Chromosome and DNA — Biology MCQs (Class 12)
Free chapter-wise Biology MCQs with answers for MDCAT, FSc and entry tests.
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#1 The total number of histone molecules in a nucleosome is ?
A) 4
B) 6
C) 8
D) 16
#2 The two turns of DNA on a nucleosome are sealed by a type of histone called
A) Histone I
B) Histone II
C) Histone III
D) Histone IV
#3 Chromosome with centromere located closer to one end is
A) Metacentric
B) Acrocentric
C) Telocentric
D) Sub-metacentric
#4 The linkage between two bases belonging to complementary pair is
A) Covalent bond
B) Ester linkage
C) Hydrogen bond
D) Ionic bond
#5 The linkage between two nucleotides in DNA is called
A) Hydrogen bond
B) Phosphodiester bond
C) Covalent bond
D) Dehydration synthesis
#6 Avery and his colleagues in 1944 found that extract of DNA from heat killed S type bacteria can transform
A) R type into virulent R type
B) S type into virulent R type
C) S type into non virulent R type
D) R type into virulent S type
#7 The synthesis of mRNA from a DNA template is known as
A) Transcription
B) Translation
C) Replication
D) Duplication
#8 Which one of the following is not true of a codon?
A) Consists of three nucleotides
B) Is the basic unit of genetic code
C) Never codes for more than one Amino acid
D) Is on the RNA
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