IB Biology A1.2 (HL) Nucleic Acids MCQ

SPM.1A.HL.TZ0.3

Which property of DNA explains how genetic information can be replicated accurately?

• A.  Complementary base pairing

  
  

• B.  The double helical shape

  
  

• C.  5’ – 3’ bonding in the sugar-phosphate backbone

  
  

• D.  The ability of DNA to bind to histones

  
  

24M.1A.HL.TZ1.28

The sequence of bases on a short section of the antisense strand of a gene undergoing transcription is shown:

5′   CATG   3′

What is the sequence of bases on the resulting mRNA?

• A.  3^′   CATG   5^′

  
  

• B.  5^′   GUAC   3^′

  
  

• C.  3^′   GUAC   5^′

  
  

• C.  3^′   GUAC   5^′

  
  

24M.1A.HL.TZ2.27

• A

• B

• C

• D

22M.1A.HL.TZ2.26

What is the structure labelled T?

• A. 5' end of RNA

  
  

• A. 5' end of RNA

  
  

• C. N-terminal tail of one DNA strand

  
  

• D. N-terminal tail of one histone

  
  

21M.1A.HL.TZ2.26

• A

• B

• C

• D

19M.1A.HL.TZ2.11

• A. DNA was mainly outside the bacterial cells.

  
  

• B. Viruses infect bacterial cells with proteins.

  
  

• C. Viral DNA was found within the bacterial cells.

  
  

• D. Neither protein nor DNA were chemicals making up genes in viruses.