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Molecular Biology Objective Questions

Molecular biology objective questions below can help students evaluate their knowledge on molecular biology. Answers are also given for molecular biology MCQ with answers PDF download to help you remember. Try our molecular biology MCQ with answers PDF download to see if you can get all the answers right for the questions below.

Molecular Biology Objective Questions

Molecular Biology is the study of the composition, structure, and interactions of biological components such as nucleic acids and proteins is known as molecular biology. 

Molecular Biology MCQ with Answers PDF Download

1. LINES and SINES come under ———- DNA

  1. Single copy DNA        
  2. Moderatively repetitive DNA 
  3. Simple sequence DNA
  4. RNA

2. What is the difference between II S & II R strains of bacteria in Griffith’s experiment?         

  1. III S strain covers itself with a polysaccharide coat
  2. III S strain covers itself with a protein coat     
  3. II R strain covers itself with a protein coat      
  4. II R strain covers itself with a polysaccharide coat

3. Avery, Macleod and McCarty’s experiment was conducted in the year          

  1. 1928   
  2. 1974 
  3. 1964   
  4. 1938

4. To explore the genetic properties of DNA Hershey and Chase used   

  1. Bacteria          
  2. Bacterial Viruses
  3. Fungi  
  4. Dog

5. Conjugation was discovered by          

  1. Zinder and Ledenberg 
  2. Lederberg and Tatum 
  3. Frederick Griffith       
  4. Hershey and Chase

6. In conjugation the integration of F factor is mediated by        

  1. Transposon     
  2. Is Elements    
  3. Viruses           
  4. Simple Sequence DNA           

7. The DNA in the chromatin is very tightly associated with proteins called       

  1. Albumin         
  2. Globulin         
  3. Myosin           
  4. Histones

8. The molecular weight of histones is    

  1. Between 11,000 and 21,000  
  2. Between 1,000 and 11,000     
  3. Between 8,000 and 20,000     
  4. Between 1,000 and 31,000

9. Histones are very rich in         

  1. Acidic amino acids     
  2. Basic amino acids      
  3. Neutral amino acids    
  4. Aromatic amino acids 

10. Number of amino acids in H4 histones is

  1. 104     
  2. 108     
  3. 102
  4. 120

11. The bead of each nucleosome contains          

  1. Eight histone molecules  
  2. Ten histone molecules
  3. Two histone molecules           
  4. Nine histone molecules

12. The number of base pairs serves as linker DNA between nucleosome beads is          

  1. 200 bp
  2. 146bp 
  3. 54 bp  
  4. 45 bp

13. The spacing of the nucleosome beads provides a repeating unit typically of about    

  1. 200 bp
  2. 146bp 
  3. 54bp   
  4. 45bp

14. The total number of base pairs bound tightly around the eight-part histone core are  

  1. 200 bp
  2. 146 bp
  3. 54 bp  
  4. 45 bp

15. X-ray diffraction analysis of nucleosome reveals that it is a   

  1. Left-Handed Solenoidal Supercoil    
  2. Right-Handed Solenoidal Supercoil    
  3. Left Handed Double Helical Supercoil           
  4. Right Handed Double Helical Supercoil

Answers

  1. Moderatively repetitive DNA
  2. III S strain covers itself with a polysaccharide coat
  3. 1974
  4. Bacterial Viruses
  5. Lederberg and Tatum
  6. Is Elements
  7. Histones
  8. Between 11,000 and 21,000 
  9. Basic amino acids
  10. 102
  11. Eight histone molecules
  12. 54 bp
  13. 200 bp
  14. 146 bp
  15. Left-Handed Solenoidal Supercoil   

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