DNA replication

Which letter in the picture below depicts the leading strand in DNA replication?

• A

• C

• B

• None of the above

Which is the last step in DNA replication?

• Helicase unwinds the parent DNA strand

• Primase lays down an RNA primer for new nucleotides to be added to

• DNA polymerase builds new strands by bringing in new nucleotides

• Ligase joins together fragments on the lagging strand

Which of the following is correct with respect to DNA replication?

• Helicase stabilises ssDNA

• Ligase creates RNA primers

• DNA Pol I is the main polymerising enzyme

• The lagging strand is made up of Okazaki fragments

Which letter in the picture below depicts the lagging strand in DNA replication?

• Letter A since it is copied from 5' to 3'

• Letter A since it is copied from 3' to 5'

• Letter B since it is copied from 3' to 5

• Letter B since it is copied from 5' to 3'

Which letter in the picture below depicts the lagging strand in DNA replication?

• Letter A since it is copied from 5' to 3'

• Letter A since it is copied from 3' to 5'

• Letter B since it is copied from 3' to 5

• Letter B since it is copied from 5' to 3'

The DNA sequence of the parent strand is 5'-ATGCTCAGCT-3'. What is the sequence of the daughter strand?

• 5'-UACGAGUCGA-3'

• 5'-TACGAGTCGA-3'

• 3'-UACGAGUCGA-5'

• 3'-TACGAGTCGA-5'

Which of the following units are repeatedly joined together to form a strand of DNA?

• Amino Acids

• Nucleotides

• Fatty Acids

• Polysaccharides

Why does DNA replicate?

• To create a duplicate copy in case the original gets damaged

• New cells will have a copy of the DNA

• To create a new copy to replace the damaged original

Nitrogen bases are joined by which type of bond?

• polar bonds

• hydrogen bonds

• phosphate bonds

• deoxyribose bonds

Frameshift mutations result from -

• additions

• substitutions

• deletions

• all of these