Restriction Endonucleases Quiz

What is the primary function of restriction endonucleases?

• To synthesize DNA

• To cleave DNA at specific sites

• To replicate RNA

• To bind proteins

How do endonucleases differ from exonucleases?

• Both cut DNA from the inside

• Endonucleases cut DNA from the inside, while exonucleases cut from the ends

• Both cut DNA from the ends

• Endonucleases cut DNA from the ends, while exonucleases cut from the inside

Why do bacteria use restriction endonucleases?

• To replicate their own DNA

• To protect against viral DNA

• To produce proteins

• To synthesize RNA

What is the role of modification methylases in bacteria?

• To bind to proteins

• To replicate viral RNA

• To add methyl groups to bacterial DNA

• To cleave viral DNA

What are palindromic sequences?

• Sequences that are only read backward

• Sequences that are only read forward

• Sequences that are random

• Sequences that read the same forward and backward

Which enzyme is associated with the palindromic sequence GAA TTC?

• HindIII

• BamH1

• Eco R1

• Alo1

What type of ends does a staggered cleavage produce?

• Circular ends

• Linear ends

• Sticky ends

• Blunt ends

What is the main difference between sticky ends and blunt ends?

• Neither have unpaired nucleotides

• Sticky ends have unpaired nucleotides, blunt ends do not

• Blunt ends have unpaired nucleotides, sticky ends do not

• Both have unpaired nucleotides

What is the significance of sticky ends in DNA manipulation?

• They degrade DNA

• They make DNA replication impossible

• They allow DNA fragments to easily bind with other fragments

• They prevent DNA from binding

Where can you find the sources of restriction endonucleases?

• In fungi

• In plants

• In animals

• In bacteria