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WorksheetsMolecular Basis of Inheritance 2
Total questions: 15
Worksheet time: 8mins
In E. colt, the lac operon gets switched on when
lactose is present and it binds to the repressor
repressor binds to operator
RNA polymerase binds to the operator
lactose is present and it binds to RNA polymerase.
In DNA strand, the nucleotides are linked together by
glycosidic bonds
phosphodiester bonds
peptide bonds
hydrogen bonds.
If a double stranded DNA has 20% of cytosine, what will be the percentage of adenine in it ?
20%
40%
30%
60%
If the sequence of bases in one strand of DNA is ATGCATGCA, what would be the sequence of bases on complementary strand ?
ATGCATGCA
AUGCAUGCA
TACTACGT
UACGUACGU
How far is each base pair from the next one in DNA double helix model ?
2 nm
3.4nm
34 nm
0.34 nm
Synthesis of DNA from RNA is explained by
central dogma reverse
reverse transcription
feminism
all of these.
Histone proteins are
basic, positively charged
basic, negatively charged
acidic, positively charged
acidic, negatively charged
The structure in chromatin seen as ‘beads-on string’ when viewed under electron microscope are called
nucleotides
nucleosides
histone octamer
nucleosomes.
Find out the wrong statement about heterochromatin,
It is densely packed
It stains dark.
It is transcriptionally active.
It is late replicating.
They year 2003 was celebrated as the 50th anniversary of discovery of
transposons by Barbare Me Clintock
structure of DNA by Watson and Crick
Mendel’s laws of inheritance
biotechnology by Kary Muliis.
The process of transofrmation is not affected by which of the following enzymes ?
A. DNase
B. RNase
C. Peptidase
D. Lipase
A, B
A, B, C, D
B, C, D
A, B, C
The three codons which result in the termination of polypeptide chain synthesis are
UAA, UAG, GUA
UAA, UAG, UGA
UAA, UGA, UUA
UGU,UAG,UGA
Amino acids which are specified by single codons are
phenylalanine and arginine
tryptophan and methionine
valine and proline
methionine and aroinine.
Which out of the following statements is incorrect ?
Genetic code is ambiguous.
Genetic code is deqenerate.
Genetic code is universal.
Genetic code is non-overlanning.
Some amino acids are coded by more than one codon, hence the genetic code is
overlapping
degenerate
wobbled
unambiguous.
