Whole XI Biology Mdcat Online Test-1

Instructions for Whole XI Biology Online Test Mdcat-2024:

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Test Details:

Subject: Biology
Class: 1st year or 11
Chapter name: All PMDC Syllabus Chapters
Test: MDCAT 2024
Book: Sindh Textbook
Total No. Of MCQS: 100
Time Allowed: 100 Minutes
Price: Free

3779

Created on August 11, 2024 By

medicoengineer.com

Whole XI biology Test 2024

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NameEmailPhone Number

1 / 100

1. Terpenoids are made up of _________ units which are linked by ___________linkage.

a) Isoprenoids units ; C-C Linkage

b) Glycerol and fatty acids ; C-C linkage

c) Isoprenoids units ; Ester Linkage

d) All are correct

2 / 100

2. Which of the following is found less in percentage in mammalian cell than bacterial cell?

a) DNA

b) RNA

c) Protein

d) Both A and B

3 / 100

3. Why does Water work as temperature stabilizer?

a) High Specific heat

b) It requires high amount of heat to make changes in temperature

c) Due to its Cohesive and adhesive property

d) Both A and B

e) All are correct

4 / 100

4. Why does water behave as buffer?

a) Due to its Amphoteric nature

b) High Specific heat

c) It can behave as acid or base

d) Both A and C

e) All are correct

5 / 100

5. Carbohydrates are defined as?

a) Polyhydroxy alcoholic compounds

b) Polyhydroxy carbonyl compounds

c) polyhydroxy compounds

d) All are correct

6 / 100

6. The ionic bond found between polysaccharides and oligosaccharides is known as ?

a) Glycosidic bond

b) Ester bond

c) There is no ionic bond

d) Both A and B

7 / 100

7. Tick the correct statement:

a) Both right-handed and left-handed sugars can be metabolized by enzymes in the human body.

b) Left-handed sugars have the same taste and caloric value as right-handed sugars.

c) The enzymes in the human body are specific to right-handed sugars and cannot metabolize left-handed sugars.

d) Artificial sweeteners used by diabetic patients have a high caloric value due to their inability to be metabolized.

8 / 100

8. Tick the correct statement:

a) All amino acids have different general structures but similar R groups.

b) The carboxylic acid group in amino acids functions as a base.

c) The amino group in amino acids is bonded to an asymmetric carbon, which is also known as the α-carbon.

d) Glycine is the only amino acid with a variable R group.

9 / 100

9. Enzymes ___________during the Chemical reaction.

a) Remain unchanged

b) Are changed

c) Are broken down

d) B and C

10 / 100

10. Pepsin is inactive due to?

a) Polypeptide chain at its active site

b) Absence of HCL

c) Due to low pH

d) None of above , as Pepsin is already in active form

11 / 100

11. The active form of the enzyme is called ____________.

a) Holoenzyme

b) Apo-enzyme

c) Co-enzyme

d) Both A and B

12 / 100

12. Which of the following explains the Enzyme function correctly?

a) Enzyme + product→Enzyme Substrate complex→ Enzyme Product Complex → Enzyme + Product

b) Enzyme + product→ Enzyme Product Complex → Enzyme Substrate complex→Enzyme + Product

c) Enzyme + substrate → Enzyme Substrate complex→ Enzyme Product Complex → Enzyme + Product

d) Enzyme + product→Enzyme Substrate complex→ Enzyme Product Complex → Enzyme + substrate

13 / 100

13. Lock and key model of Enzyme states that :

a) Enzyme is specific in nature

b) It works like Key and Lock , different keys can be fit in lock but only specific key will open the lock

c) Enzymes induces change in the enzyme structure

d) A and B

14 / 100

14. Enzymes catalyst the biochemical reactions by :

a) Increasing Threshold Energy

b) Increasing Activation Energy

c) Decreasing Activation Energy

d) A and B

15 / 100

15. Enzymes that act outside the cell that has secreted them are _________.

a) Endo-enzymes

b) Exo-enzymes

c) External enzymes

d) intracellular enzymes

16 / 100

16. The cell wall is ________in nature.

a) Living

b) Non-living

c) Maybe Living or no-Living

d) None of these

17 / 100

17. Match The column:

1. Bacterial cell Wall	a. Chitin
2. Fungal Cell Wall	b. Cellulose
3. Algal Cell Wall	c. Peptidoglycan

a) 1=a; 2=b ; 3=c

b) 1=b ; 2=a ; 3=c

c) 1=c ; 2=a; 3=b

d) 1=c ; 2=a; 3=c

18 / 100

18. The layer of cell wall that acts as the Cementing layer between two daughter cells is called ___________.

a) Middle Lamella

b) Primary Cell Wall

c) Secondary cell wall

d) Unit membrane

19 / 100

19. In Cell wall, at some places the deposition of Cell wall material does not takes place are known as __________.

a) Plasmodesmata

b) Stomata

c) Intrinsic Proteins

d) Vacuole

20 / 100

20. Tick the incorrect about Ribosomes:

a) Non-membranous

b) Found in Eukaryotic and prokaryotic cells

c) Protein factories

d) Found on SER

21 / 100

21. Which Cell organelle is referred as “Suicidal Sac”?

a) Vacuole

b) Nucleus

c) Lysosomes

d) Peroxisomes

22 / 100

22. Tay-Sachs disease is associated with?

a) Lysosomes

b) Peroxisomes

c) Glyoxysome

d) Ribosomes

23 / 100

23. The process of ATP formation from ADP and phosphate is called ___________.

a) Photosynthesis

b) Phosphorylation

c) Glycolysis

d) Fermentation

24 / 100

24. Which of the following processes is responsible for producing ATP using energy derived from light?

a) Oxidative Phosphorylation

b) Substrate level Phosphorylation

c) Photophosphorylation

d) Glycolysis

25 / 100

25. The empirical formula of chlorophyll-a is __________.

a) C₅₂H₇₂O₅N₄Mg

b) C₅₅H₇₆O₅N₄Mg

c) C₅₅H₇₂O₅N₄Mg

d) C₅₅H₇₀O₅N₄Mg

26 / 100

26. Final product of photosynthesis is ______.

a) Protein

b) Lipids

c) Carbohydrates

d) All of these

27 / 100

27. The light reactions of photosynthesis start from the reaction center of __________.

a) PS-II

b) P₆₈₀

c) P₇₀₀

d) A and B

28 / 100

28. Find the correct order for the stages of the Calvin cycle.

a) Regeneration → Carboxylation → Reduction

b) Carboxylation → Reduction → Regeneration

c) Reduction → Carboxylation → Regeneration

d) Carboxylation → Regeneration → Reduction

29 / 100

29. The enzymes required in glycolysis are present in:

a) Matrix of mitochondria

b) cytosol

c) Chloroplast

d) Inner mitochondrial membrane

30 / 100

30. The molecule produced in glycolysis and used in anaerobic respiration is:

a) CO2

b) Water

c) Glucose

d) Pyruvate

31 / 100

31. The shape of bacteriophage is __________.

a) Tadpole

b) Circular

c) Spherical

d) Polyhedron

32 / 100

32. HIV belongs to _________ class of viruses.

a) Retroviruses

b) Parvovirus

c) Reoviruses

d) All of Above

33 / 100

33. Which of the following is a double-stranded DNA virus with an RNA intermediate?

a) HIV

b) AIDS Causing Virus

c) Covid-19

d) Hep-B

34 / 100

34. Which of the following is a DNA virus?

a) Parvovirus

b) Reoviruses

c) Hepatitis C

d) All are DNA viruses

35 / 100

35. HIV stands for ________.

a) Human Immune Virus

b) Human Immunodeficiency Virus

c) Human Infection Virus

d) Human Inflammatory Virus

36 / 100

36. Which of the following drugs are found remarkable against HIV?

a) Rukobia

b) Descovy

c) Truvada

d) All of these

37 / 100

37. Which of the following is not a Virus?

a) Poliomyelitis

b) HIV

c) AIDs

d) Both A and C

38 / 100

38. Which of the following is comprised of just 29 amino acids and 10 disulfide bonds?

a) Prions

b) Viroids

c) Both

d) None

39 / 100

39. Which of the following bacteria is not found in Yogurt?

a) Streptococcus thermophilus

b) Lactobacillus Bulgaricus

c) E. Coli

d) A and B

40 / 100

40. Which of the following is not a Phylum of Domain Bacteria ?

a) Protobacteria

b) Cyanobacteria

c) Spirochetes

d) Treponema pallidum

e) All are phyla of Domain Bacteria

41 / 100

41. Clostridium botulinum is a ___________.

a) Gram-positive bacteria

b) Gram negative bacteria

c) Cyanobacteria

d) Chlamydias

42 / 100

42. Which of the following is present in bacteria?

a) Ribosomes

b) Nucleus

c) Nucleolus

d) Nucleoid

e) Both A and D

43 / 100

43. All bacteria have________.

a) Glycocalyx

b) Cell membrane

c) C. Genetic material

d) Both B and C

e) All of these

44 / 100

44. Tropenama pallidum is an example of ________.

a) Spirochetes

b) Vibrio

c) Cocci

d) Bacilli

45 / 100

45. Identify the type of bacteria given in the figure :

a) Peritrichous

b) Lophotrichous

c) Monotrichous

d) Atrichous

46 / 100

46. Sulphomonas bacteria oxidize _____ to generate energy.

a) Elemental Sulphur

b) H₂S

c) H₂O

d) Both A and B

47 / 100

47. Which of the following has a cellular level of organisation?

a) Porifera

b) Coelenterata

c) Nematoda

d) Platyhelminthes

48 / 100

48. In which of the following respiratory system is not found?

a) Annelids

b) Chondrichthyes

c) Osteichthyes

d) Agnatha

49 / 100

49. Which of the following is not a insectivore plant?

a) Nepthens

b) Pitcher plant

c) Dorsera Intermedia

d) All are Insectivores

50 / 100

50. What is Radula?

a) Rasping organ

b) Locomotory organ

c) Respiratory organ

d) Reproductive organ

51 / 100

51. Which of the following is exclusively marine?

a) Echinodermates

b) Arthropods

c) Vertebrates

d) Annelids

52 / 100

52. Tick the Correct about Chaetae :

a) Also called setae

b) Always without parapodia

c) Helps in Excretion

d) All are correct

53 / 100

53. Circulatory system found in annelids ?

a) Open Circulatory system

b) Closed Circulatory system

c) No Circulatory system

d) Both A and B

54 / 100

54. Eel and Sea horse are classified as _______?

a) Class bony fishes

b) Osteichthyes

c) Chondrichthyes

d) A and B

55 / 100

55. Which one of the following is not property of enzymes?

a) Proteinaceous in nature

b) Low molecular weight

c) They are Globular proteins

d) Enzymes can be Exo-enzymes and Endo-enzymes

56 / 100

56. Cell Organelles which are mainly concerned with detoxification of the alcohol?

a) Lysosomes

b) Peroxisomes

c) Glyoxysome

d) Ribosomes

57 / 100

57. Identify the type of Chromosome in the figure:

a) Telocentric

b) Acrocentric

c) Submetacentric

d) Metacentric

58 / 100

58. Identify the process given in the figure:

a) Condensation

b) Hydrolysis

c) Bond Formation

d) A and C

59 / 100

59. Which one of the following is not a Fibrous Protein?

a) Collagen

b) Keratin

c) Myosin

d) Hemoglobin

60 / 100

60. Which of the following is a Trihydroxy alcohol ?

a) Glycogen

b) Glucose

c) Glycerol

d) None

61 / 100

61. The heart wall consists of 3 layers (inside to outside):

a) Endocardium → Myocardium → Pericardium

b) Epicardium → Myocardium → Endocardium

c) Endocardium → Myocardium → Epicardium

d) Pericardium → Epicardium → Endocardium

e) None of these

62 / 100

62. Choose the correct statement regarding heart valves:

a) A flap of connective tissue which pushes blood forward

b) Blood is pumped into atria through Semilunar valves

c) Mitral valve is placed between right atria & right ventricle

d) A flap of connective tissue which prevents backflow of blood

63 / 100

63. Choose the incorrect statement regarding Electrocardiogram (ECG):

a) Depolarization of ventricles produces P-wave

b) P-R interval indicates the time required for SA node depolarization to reach ventricles

c) QRS-complex represents depolarization of ventricles

d) Ventricular repolarization produces T-wave

e) All of these

64 / 100

64. Which vessel plays a major role in determining the distribution of blood within the body?

a) Arteries

b) Veins

c) Capillaries

d) Arterioles

e) Venules

65 / 100

65. Choose the correct statement regarding Blood pressure:

a) BP is the hydrostatic force exerted on the wall of vessels

b) Change in BP is sensed by Baroreceptors within the body

c) Normal BP of the human body is 120/80 mmHg

d) All are correct (Option A, B, C)

e) None of these options

66 / 100

66. Which chamber of the heart receives oxygenated blood?

a) Right atrium from pulmonary veins

b) Left atrium from pulmonary arteries

c) Right atrium from pulmonary arteries

d) Left ventricles from pulmonary veins

e) Left atrium from pulmonary veins

67 / 100

67. Lymph vessels in the intestinal villi play a key role in the absorption of:

a) Proteins

b) Amino acids

c) Fats

d) Carbohydrates

e) No role in the absorption of nutrients

68 / 100

68. Organisms with four-chambered hearts are:

a) Mammals, reptiles, and crocodiles

b) Fishes, reptiles, and mammals

c) Birds, reptiles, mammals, and crocodiles

d) Humans, crocodiles, and birds

e) Humans, reptiles, and birds

69 / 100

69. Each lobe of human lungs is supplied by:

a) Primary bronchi

b) Trachea

c) Secondary bronchi

d) Respiratory bronchi

e) Terminal bronchi

70 / 100

70. Choose the correct statement regarding Ventilation:

a) Ventilation is the process in which air goes in and out of cells

b) Normal adults breathing rate is 12-20 times per hour

c) Ventilation consists of inspiration and expiration

d) Expiration is an active process

71 / 100

71. Choose the incorrect statement regarding human respiratory volumes:

a) Respiratory volumes are independent of gender or age

b) Normal tidal volume is 500 ml

c) Expiratory reserve volume is 1200-1500 ml

d) Residual volume is nearly 1L

e) All are correct answers

72 / 100

72. Choose the correct statement regarding Sinuses:

a) Sinuses are the air-filled cavities found in the nose

b) Frontal sinuses are located between the eyes

c) Inflammation of sinuses marks the accumulation of fluids within sinuses

d) Maxillary sinuses are connected to the mouth (oral cavity)

73 / 100

73. Pulmonary tuberculosis is caused by:

a) Mycoplasma tuberculosis

b) Mycobacterium tuberculosis

c) Mycobacterium pneumoniae

d) All of these

74 / 100

74. True statement regarding Lung cancer:

a) It is the abnormal proliferation of affected tissue in the lungs

b) Recurrent chest infections, cough (sputum) with blood, and persistent breathlessness are main symptoms

c) Smoking is the main risk factor (reason)

d) Only B & C are correct options

e) All are correct options

75 / 100

75. Choose the correct statement among the given below:

a) Each hemoglobin molecule is composed of two polypeptide chains

b) Each myoglobin molecule is composed of one pair of polypeptide chains

c) Each hemoglobin molecule binds one molecule of oxygen (O2)

d) Each hemoglobin molecule consists of four polypeptide chains

e) All are correct options

76 / 100

76. Thoracic cavity and abdominal cavity are separated by:

a) Intercostal muscles

b) Diaphragm

c) Visceral pleura

d) Parietal pleura

77 / 100

77. Name the components of specific Immunity (Immune system):

a) Antibody-mediated immunity

b) B & T cells

c) Natural killer cells

d) Only A and B options

e) Only A and C options

78 / 100

78. Epidermis is supplied by (Blood supply):

a) Epidermal capillaries

b) Avascular (lacks blood supply)

c) Depends on dermis for nutrients

d) Only B and C options

e) A and C

79 / 100

79. Antibodies are secreted by:

a) Plasma cells

b) Memory cells

c) T-cells

d) All cells can produce antibodies

e) None of these

80 / 100

80. Which type of T-cells have CD8-markers (receptors)?

a) Helper T-cells

b) Regulatory T-cells

c) Cytotoxic T-cells

d) Memory cells

81 / 100

81. Immunity transferred from mother to fetus (child) through placenta or breast milk is called:

a) Active Immunity

b) Passive Immunity

c) Artificial Immunity

d) Innate Immunity

e) No Immunity transferred

82 / 100

82. Hypothalamus raises body temperature (thermogenesis) by which mechanism?

a) By producing prostaglandins

b) By producing tumor necrotic factor

c) By producing interleukins

d) By releasing perforin proteins

83 / 100

83. Choose the incorrect statement among the following:

a) Neutrophils are the most abundant WBCs

b) Monocytes have a multilobed nucleus in the center

c) Monocytes are part of innate immunity

d) Monocytes have an average life span of 2-5 days in blood circulation

e) All are correct options

84 / 100

84. Choose the correct option regarding Immunity:

a) Skin and mucous membranes are the first line of defense

b) The immune system is a collection of microorganisms and proteins

c) Phagocytes are part of non-specific immunity

d) Only A and C are correct

e) All (A, B, C) options are correct

85 / 100

85. Which of the following cells are also termed as Antigen presenting cells (APCs)?

a) Helper T-cells

b) Cytotoxic T-cells

c) Eosinophils

d) Macrophages

e) Neutrophils

86 / 100

86. Choose the correct option regarding Inflammation:

a) It is a part of innate immunity

b) Acute inflammation may be characterized by pain and swelling

c) Chronic inflammation may be a consequence of allergy

d) Mediated by histamines and prostaglandins

e) All are correct options

87 / 100

87. Inflammation of the synovial membranes of the joints is:

a) Known as Rheumatoid arthritis

b) A misdirected inflammatory response

c) May lead to deformity

d) Only A and B are correct options

e) All are correct options

88 / 100

88. The majority of carbon dioxide is transported as:

a) As bicarbonate

b) Bound to hemoglobin

c) Bound to albumin

d) As dissolved gas

89 / 100

89. Which structure balances the pressure (air) between the outer and middle ear?

a) Earlobes

b) Eustachian tube

c) Nostrils

d) Nasopharynx

90 / 100

90. The larger lymph vessels are interrupted periodically by bean-shaped structures called:

a) Lymph nodes

b) Spleen

c) Villi

d) Thymus

91 / 100

91. Hypotension is characterized by:

a) Fall in systolic blood pressure below 90 mmHg and diastolic below 60 mmHg

b) Fall in systolic BP below 60 mmHg and diastolic BP below 90 mmHg

c) Rise in systolic BP above 140 mmHg

d) May be associated with risk factors like smoking and obesity

e) Also known as "Silent killer"

92 / 100

92. A lid-like structure/covering that diverts food to the esophagus is called:

a) Epiglottis

b) Larynx

c) Pharynx

d) Tongue

93 / 100

93. The innermost layer of the stomach wall is:

a) Muscularis layer

b) Submucosa

c) Serosa

d) Mucosa

94 / 100

94. Choose Incorrect statement regarding Intrinsic factor:

a) Secreted mainly in body(corpus) of stomach by parietal cells

b) Secreted mainly in pylorus by parietal cells

c) Important for Vit.B12absorption and RBCs maturation

d) Important for myelination(health) of certain Nervous system cells

95 / 100

95. The Cholecystokinin is important for:

a) Release of bile from gall bladder

b) Stimulant for secretion of pancreatic juice

c) Stimulant for secretion of gastric juice

d) Contraction of Smooth muscles of Intestinal wall

e) Only A and B

96 / 100

96. Trypsinogen is converted to its active form trypsin by:

a) Chymotrypsin

b) Cholecystokinin

c) Enterokinase

d) Trysinogenase

97 / 100

97. Stomach acids contained in gastric chyme are neutralized by:

a) Bicarbonate ions from Pancreas

b) Bicarbonate ions from Brunner's glands

c) Ammonium ions from Brunner’s glands

d) Bilirubin and Biliverdin

e) A and B only

98 / 100

98. The Enzymes contained in bile are:

a) Bilirubin and Biliverdin

b) Enterokinase and lipase

c) Lipase only

d) Colipase

e) None of these

99 / 100

99. In Transcription:

a) Gene information is copied into mRNA

b) Gene information is copied into tRNA

c) Gene information is copied into rRNA

d) All are correct

100 / 100

100. There are _______ types of tRNA in human cell and about ____________ of total RNA.

a) 60 ; 10%-20%

b) 45 ; 10%-20%

c) 45 ; 80%

d) 60 ; 80%

Your score is

Instructions for Whole XI Biology Online Test Mdcat-2024:

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