KPK Book Lines Part-1 - ePrepare Academy

Biological Molecules KPK Book Lines Part-1

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1 / 91

Nitrogenous bases in DNA are positioned:

A) Inside the backbone

B) Outside the backbone

C) Randomly

D) In the cytoplasm

2 / 91

DNA contain ____________ polynucleotide strand

A) 1

B) 2

C) 3

D) 4

3 / 91

The oxygen end of a water molecule carries a partial negative charge mainly because oxygen is:

A) smaller than hydrogen

B) less reactive than hydrogen

C) more electronegative than hydrogen

D) positively charged in water

4 / 91

Optical isomers have different

A) Connectivity

B) Spatial Arrangement

C) Structural Formula

D) Molecular Formula

5 / 91

Lipoproteins are present in:

A) Plasma membrane only

B) Nuclear membrane only

C) All types of cellular membranes

D) Cell wall only

6 / 91

water molecule attaches with another water molecule due to

A) cohesive forces

B) adhesive forces

C) both

D) none

7 / 91

RNA acts mainly as:

A) Energy source

B) Structural support

C) Carrier of genetic information

D) Storage molecule

8 / 91

Addition of a second phosphate to AMP produces:

A) ATP

B) ADP

C) Adenosine

D) Ribose

9 / 91

glycolipid are formed by the combination of

A) Carbohydrates and proteins

B) Carbohydrates and lipids

C) lipids and protein

D) none

10 / 91

which one contain one glycerol molecule, two fatty acids and one phosphoric acid molecule

A) Acylglycerol

B) phospholipids

C) waxes

D) steroids

11 / 91

fibrous proteins are

A) water insoluble

B) water soluble

C) both

D) none

12 / 91

Number of peptide bonds in Hemoglobin are

A) 574

B) 570

C) 572

D) 578

13 / 91

Polysaccharides are polymers formed by the condensation of which units?

A) Fatty acids

B) Amino acids

C) Monosaccharides

D) Nucleotides

14 / 91

DNA strands are held together by:

A) Ionic bonds

B) Covalent bonds

C) Hydrogen bonds

D) Peptide bonds

15 / 91

Chitin is best associated with:

A) Plant starch granules

B) Arthropod exoskeleton

C) Sugarcane juice

D) Milk sugar

16 / 91

Protein synthesis requires information transfer in how many steps?

A) One

B) Two

C) Three

D) Four

17 / 91

Adenine + ribose (pentose sugar) forms:

A) AMP

B) Adenosine

C) ADP

D) ATP

18 / 91

________ is the common storage parts in plants

A) glycogen

B) collagen

C) starch

D) none

19 / 91

In capillary rise inside a thin tube, water rises mainly due to:

A) only gravity

B) only cohesion

C) both adhesion to tube walls and cohesion among water molecules

D) only ionization of water

20 / 91

________ carries messages from the DNA to the ribosome for protein synthesis

A) mRNA

B) tRNA

C) rRNA

D) none

21 / 91

a protein molecule may be a

A) fibrous protein

B) globular protein

C) both

D) none

22 / 91

The covalent bond formed between two monosaccharide units is known as:

A) Peptide bond

B) Phosphodiester bond

C) Glycosidic bond

D) Hydrogen bond

23 / 91

Which is NOT a DNA nitrogenous base?

A) Adenine

B) Guanine

C) Thymine

D) Uracil

24 / 91

Proteins that perform catalytic functions are known as:

A) Hormones

B) Enzymes

C) Structural proteins

D) Antibodies

25 / 91

Which sequence correctly describes what happens in a lake as temperature falls from 10°C to 0°C?

A) Cold water always sinks; ice forms at the bottom first

B) Water becomes denser until 4°C and sinks; below 4°C it stays near top and can freeze

C) Water becomes less dense until 4°C and rises; then sinks again

D) Temperature change does not affect density of water

26 / 91

The main storage polysaccharide in plants is:

A) Glycogen

B) Starch

C) Cellulose

D) Chitin

27 / 91

The proportions of chemical compounds in a cell can vary based on:

A) Only the organism's size

B) The type of cell and the organism

C) Only the availability of water

D) The atmospheric pressure

28 / 91

A carbohydrate that yields exactly 3 monosaccharide units on hydrolysis is called a:

A) Trisaccharide

B) Disaccharide

C) Polysaccharide

D) Monosaccharide

29 / 91

the chemical analysis of protoplasm shows that it is composed up of how many type of compounds

A) 1

B) 2

C) 3

D) 4

30 / 91

Proteins contain the elements:

A) C, H, O only

B) C, H, O, N and sometimes S

C) C, H, O, P

D) C, H, O, Ca

31 / 91

Water ionizes to produce ions. This is useful in cells because ions:

A) stop all enzyme activity

B) support normal enzyme functioning and help control the medium’s chemistry

C) always make the cell medium acidic only

D) cannot exist inside living cells

32 / 91

Nucleoproteins are usually:

A) Neutral and insoluble

B) Slightly acidic and soluble in water

C) Basic and insoluble

D) Neutral and lipid-soluble

33 / 91

DNA is composed of how many types of nucleotides?

A) Two

B) Three

C) Four

D) Five

34 / 91

a nucleotide is composed of ________ components

A) 1

B) 2

C) 3

D) 4

35 / 91

our body can only use

A) left handed sugar

B) right handed sugar

C) both

D) none

36 / 91

Carbon, hydrogen, nitrogen, oxygen, phosphorus and sulphur are collectively known as:

A) Trace elements

B) Rare elements

C) Most common elements in living bodies

D) Inorganic elements

37 / 91

glucose is an example of

A) monosachharide

B) oligosachharide

C) polysaccharide

D) none

38 / 91

Which of the following best describes the role of water in a hydrolysis reaction?

A) It acts as a catalyst

B) It is a byproduct of the reaction

C) It provides atoms to satisfy the valencies of the separated monomers

D) It increases the temperature of the reaction

39 / 91

The structural proteins of muscles responsible for contraction are:

A) Actin and myosin

B) Tubulin and keratin

C) Hemoglobin and fibrin

D) Albumin and insulin

40 / 91

At 0°C, ice floats on water because ice has:

A) higher density than liquid water

B) lower density than liquid water

C) more salt dissolved

D) no hydrogen bonds

41 / 91

AMP is best described as:

A) A nucleoside

B) A nucleotide

C) A protein

D) A carbohydrate

42 / 91

In plants, proteins are stored mainly in:

A) Cell walls

B) Seeds

C) Vacuoles

D) Chloroplasts

43 / 91

glucose is

A) aldehyde

B) ketone

C) both

D) none

44 / 91

Cholesterol is mainly associated with:

A) Plant cell wall formation

B) Animal cell membranes

C) DNA replication

D) Ribosome formation

45 / 91

Which molecule contains carbohydrate chains attached to proteins?

A) Lipoprotein

B) Glycolipid

C) Glycoprotein

D) Nucleoprotein

46 / 91

The joining process that builds terpenoids from isoprenoid units is:

A) Hydrolysis

B) Condensation

C) Neutralization

D) Sublimation

47 / 91

The body of plants is made of ----- elements

A) Chemical

B) Physical

C) Neutral

D) All

48 / 91

Chemical analysis of the living content of a cell (protoplasm) categorizes its components into:

A) Elements and atoms

B) Organic and inorganic compounds

C) Proteins and carbohydrates

D) Solutes and solvents

49 / 91

most of fatty acids in a cell contain ___________carbon atom per molecule

A) 16-18

B) 16-17

C) 17-18

D) 18-19

50 / 91

lipoprotein are formed by the combination of

A) lipids and protein

B) protein and carbohydrates

C) carbohydrates and lipids

D) none

51 / 91

carbon, hydrogen and oxygen constitute about ______ of human body by weight

A) 80%

B) 85%

C) 90%

D) 95%

52 / 91

Which of the following is a globular protein?

A) Keratin

B) Collagen

C) Hemoglobin

D) Myosin

53 / 91

Nucleoproteins are formed by combining proteins with:

A) Carbohydrates

B) Lipids

C) Nucleic acids

D) Minerals

54 / 91

Which situation is the best example of cohesion?

A) Water wetting a leaf surface

B) Water molecules sticking to each other to form a droplet

C) Water dissolving NaCl into ions

D) Ice floating on water

55 / 91

Glycoproteins are an integral component of:

A) Cell wall

B) Plasma membrane

C) Ribosome

D) Mitochondrial matrix

56 / 91

Terpenoids are formed from repeating units called:

A) Amino acid units

B) Nucleotide units

C) Isoprenoid units

D) Monosaccharide units

57 / 91

Formation of a triglyceride from glycerol and fatty acids is a:

A) Condensation reaction

B) Neutralization reaction

C) Fermentation reaction

D) Photolysis reaction

58 / 91

To break a dipeptide back into two amino acids, the reaction must consume:

A) One molecule of CO2

B) One molecule of water

C) Two molecules of ATP

D) One oxygen atom

59 / 91

The biological significance of protein diversity arises from:

A) Variations in amino acid number and sequence

B) Same sequence in every protein

C) Replacement of nitrogen by sulfur

D) Conversion of protein to lipid

60 / 91

Proteins that act as antibodies belong to which functional class?

A) Catalytic

B) Defensive

C) Transport

D) Hormonal

61 / 91

In winter, lakes freeze from the top rather than from the bottom mainly because:

A) ice is denser than liquid water and sinks

B) ice is less dense than liquid water and floats

C) water becomes most dense at 0°C

D) hydrogen bonds stop forming in cold water

62 / 91

Which of the following defines condensation?

A) Change of solid to vapor

B) Change of vapor to liquid

C) Change of liquid to vapor

D) Change of vapor to solid

63 / 91

a code is the sequence of

A) three nitrogenous bases

B) one phosphate strand of DNA molecule

C) one sugar strand of DNA molecule

D) all of these

64 / 91

Sucrose is composed of which two monosaccharides?

A) Glucose and glucose

B) Glucose and fructose

C) Glucose and galactose

D) Fructose and fructose

65 / 91

a ________ is the unit of hereditary in a living organism.

A) chromosome

B) gene

C) linkage groups

D) none

66 / 91

Which organizational level serves as the primary building block for all material things in the universe?

A) Molecules

B) Chemical elements

C) Protoplasm

D) Organelles

67 / 91

Aldehydic Group has a formula

A) COH2

B) CO2H

C) COH

D) OH

68 / 91

triglycerides are stored in

A) animal

B) plants

C) both animals and plants

D) none

69 / 91

protoplasm cannot survive if its water content is reduced as low as

A) 10%

B) 20%

C) 30%

D) 40%

70 / 91

in nails, muscle cells and bones ________ is present

A) fibrous protein

B) globular protein

C) both

D) none

71 / 91

amino acids are _________ having amino group

A) alcohol

B) phenol

C) carboxylic acids

D) none

72 / 91

Which of the following are NOT considered organic macromolecules?

A) Nucleic acids

B) Inorganic salts

C) Polysaccharides

D) Polypeptides

73 / 91

acylglycerol are lipids which are composed of

A) glycerol

B) fatty acids

C) both A and B

D) Phosphate group

74 / 91

Which set contains only disaccharides?

A) Sucrose, lactose, maltose

B) Glucose, fructose, galactose

C) Starch, cellulose, chitin

D) Glucose, starch, glycogen

75 / 91

ATP differs from ADP by the presence of:

A) One base

B) One sugar

C) One extra phosphate

D) One hydrogen bond

76 / 91

In triglyceride formation, the reacting parts are mainly:

A) Amino groups and phosphate groups

B) Acid portions of fatty acids and hydroxyl groups of glycerol

C) Aldehyde groups and ketone groups

D) Nitrogen bases and sugars

77 / 91

If a polymer chain consists of 'n' monomers, how many water molecules are typically produced during its formation via condensation?

A) n

B) n + 1

C) n − 1

D) 2n

78 / 91

a code is a sequence of how many nitrogenous bases

A) 2

B) 3

C) 4

D) 5

79 / 91

which one is single ring compound

A) Pyrimidine

B) purines

C) both

D) none

80 / 91

Both condensation reactions and hydrolysis reactions in cells commonly require the presence of:

A) Specific enzymes

B) High temperatures

C) Ultraviolet light

D) Free oxygen

81 / 91

each steroid is formed of a backbone of four fused carbon rings containing ________ carbon atoms

A) 16

B) 17

C) 18

D) 19

82 / 91

a triglycerids molecule is converted into phospholipid when a fatty acid is replaced by

A) one phosphate

B) two phosphate

C) three phosphate

D) four phosphate

83 / 91

Determination of the amino acid sequence in insulin was first achieved by:

A) Linus Pauling

B) Sanger (1951)

C) Watson and Crick

D) Mendel

84 / 91

which one yield as twice as energy per gram as that of carbohydrate

A) protein

B) lipids

C) nucleic acid

D) none

85 / 91

A carbohydrate that yields 6 monosaccharide units on complete hydrolysis is classified as:

A) Monosaccharide

B) Disaccharide

C) Oligosaccharide

D) Polysaccharide

86 / 91

Ghee with saturated fatty acid is prepared from vegetable oil by passing ________ through it

A) helium

B) hydrogen

C) nitrogen

D) carbon

87 / 91

Besides C, H and O, some lipids may also contain:

A) Sodium and chlorine

B) Nitrogen and phosphorus

C) Iron and iodine

D) Calcium and potassium

88 / 91

Sweating cools the human body mainly because water:

A) freezes on the skin

B) needs a lot of heat to evaporate and takes that heat from the body

C) breaks into hydrogen and oxygen gases

D) becomes salty on the skin

89 / 91

Cellulose is primarily a:

A) Storage carbohydrate in animals

B) Structural carbohydrate in plant cell walls

C) Disaccharide in milk

D) Sugar from sugarcane

90 / 91

Which statement about branching is most accurate?

A) Glycogen is more extensively branched than starch

B) Starch is always more branched than glycogen

C) Cellulose is highly branched

D) Chitin is always unbranched and soluble

91 / 91

a phospholipid molecule has how many parts

A) 2

B) 4

C) 6

D) 8

Your score is

The average score is 83%

0%

Pos.	Name	Duration	Points
1	Mujeebullah p3	6 minutes 19 seconds	93
2	Muhammad Mehran p3	15 minutes 35 seconds	93
3	Ateeqa Gul p1	6 minutes 21 seconds	92
4	Savaira Gulalai p2	16 minutes 8 seconds	92
5	Fatima P2	24 minutes 14 seconds	92
6	Rahmatullah p3	45 minutes 50 seconds	90
7	Maryam p2	1 hours 1 minutes 56 seconds	92
8	Abbas khan P1	10 minutes 5 seconds	91
9	Salma khalil	14 minutes 18 seconds	89
10	Mahnoor	15 minutes 30 seconds	91
11	Haadi Khattak p3	23 minutes 9 seconds	91
12	Anwar ali khan Ak p1	56 minutes 33 seconds	91
13	Fatima Package 3	8 minutes 10 seconds	90
14	Aneesa Ahmad p2	12 minutes 35 seconds	90
15	Qazi Aizaz Ud Din p3	20 minutes 44 seconds	90
16	Asim hussain shah p2	29 minutes 54 seconds	90
17	Azhar Ali p3	12 minutes 51 seconds	87
18	Lailma shah P3	15 minutes 3 seconds	89
19	Zohak p2	15 minutes 39 seconds	87
20	Raheela P3	17 minutes	89
21	Najiya Iqbal P3	19 minutes 46 seconds	89
22	Muhammad Arif p2	24 minutes 4 seconds	89
23	Tuba Rahman p2	27 minutes 45 seconds	89
24	SAFI ÜLLÂH p1	40 minutes 55 seconds	87
25	Syed Zeeshan haider p2	43 minutes 25 seconds	87
26	junaid iqbal P1	11 minutes 30 seconds	88
27	Arsalan Ahmad p3	13 minutes 17 seconds	88
28	Saad Ali p2	15 minutes 33 seconds	88
29	Muhammad Zakarya p1	25 minutes 8 seconds	86
30	Ijaz Ullah p3	26 minutes 34 seconds	88
31	Ziaullah Rahim p3	1 hours 1 minutes 57 seconds	86
32	Fareeha p3	3 hours 45 minutes 23 seconds	88
33	lubna p2	17 minutes 56 seconds	87
34	Zarghona p3	18 minutes 51 seconds	87
35	Zuha Shafi p2	19 minutes 54 seconds	87
36	Sarajalil p2	20 minutes 8 seconds	87
37	Marium p1	28 minutes 52 seconds	87
38	Muhammad kamran p3	31 minutes 53 seconds	87
39	Asad ullah p3	23 minutes 6 seconds	85
40	Sobia Sahar p1	55 minutes 16 seconds	85
41	Eman Johar p1	7 minutes 6 seconds	84
42	Waleeja p2	10 minutes 46 seconds	86
43	Ansa Gul p3	24 minutes 36 seconds	84
44	Hassan jamal	43 minutes 21 seconds	86
45	Imad khan p3	51 minutes 43 seconds	86
46	Muhammad Aftab Ahmad p3	1 hours 13 seconds	84
47	syed Abdullah Shah p2	21 minutes 25 seconds	83
48	Waqas Ullah p1	24 minutes 51 seconds	85
49	Aziz subhan p1	32 minutes 28 seconds	85
50	Abdur Rahman khan p3	35 minutes 57 seconds	85
51	Zarnain Munir p2	1 hours 58 seconds	85
52	Mehrunisah p3	9 minutes 33 seconds	84
53	Bilal Ahmad p3	14 minutes 42 seconds	84
54	Fatma uzair P2	18 minutes 33 seconds	84
55	umama arshad P3	26 minutes 22 seconds	82
56	Wajeeha p3	29 minutes 44 seconds	84
57	Zakir ayaz p3	20 minutes 2 seconds	83
58	Danish Amjad p3	22 minutes 29 seconds	83
59	Laibahaman P3	37 minutes 59 seconds	83
60	Mahil khan p3	40 minutes 33 seconds	83
61	Ujala Khan p2	1 hours 11 minutes 21 seconds	82
62	Labiba Rehman p1	23 minutes 2 seconds	81
63	Kalsoom kokab p2	26 minutes 36 seconds	81
64	Ghufran Ullah Jalal p3	1 hours 1 minutes 19 seconds	79
65	Muhammad Mustafa khan P3	9 minutes 49 seconds	80
66	Maryam p3	16 minutes 18 seconds	80
67	Musa said p2	19 minutes 9 seconds	80
68	Zohaib p1	10 minutes 7 seconds	77
69	Fatima Zunaira p3	47 minutes 16 seconds	79
70	Malala khan p3	1 hours 57 minutes 54 seconds	79
71	PS P2	11 minutes 17 seconds	76
72	Aisha p1	12 minutes 1 seconds	78
73	Faraz Ahmad p2	40 minutes 12 seconds	78
74	Humaira Naz p2	1 hours 23 minutes 21 seconds	78
75	Manahil p2	7 minutes 38 seconds	77
76	Yaseen Khan	16 minutes 18 seconds	77
77	Faatiha Qazi P2	14 minutes 43 seconds	76
78	Jumaina Tariq p2	16 minutes 17 seconds	76
79	Asmar Azeem p1	1 hours 26 minutes 42 seconds	76
80	urooj Iqbal p2	34 minutes 15 seconds	75
81	Sawaira p2	34 minutes 57 seconds	75
82	Romaisa Noor p3	14 minutes 34 seconds	73
83	Faizan ahmad p2	13 minutes 14 seconds	72
84	Noor Ullah p3	19 minutes 50 seconds	72
85	Imdad Ullah p1	20 minutes 46 seconds	72
86	Iqra Bibi p2	28 minutes 43 seconds	72
87	Huzaifa Rasool p1	18 minutes 46 seconds	71
88	hamna riaz p2	7 hours 44 minutes 39 seconds	69
89	Ahmad Khan p3	2 hours 53 minutes 28 seconds	70
90	Sudais khan p3	14 minutes 42 seconds	67
91	M Huzaifa p2	2 hours 15 minutes 16 seconds	67
92	Irfan ullah P2	50 minutes 58 seconds	67
93	Syed Nauman P3	22 minutes 14 seconds	62
94	muheem baloch p3	21 minutes 30 seconds	52
95	Eprepare Academy	4 minutes 57 seconds	6

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