KPK Book Lines Part-1 - ePrepare Academy

Biological Molecules KPK Book Lines Part-1

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1 / 88

Nitrogenous bases in DNA are positioned:

A) Inside the backbone

B) Outside the backbone

C) Randomly

D) In the cytoplasm

2 / 88

DNA contain ____________ polynucleotide strand

A) 1

B) 2

C) 3

D) 4

3 / 88

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 / 88

Optical isomers have different

A) Connectivity

B) Spatial Arrangement

C) Structural Formula

D) Molecular Formula

5 / 88

Lipoproteins are present in:

A) Plasma membrane only

B) Nuclear membrane only

C) All types of cellular membranes

D) Cell wall only

6 / 88

water molecule attaches with another water molecule due to

A) cohesive forces

B) adhesive forces

C) both

D) none

7 / 88

RNA acts mainly as:

A) Energy source

B) Structural support

C) Carrier of genetic information

D) Storage molecule

8 / 88

Addition of a second phosphate to AMP produces:

A) ATP

B) ADP

C) Adenosine

D) Ribose

9 / 88

glycolipid are formed by the combination of

A) Carbohydrates and proteins

B) Carbohydrates and lipids

C) lipids and protein

D) none

10 / 88

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

A) Acylglycerol

B) phospholipids

C) waxes

D) steroids

11 / 88

fibrous proteins are

A) water insoluble

B) water soluble

C) both

D) none

12 / 88

Number of peptide bonds in Hemoglobin are

A) 574

B) 570

C) 572

D) 578

13 / 88

Polysaccharides are polymers formed by the condensation of which units?

A) Fatty acids

B) Amino acids

C) Monosaccharides

D) Nucleotides

14 / 88

DNA strands are held together by:

A) Ionic bonds

B) Covalent bonds

C) Hydrogen bonds

D) Peptide bonds

15 / 88

Chitin is best associated with:

A) Plant starch granules

B) Arthropod exoskeleton

C) Sugarcane juice

D) Milk sugar

16 / 88

Protein synthesis requires information transfer in how many steps?

A) One

B) Two

C) Three

D) Four

17 / 88

Adenine + ribose (pentose sugar) forms:

A) AMP

B) Adenosine

C) ADP

D) ATP

18 / 88

________ is the common storage parts in plants

A) glycogen

B) collagen

C) starch

D) none

19 / 88

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 / 88

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

A) mRNA

B) tRNA

C) rRNA

D) none

21 / 88

a protein molecule may be a

A) fibrous protein

B) globular protein

C) both

D) none

22 / 88

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

A) Peptide bond

B) Phosphodiester bond

C) Glycosidic bond

D) Hydrogen bond

23 / 88

Which is NOT a DNA nitrogenous base?

A) Adenine

B) Guanine

C) Thymine

D) Uracil

24 / 88

Proteins that perform catalytic functions are known as:

A) Hormones

B) Enzymes

C) Structural proteins

D) Antibodies

25 / 88

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 / 88

The main storage polysaccharide in plants is:

A) Glycogen

B) Starch

C) Cellulose

D) Chitin

27 / 88

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 / 88

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

A) Trisaccharide

B) Disaccharide

C) Polysaccharide

D) Monosaccharide

29 / 88

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 / 88

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 / 88

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 / 88

Nucleoproteins are usually:

A) Neutral and insoluble

B) Slightly acidic and soluble in water

C) Basic and insoluble

D) Neutral and lipid-soluble

33 / 88

DNA is composed of how many types of nucleotides?

A) Two

B) Three

C) Four

D) Five

34 / 88

a nucleotide is composed of ________ components

A) 1

B) 2

C) 3

D) 4

35 / 88

our body can only use

A) left handed sugar

B) right handed sugar

C) both

D) none

36 / 88

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 / 88

glucose is an example of

A) monosachharide

B) oligosachharide

C) polysaccharide

D) none

38 / 88

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 / 88

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 / 88

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 / 88

AMP is best described as:

A) A nucleoside

B) A nucleotide

C) A protein

D) A carbohydrate

42 / 88

In plants, proteins are stored mainly in:

A) Cell walls

B) Seeds

C) Vacuoles

D) Chloroplasts

43 / 88

glucose is

A) aldehyde

B) ketone

C) both

D) none

44 / 88

Which molecule contains carbohydrate chains attached to proteins?

A) Lipoprotein

B) Glycolipid

C) Glycoprotein

D) Nucleoprotein

45 / 88

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

A) Chemical

B) Physical

C) Neutral

D) All

46 / 88

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

47 / 88

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

A) 16-18

B) 16-17

C) 17-18

D) 18-19

48 / 88

lipoprotein are formed by the combination of

A) lipids and protein

B) protein and carbohydrates

C) carbohydrates and lipids

D) none

49 / 88

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

A) 80%

B) 85%

C) 90%

D) 95%

50 / 88

Which of the following is a globular protein?

A) Keratin

B) Collagen

C) Hemoglobin

D) Myosin

51 / 88

Nucleoproteins are formed by combining proteins with:

A) Carbohydrates

B) Lipids

C) Nucleic acids

D) Minerals

52 / 88

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

53 / 88

Glycoproteins are an integral component of:

A) Cell wall

B) Plasma membrane

C) Ribosome

D) Mitochondrial matrix

54 / 88

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

A) Condensation reaction

B) Neutralization reaction

C) Fermentation reaction

D) Photolysis reaction

55 / 88

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

56 / 88

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

57 / 88

Proteins that act as antibodies belong to which functional class?

A) Catalytic

B) Defensive

C) Transport

D) Hormonal

58 / 88

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

59 / 88

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

60 / 88

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

61 / 88

Sucrose is composed of which two monosaccharides?

A) Glucose and glucose

B) Glucose and fructose

C) Glucose and galactose

D) Fructose and fructose

62 / 88

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

A) chromosome

B) gene

C) linkage groups

D) none

63 / 88

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

64 / 88

Aldehydic Group has a formula

A) COH2

B) CO2H

C) COH

D) OH

65 / 88

triglycerides are stored in

A) animal

B) plants

C) both animals and plants

D) none

66 / 88

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

A) 10%

B) 20%

C) 30%

D) 40%

67 / 88

in nails, muscle cells and bones ________ is present

A) fibrous protein

B) globular protein

C) both

D) none

68 / 88

amino acids are _________ having amino group

A) alcohol

B) phenol

C) carboxylic acids

D) none

69 / 88

Which of the following are NOT considered organic macromolecules?

A) Nucleic acids

B) Inorganic salts

C) Polysaccharides

D) Polypeptides

70 / 88

acylglycerol are lipids which are composed of

A) glycerol

B) fatty acids

C) both A and B

D) Phosphate group

71 / 88

Which set contains only disaccharides?

A) Sucrose, lactose, maltose

B) Glucose, fructose, galactose

C) Starch, cellulose, chitin

D) Glucose, starch, glycogen

72 / 88

ATP differs from ADP by the presence of:

A) One base

B) One sugar

C) One extra phosphate

D) One hydrogen bond

73 / 88

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

74 / 88

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

75 / 88

a code is a sequence of how many nitrogenous bases

A) 2

B) 3

C) 4

D) 5

76 / 88

which one is single ring compound

A) Pyrimidine

B) purines

C) both

D) none

77 / 88

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

78 / 88

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

A) 16

B) 17

C) 18

D) 19

79 / 88

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

80 / 88

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

A) Linus Pauling

B) Sanger (1951)

C) Watson and Crick

D) Mendel

81 / 88

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

A) protein

B) lipids

C) nucleic acid

D) none

82 / 88

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

A) Monosaccharide

B) Disaccharide

C) Oligosaccharide

D) Polysaccharide

83 / 88

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

A) helium

B) hydrogen

C) nitrogen

D) carbon

84 / 88

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

85 / 88

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

86 / 88

Cellulose is primarily a:

A) Storage carbohydrate in animals

B) Structural carbohydrate in plant cell walls

C) Disaccharide in milk

D) Sugar from sugarcane

87 / 88

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

88 / 88

a phospholipid molecule has how many parts

A) 2

B) 4

C) 6

D) 8

Your score is

The average score is 84%

0%

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1	Mujeebullah p3	100 %	6 minutes 19 seconds
2	Muhammad Mehran p3	100 %	15 minutes 35 seconds
3	Ateeqa Gul p1	99 %	6 minutes 21 seconds
4	Savaira Gulalai p2	99 %	16 minutes 8 seconds
5	Fatima P2	99 %	24 minutes 14 seconds
6	Rahmatullah p3	99 %	45 minutes 50 seconds
7	Maryam p2	99 %	1 hours 1 minutes 56 seconds
8	Abbas khan P1	98 %	10 minutes 5 seconds
9	Salma khalil	98 %	14 minutes 18 seconds
10	Mahnoor	98 %	15 minutes 30 seconds
11	Haadi Khattak p3	98 %	23 minutes 9 seconds
12	Muhammad p2	98 %	40 minutes 43 seconds
13	Anwar ali khan Ak p1	98 %	56 minutes 33 seconds
14	Fatima Package 3	97 %	8 minutes 10 seconds
15	Aneesa Ahmad p2	97 %	12 minutes 35 seconds
16	Atiq ur rahman p3	97 %	17 minutes 48 seconds
17	Qazi Aizaz Ud Din p3	97 %	20 minutes 44 seconds
18	Saad Ur Rahman p3	97 %	23 minutes 46 seconds
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22	Lailma shah P3	96 %	15 minutes 3 seconds
23	Zohak p2	96 %	15 minutes 39 seconds
24	Raheela P3	96 %	17 minutes
25	Najiya Iqbal P3	96 %	19 minutes 46 seconds
26	Qasim Ali P3	96 %	22 minutes 42 seconds
27	Muhammad Arif p2	96 %	24 minutes 4 seconds
28	Tuba Rahman p2	96 %	27 minutes 45 seconds
29	SAFI ÜLLÂH p1	96 %	40 minutes 55 seconds
30	Syed Zeeshan haider p2	96 %	43 minutes 25 seconds
31	junaid iqbal P1	95 %	11 minutes 30 seconds
32	Arsalan Ahmad p3	95 %	13 minutes 17 seconds
33	Saad Ali p2	95 %	15 minutes 33 seconds
34	Amara Hussain p3	95 %	20 minutes 49 seconds
35	Dureadan p2	95 %	21 minutes 10 seconds
36	Muhammad Zakarya p1	95 %	25 minutes 8 seconds
37	Ijaz Ullah p3	95 %	26 minutes 34 seconds
38	Kamran Ahmad p3	95 %	54 minutes 56 seconds
39	Ziaullah Rahim p3	95 %	1 hours 1 minutes 57 seconds
40	Fareeha p3	95 %	3 hours 45 minutes 23 seconds
41	lubna p2	94 %	17 minutes 56 seconds
42	Zarghona p3	94 %	18 minutes 51 seconds
43	Zuha Shafi p2	94 %	19 minutes 54 seconds
44	Sarajalil p2	94 %	20 minutes 8 seconds
45	Marium p1	94 %	28 minutes 52 seconds
46	Muhammad kamran p3	94 %	31 minutes 53 seconds
47	Bakhtawar Jadoon p3	93 %	9 minutes 57 seconds
48	Saqib alam p1	93 %	15 minutes 16 seconds
49	Asad ullah p3	93 %	23 minutes 6 seconds
50	Jalwa Arif	93 %	24 minutes 19 seconds
51	Naveed Ahmad p3	93 %	27 minutes 28 seconds
52	Sobia Sahar p1	93 %	55 minutes 16 seconds
53	Eman Johar p1	92 %	7 minutes 6 seconds
54	Waleeja p2	92 %	10 minutes 46 seconds
55	Humam shah p2	92 %	15 minutes 3 seconds
56	Aman taj P2	92 %	17 minutes 5 seconds
57	Rizwan Ullah p1	92 %	24 minutes 12 seconds
58	Ansa Gul p3	92 %	24 minutes 36 seconds
59	Kashmala khan p1	92 %	26 minutes 48 seconds
60	Inshah khan P2	92 %	29 minutes 13 seconds
61	Hassan jamal	92 %	43 minutes 21 seconds
62	Imad khan p3	92 %	51 minutes 43 seconds
63	Muhammad Aftab Ahmad p3	92 %	1 hours 13 seconds
64	Nabiha Saeed p3	92 %	1 hours 31 seconds
65	Muhammad hasnain ahmad P3	92 %	1 hours 47 minutes 14 seconds
66	Shazma Batool p3	91 %	18 minutes 32 seconds
67	syed Abdullah Shah p2	91 %	21 minutes 25 seconds
68	Waqas Ullah p1	91 %	24 minutes 51 seconds
69	Nimra mehsood p1	91 %	24 minutes 56 seconds
70	Aziz subhan p1	91 %	32 minutes 28 seconds
71	Abdur Rahman khan p3	91 %	35 minutes 57 seconds
72	Zarnain Munir p2	91 %	1 hours 58 seconds
73	Mehrunisah p3	90 %	9 minutes 33 seconds
74	Dr khan p2	90 %	13 minutes 32 seconds
75	Bilal Ahmad p3	90 %	14 minutes 42 seconds
76	Fatma uzair P2	90 %	18 minutes 33 seconds
77	Fajar Rafi p3	90 %	19 minutes 21 seconds
78	Anis ur Rahman p1	90 %	20 minutes 42 seconds
79	Dawood Akhtar p1	90 %	23 minutes 26 seconds
80	umama arshad P3	90 %	26 minutes 22 seconds
81	Anfal Saleem p3	90 %	28 minutes 48 seconds
82	Wajeeha p3	90 %	29 minutes 44 seconds
83	Bareera Shaukat p3	89 %	15 minutes 27 seconds
84	Ajwa Mahboob P3	89 %	18 minutes 14 seconds
85	Zakir ayaz p3	89 %	20 minutes 2 seconds
86	Danish Amjad p3	89 %	22 minutes 29 seconds
87	Laibahaman P3	89 %	37 minutes 59 seconds
88	Mahil khan p3	89 %	40 minutes 33 seconds
89	M Sameer Ali p2	88 %	11 minutes 48 seconds
90	Laraib khan p3	88 %	17 minutes 29 seconds
91	Nasira Bibi p2	88 %	45 minutes 39 seconds
92	Ujala Khan p2	88 %	1 hours 11 minutes 21 seconds
93	Parkha P2	87 %	11 minutes 22 seconds
94	Muhammad Shehzad p2	87 %	20 minutes 20 seconds
95	Labiba Rehman p1	87 %	23 minutes 2 seconds
96	Kalsoom kokab p2	87 %	26 minutes 36 seconds
97	Ghufran Ullah Jalal p3	87 %	1 hours 1 minutes 19 seconds
98	Muhammad Mustafa khan P3	86 %	9 minutes 49 seconds
99	Aroosa bibi p2	86 %	14 minutes 15 seconds
100	Salma anwar p2	86 %	14 minutes 31 seconds
101	Maryam p3	86 %	16 minutes 18 seconds
102	Musa said p2	86 %	19 minutes 9 seconds
103	sajad Ali p1	86 %	21 minutes 54 seconds
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105	Sana Noor	85 %	10 minutes 7 seconds
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107	Malala khan p3	85 %	1 hours 57 minutes 54 seconds
108	Sayed Haroon Shah P3	84 %	9 minutes 8 seconds
109	PS P2	84 %	11 minutes 17 seconds
110	Aisha p1	84 %	12 minutes 1 seconds
111	Faraz Ahmad p2	84 %	40 minutes 12 seconds
112	Humaira Naz p2	84 %	1 hours 23 minutes 21 seconds
113	Manahil p2	83 %	7 minutes 38 seconds
114	Yaseen Khan	83 %	16 minutes 18 seconds
115	Faatiha Qazi P2	82 %	14 minutes 43 seconds
116	Jumaina Tariq p2	82 %	16 minutes 17 seconds
117	Asmar Azeem p1	82 %	1 hours 26 minutes 42 seconds
118	urooj Iqbal p2	81 %	34 minutes 15 seconds
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120	Aiman ayaz p3	81 %	39 minutes 59 seconds
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130	hamna riaz p2	76 %	7 hours 44 minutes 39 seconds
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