Fsc Part 2 Biology Online MCQs With Answer-Chapter 20 Chromosomes and DNA | ilmkidunya

Biology FSC Part 2 Chapter 20 Online MCQ's Test

Sr. #	Questions	Answers Choice
1	All the 64 codons were tested by	Marshall Nirenberg Philip Leader Har Gobind Khorana All a,b,and,c
2	In the double helix of DNA adenine forms two hydrogen bonds with	Thymine Guanine Cytosine Uracil
3	In prokaryote within promoter there are two binding sites TTGACA also called -35 sequence and TATAAT also called	-10 sequence - 20 sequence - 30 sequence - 35 sequence
4	In 1953 Watson and Crick proposed structure of the	RNA molecule ATP molecule DNA molecule NAD molecule
5	In 1944 Oswald Avery along with Colin Macleod and Maclyn McCarty repeated experiments of	Lamarck Griffith Darwin Spemann
6	Human cells have 46 chromosomes consisting of	20 pairs 21 pairs 22 pairs 23 pairs
7	Histones are positively charged due to an abundance of the basic amino acids	Arginine Lysine Both a & c Alanine
8	³²P and ³⁵S labeled viruses were used in his experiments by	Watson & Crick Hershey & Chase Wilkins & Franklin Correns & Bridge
9	Genetic code is a combination of 3 nucleotides in DNA which specify a particular	Amino acid Fatty acid Vitamin Steriod
10	Every 200 nucleotides the DNA duplex is coiled around a core of eight histone proteins forming a complex known as a	Histomone Nucleosome Peroxisome Glyoxisome
11	Each tRNA has a sequence of three bases called anticodon which is complementary to codon of	rRNA tRNA mRNA snRNA
12	DNA changes are called mutations and the organisms that have undergone such changes are called	Wild types Changer Mutants Transmutants
13	Adenine and guanine are called	Purines Pyrmidines Both a & b None of these
14	The number of nucleotides in the DNA of a typical human chromosome is about	10 Million 40 million 80 million 140 million
15	The number of chromosomes in frog is	52 26 13 7

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