WorksheetsPackaging of DNA,Search for genetic material-experiments
Total questions: 18
Worksheet time: 12mins
1. Who amongst the following scientists had no contribution in the development of the double helix model for the structure of DNA?
§ a. Rosalind Franklin
§ b. Maurice Wilkins
§ c. Erwin Chargaff
§ d. Meselson and Stahl
What is Chargaff rule?
C=G and T=A
C=T and G=A
T=G and C=A
All of the above.
Who used radioactive labeling to trace DNA and protien?
Franklin and Wilkins
Hershey and Chase
Crick and Franklin
Watson and Crick
Who studied S. Pneumoniae?
Franklin
Wilkins
Griffith
Watson
What happened when S.Pneumoniae and R. Pneumoniae were combined?
the mouse died
the mouse was alive
the mouse was happy
the dna mutated
To fit into a cell, DNA coils around a group of beadlike proteins …..
DNA
nucleosome
histones
chromatid
Who identified the molecule that transformed the R strain of S. Pneumoniae into S strain?
Wilkins
Avery
Franklin
Watson
Which scientist discovered that the bacteria Streptococcus pneumoniae changed its form?
Griffith
Avery
Chase
Hershey
A molecule that acts as a genetic material must fulfil the following traits, except
It should be structurally and chemically unstable
It should have the ability to generate its replica
It should facilitate slow changes necessary for evolution.
It should be able to express itself in the form of Mendelian characters.
Histones are
Positively charged and basic amino acids
Positively charged and acidic proteins
Negatively charged and basic proteins
Absent in bacteria
Name the amino acids which occur in abundance in histone protiens.
(a)
Length of Ecoli DNA is------------
106
(a)
Who Identified DNA and named it as ‘Nuclein’.
(a)
¤Ф 174 (a bacteriophage) has ---------nucleotides.
(a)
The pitch of the helix=
034nm
3.4nm
0.34nm
34nm
•The packaging of chromatin at higher level requires additional set of proteins called --------------
(a)
Name the protein which connects nucleosomes (a)
