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DNA

1. Who introduced the term ‘Nucleic Acid?’ 
a) Meisher 
b) Robert Brown 
c) Lipmann 
d)  Altmann

2. Hereditary information is indicated by 
a) Sequence of nucleic acids 
b) Position of nucleic acid 
c) Number of nucleic acid 
d) All of these

3. The strongest evidence that DNA is the genetic material comes from 
a) The finding DNA is not present in the cytoplasm 
b) The fact that chromosome are made of DNA 
c) Studies of Bacterial transformation 
d) The knowledge that DNA is present in the nucleus

DNA model
4. Who among the following scientists developed cytochemical technique for the detection of DNA? 
a) Feulgen and Rossenbeck 
b) Watson and Crick 
c) Beadle and Tatum 
d) Knoll and Ruska

5. Which of the following scientists demonstrated that DNA A=T and G=C? 
a) Griffth 
b) Meselson and Stahl 
c) Hershey and Chase 
d) Chargaff

6. Which ratio is constant for DNA
a) A+G / T+C 
b) A + T / G+ C 
c) A+ C/ U+G 
d) A+ U/ C+G

7. The dye involved in Feulgen reaction to stain DNA is 
a) Janus green B 
b) Basic Fuchsin 
c) Neutral Red 
d) Haemoxylin


8. If 30% of an organism’s DNA is thymine, then 
a) 70% guanine 
b) 20% is guanine 
c) 30% adenine 
d) both b and c

9. Hydrogen bonds between cytosine and guanine arecytosine and guanine
a) 1 
b) 2 
c) 3 
d) 4

10. Nucleotide arrangement in DNA can be seen by 
x ray diffraction
a) Light microscope 
b) Electron microscope 
c) X-Ray crystallography 
d) Ultracentrifuge 

Answers

1.  d) Altmann

2. a) Sequence of nucleic acids

3. c) Studies of Bacterial transformation

4.  a) Feulgen and Rossenbeck

5. d) Chargaff

6. a) A+G / T+C

7.  b) Basic Fuchsin 

8. d) both b and c 

9. c) 3

10. c) X-Ray crystallography