 12

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

33 / 100

Category: Biology

The causes of Cyanosis include:

NUMS Mock 2
Biology
Transport

34 / 100

Category: Biology

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

35 / 100

Category: Biology Ch 3 Class 12

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

NTS 2010
Biology
Coordination and Control
Elimination Tool:

36 / 100

Category: Biology

Which of the following statements are true for mitochondria and chloroplasts?

A. ATP synthesis is seen in both
B. Outer membrane has more surface area in both
C. Circular naked DNA, RNA, and 70 ribosomes are seen in both
D. Oxidative phosphorylation occurs in both

NUMS Mock 4
Biology
Cell Structure and Function

37 / 100

Category: Biology Ch 5 Class 11

The size of smallest virus is:

38 / 100

Category: Biology

How many ml of blood is pumped by each contraction of the heart?

NUMS Mock 1
Biology
Transport

39 / 100

Category: Biology Ch 5 Class 12

Fetus is human embryo from the beginning of which of the following?

PMC Sample 2
Biology
Growth and Development
Elimination Tool:

40 / 100

Category: Biology Ch 2 Class 11

Which of the following carbohydrate is tasteless?

41 / 100

Category: Biology Ch 6 Class 11

Which of the following bacteria possesses a spherical shape?

PMC Practice 4
Biology
Kingdom Prokaryote
Elimination Tool:

42 / 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:

43 / 100

Category: Biology Ch 6 Class 11

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

44 / 100

Category: Biology

The cells which play a very important role in developing immunity are:

NUMS Mock 4
Biology
Transport

45 / 100

Category: Biology Ch 5 Class 12

_____ cells store surplus food and _____ cells produce new cells for growth and development of the plant:

NUMS 2019 Cancelled
Biology
Growth and Development
Elimination Tool:

46 / 100

Category: Biology Ch 2 Class 11

Lecithin is formed by combining phosphatidic acid with ______:

NUMS 2020
Biology
Biological Molecules
Elimination Tool:

47 / 100

Category: Biology Ch 11 Class 11

FADH2 is produced during which step of Krebs cycle?

NUMS 2015
Biology
Bioenergetics
Elimination Tool:

48 / 100

Category: Biology Ch 7 Class 12

DNA is synthesized and chromosome number is doubled in

49 / 100

Category: Biology Ch 9 Class 11

A sponge of Antarctica which is more than a meter tall is known as?

PMC Sample 3
Biology
Kingdom Plantae
Elimination Tool:

50 / 100

Category: Biology Ch 14 Class 11

75% osmotic pressure of blood is maintained by:

NUMS 2015
Biology
Transport
Elimination Tool:

51 / 100

Category: Biology Ch 3 Class 11

Malonic acid is an example of:

52 / 100

Category: Biology Ch 14 Class 11

In human heart, the left atrium receives:

PMC 2020
Biology
Transport
Elimination Tool:

53 / 100

Category: Biology Ch 9 Class 11

“Vascular System absent; gametophyte dominant, sporophyte attached to gametophyte; homosporous” are distinguishing characters of

UHS 2010
Biology
Kingdom Plantae
Elimination Tool:

54 / 100

Category: Biology Ch 10 Class 12

In the Hardy – Weinberg principle,p2 + 2pq + q2= ?

NTS 2016 SMBBMC
Biology
Evolution
Elimination Tool:

55 / 100

Category: Biology Ch 6 Class 11

Spirochaete bacterium Treponema Pallidum causes ______.

NTS 2016 SMBBMC
Biology
Kingdom Prokaryote
Elimination Tool:

56 / 100

Category: Biology Ch 11 Class 11

The main process that occurs in the dark reaction in photosynthesis is:

NTS 2010
Biology
Bioenergetics
Elimination Tool:

57 / 100

Category: Biology Ch 1 Class 12

The only possible treatment in end stage renal failure is:

NUMS 2018
Biology
Homeostasis
Elimination Tool:

58 / 100

Category: Biology Ch 3 Class 11

Most enzymes have an optimum temperature of around:

PMC 2020
Biology
Enzymes
Elimination Tool:

59 / 100

Category: Biology Ch 10 Class 11

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

60 / 100

Category: Biology Ch 6 Class 11

Tuberculosis is caused by?

NTS 2015 SMBBMC
Biology
Kingdom Prokaryote
Elimination Tool:

61 / 100

Category: Biology

What do we call the cell surface membrane of a muscle fibre?

NUMS Mock 3
Biology
Support and Movement

62 / 100

Category: Biology Ch 4 Class 12

Which of the following is correct in humans?

NUMS 2015
Biology
Reproduction
Elimination Tool:

63 / 100

Category: Biology Ch 9 Class 12

By PCR we mean:

UHS 2018
Biology
Biotechnology
Elimination Tool:

64 / 100

Category: Biology Ch 13 Class 11

There are ______ stomata per square cm of leaf surface in Tobacco plants.

65 / 100

Category: Biology Ch 8 Class 11

Constricting ring around nematode is formed by

66 / 100

Category: Biology Ch 12 Class 11

Puccinia is a parasitic:

67 / 100

Category: Biology Ch 1 Class 12

Humans are:

NUMS 2016
Biology
Homeostasis
Elimination Tool:

68 / 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:

69 / 100

Category: Biology Ch 10 Class 12

Which one is NOT a continuous trait?

NUMS 2019 Reconduct
Biology
Evolution
Elimination Tool:

70 / 100

Category: Biology Ch 12 Class 11

Which process takes place during the movement of glucose from the body fluid to the blood?

NUMS 2016
Biology
Nutrition
Elimination Tool:

71 / 100

Category: Biology Ch 11 Class 11

The process by which one molecule of Glucose splits up into molecules of Pyruvate is called:

NTS 2018
Biology
Bioenergetics
Elimination Tool:

72 / 100

Category: Biology

Q.53____________________are among smallest known virus

73 / 100

Category: Biology Ch 13 Class 12

In nitrogen fixation, nitrogen is converted to:

NUMS 2019 Cancelled
Biology
Man and His Environment
Elimination Tool:

74 / 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:

75 / 100

Category: Biology Ch 5 Class 11

Five kingdom classification was proposed by :

76 / 100

Category: Biology Ch 3 Class 12

Type of neurons found exclusively in CNS are:

77 / 100

Category: Biology Ch 14 Class 11

Autoimmune diseases act at the principle of:

NUMS 2020
Biology
Transport
Elimination Tool:

78 / 100

Category: Biology Ch 1 Class 11

Out of 92 naturally occurring chemical elements how many are considered as bio-elements:

79 / 100

Category: Biology Ch 12 Class 11

Midgut in cockroach is a short narrow tube called

80 / 100

Category: Biology Ch 11 Class 11

Which of the following statement about the head of a chlorophyll molecule is incorrect:

81 / 100

Category: Biology Ch 7 Class 12

Crossing over is an exchange of genes between _______ resulting in a mixture of parental characteristics in offspring.

NTS 2019
Biology
Cell Cycle
Elimination Tool:

82 / 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:

83 / 100

Category: Biology

Q.65 Which one of the following is the attribute of Lamarckism?

84 / 100

Category: Biology Ch 4 Class 12

Menstrual cycle can be divided into:

NUMS 2015
Biology
Reproduction
Elimination Tool:

85 / 100

Category: Biology Ch 4 Class 11

Factory of ribosomal systhesis is

86 / 100

Category: Biology Ch 7 Class 12

Asexual offsprings can be produced by:

PMC 2021 Tested
Biology
Cell Cycle
Elimination Tool:

87 / 100

Category: Biology Ch 2 Class 11

Which of the statement is not true for compounds like glycoprotein and glycolipids?

88 / 100

Category: Biology Ch 2 Class 12

Bones of the skull are joined by:

NTS 2011
Biology
Support and Movement
Elimination Tool:

89 / 100

Category: Biology Ch 8 Class 12

J. Seiler in 1914 discovered which type of sex determination in moths?

NUMS 2015
Biology
Variation and Genetics
Elimination Tool:

90 / 100

Category: Biology Ch 8 Class 12

Which of the following is monohybrid cross

91 / 100

Category: Biology Ch 1 Class 12

The water content of mammalian blood is regulated by antidiuretic hormone(ADH). In which part of the nephron does regulation occur ?

NTS 2015 SMBBMC
Biology
Homeostasis
Elimination Tool:

92 / 100

Category: Biology

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

NUMS Mock 1
Biology
Kingdom Prokaryote

93 / 100

Category: Biology Ch 3 Class 12

Which hormone is chemically a steroid?

NUMS 2020
Biology
Coordination and Control
Elimination Tool:

94 / 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.

If one of Ali’s daughters marries a normal man,what is the probability that one of their children will display symptoms of hemophilia:

NTS 2010
Biology
Variation and Genetics
Elimination Tool:

95 / 100

Category: Biology

Tails can be regenerated in:

NUMS Mock 3
Biology
Growth and Development

96 / 100

Category: Biology Ch 6 Class 12

In a typical nucleotide, the nitrogenous base is attached to _______ carbon of pentose sugar.

NTS 2010
Biology
Chromosomes and DNA
Elimination Tool:

97 / 100

Category: Biology Ch 12 Class 11

In planaria, numerous small branches which end blindly are called as 

98 / 100

Category: Biology

_______ is the storage form of carbohydrate in animals and humans which is equivalent to the _____ in plants.

NUMS Mock 3
Biology
Biological Molecules

99 / 100

Category: Biology Ch 13 Class 12

Which statement is true?

100 / 100

Category: Biology Ch 4 Class 12

Which of these cycles operate in human females?

PMC Sample 2
Biology
Reproduction
Elimination Tool:

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The average score is 59%

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Structured Practice for Best Entry Test Preparation

This topic-wise and chapter-wise practice test allows students to focus on individual biology concepts, including diagrams, processes, and conceptual questions. Regular practice enhances understanding, sharpens problem-solving skills, and builds confidence to tackle both board and competitive exam questions efficiently.

Free Resources for Best Entry Test Preparation

Students can access free Biology Practice Test 3 to systematically improve knowledge, recall, and problem-solving abilities. This test is suitable for FSC Board Exams as well as major entry tests, helping students perform better in the biology section. PLS Academy provides these resources to support students in their preparation.

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