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Biology Chapter No. 6 CHROMOSOMES & DNA 2nd Year Online MCQs

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Biology
CHROMOSOMES & DNA
Chapter No. 6
Second Year
Multiple Choice Questions
Note : All MCQ’s selected in this test are from OLD F.Sc. board , UHS and PMC(Pakistan Medical Commission) Islamabad Papers.
 








Book Name :  Biology
Chapter No. 06
Chapter Name : CHROMOSOMES & DNA
Total MCQ from Text Book :  100
Book Version  :
2022

Published By : Punjab Text Book Board Lahore
Approved By : Govt of the Punjab and Federal Ministry for Education
Test Type : MCQ 
Exam conduct By : Inter Boards of Sindh, KPK, Balochistan, AJK, Gilgit Baltistan, Punjab & Federal
Class / Grade  : 12th ( F.Sc. Intermediate)
Total Marks : 100
Total Time :  100 minutes

GRADE 12 - BIOLOGY CHAPTER NO.6 CHROMOSOMES & DNA

GRADE 12 - BIOLOGY CHAPTER NO.6 CHROMOSOMES & DNA

1 / 100

mRNA is synthesized by: (Grw 2016)

2 / 100

DNA was discovered in: (Rwp 2016)

3 / 100

Number of histone protein molecules in a single nucleosomes are

4 / 100

Sickle cell anemia is caused due to change of glutamic acid to

5 / 100

DNA changes are called mutations and organisms that have these changes is called:

6 / 100

The diffraction pattern of DNA prepared by Rosalind Franklin suggested that its molecule had a shape of a helix, with a diameter of 2nm and a complete helical turn of;

7 / 100

The genetic codes for arginine may be;

8 / 100

Which of the following is a non sense codon? (Swl 2015)

9 / 100

Sequence of amino acids in insulin molecules were determined by

10 / 100

The number of chromosomes in frog is: (Rwp ,13)

11 / 100

The disease alkaptonuria was studied by

12 / 100

A group of three bases of nucleotides of messenger RNA which specifies for a particular amino acid is called as;

13 / 100

Okazaki fragment is a

14 / 100

tail of mRNA is in the form of Poly A linked to 3' end of the:

15 / 100

The base pairs in human genome are

16 / 100

The number of chromosomes in mouse are :

17 / 100

m RNA is synthesized by RNA polymerase :

18 / 100

tRNA is synthesized by

19 / 100

The complete sequence of Insulin was determined in

20 / 100

Chromosomes having the centromere

21 / 100

This condition appears as a result of point mutation: (Fsd 2016)

22 / 100

J-shaped chromosomes are called

23 / 100

The transforming activity is destroyed due to

24 / 100

The length of Okazaki fragments is

25 / 100

The first evidence regarding DNA as the hereditary material was provided by Frederick Griffth, a British;

26 / 100

Minimal medium was prepared by

27 / 100

White-eyed mutant fruitfully was detected by Thomas Hunt Morgan in;

28 / 100

The strand which elongates towards the replication fork is (Sgd 2015)

29 / 100

Which of the followings is absent In minimal medium?

30 / 100

The number of chromosomes is 40 pairs in:

31 / 100

The ultimate source of changes is (D.G.Khan 2016)

32 / 100

Particular array of chromosomes that an individual possesses is called Its:

33 / 100

The highly condensed portion of chromatin is called

34 / 100

Chromosomal theory of inhoritancevas first formulated by: (Bwp 2016)

35 / 100

The centrAl role of chromosome in heredity was suggested by

36 / 100

A central role for chromosomes in heredity was first suggested in 1900 by:

37 / 100

Transcription starts at the RNA polyrnerase binding site called promoter on the DNA:

38 / 100

Successive tRNA molecules with their attached amino acids appear at

39 / 100

Protein synthesis occurs on?

40 / 100

In transcription , the simplest stop signal is a series of :

41 / 100

In phenylketonuria, phenylalanine is not degraded because of defective enzyme:

42 / 100

The position of a gone on the chromosome is called its .(Grw 2015)

43 / 100

One gene encodes for one

44 / 100

Morphological characteristics of chromosomes are collectively called:

45 / 100

Unlike most protoins, histones are (Grw 2015)

46 / 100

The binding site is

47 / 100

Coding strand is

48 / 100

X-ray diffraction analysis of DNA was performed by

49 / 100

Non-sense codons are recognized by:

50 / 100

Chromosomal theory of inheritance was first formulated by

51 / 100

Experiments on neurospora were performed by

52 / 100

Codes are present on

53 / 100

Number of chromosome present in honeybee are: (Lhr 2014 G II)

54 / 100

The strands In which elongates towards replication fork Is

55 / 100

The DNA polymerase only add nucleotide to the end

56 / 100

Haploid organislms have?

57 / 100

More than 500 pairs of chromosome are found in some:

58 / 100

The true replicating enzyme is

59 / 100

The genetic code for the amino acid methionine is?

60 / 100

In 1953, F-Sanger described the complete sequence of Amino Acids of

61 / 100

In eukaryotes, the number of nucleotides in Okazaki fragments are about:

62 / 100

Chromosomes were first observed In the dividing cells of :

63 / 100

The genetic code for the amino acid methionine is;

64 / 100

Every gone starta with initiation codon AUG which encodes ton the amino acid

65 / 100

Chromosome were first discovered by:

66 / 100

Each Okazaki fragment is synthesized by: (Sahiwal 13)

67 / 100

Meselson and Stahl used radioactive isotope of

68 / 100

The enzyme which attaches the fragments of DNA is

69 / 100

The total chromosome complement of a cell is called

70 / 100

Cap in mRNA is

71 / 100

A typical human chromosomes contain nucleotide about

72 / 100

The bead like structure present in the chromosome is

73 / 100

Transfer of genetic material from ono soil to another which It the genetic make up of recipient coil is called: (Fsd 2015)

74 / 100

Interphase nucleus contains:

75 / 100

The number of chromosomes In corn are :

76 / 100

The genetic codes for arginine may be?

77 / 100

Chromosomal part which uncoils, during inter phase is called

78 / 100

Repeating units of DNA are called (Grw 2014, Mirpur 12)

79 / 100

The shape of submetacentric chromosome is:

80 / 100

A condon consists of?

81 / 100

Chromosomal aberrations rotor to?

82 / 100

The highly condensed portion of th,,chromatin is called

83 / 100

RNA polymerase II synthesize (D.G.Khan 2015 Group II)

84 / 100

The enzyme which play a supporting role in DNA replication Is

85 / 100

Who did proposed the chromosomal theory of inheritance:

86 / 100

Math homogentislc acid with one of the followings:

87 / 100

The stop signal GC series of base pairs is the part of: (Sgd 2013)

88 / 100

Sickle cell anemia was discovered by

89 / 100

The structure formed by super coiling of DNA is

90 / 100

The synthesis of RNA from DNA is

91 / 100

After every 200 nucleotide, the DNA duplex is coiled around a cpre of eight histone proteins forming a complex known as: (Ltir 2013 G I)

92 / 100

Which one of the following is initiation codon:

93 / 100

The sequence of nucleotides that determines the aminoacid sequence of a protein is called (Rwp 2015)

94 / 100

Transcirption starts at

95 / 100

Okazaki fragments are synthesize by?

96 / 100

The strand which is transcribed during transcription is

97 / 100

Walther discovered chromosome in larva of:

98 / 100

Beadle and Tatum exposed Neurospora spores to: (Mirpur 14)

99 / 100

One of the given does not code for any aminoacid: (Bwp 2015)

100 / 100

Which one of the following represents the phospho diester linkage:

Your score is

The average score is 43%

0%

[mtouch quiz 155]

 




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