What is the enzymatic function of restriction enzymes? Group of answer choices a. to cut nucleic acids at specific sites b. to join nucleotides during transcription c. to add new nucleotides to the growing strand of DNA d. to repair breaks in sugar - phosphate backbones

If a restriction endonuclease recognizes and cleaves a linear piece of DNA and Circular DNA at 8 distinet places, how many pieces will result? OA Nine and Eight fragments respectively B. Both gerierate nine fragments C. Ten and nine fragments respectively Both generate eight fragments

Which type of mechanism best repairs thymidine dimers caused by exposure to UV light? a. Nucleotide excision repair b. Base excision repair c. Mismatch repair d. NHEJ

What will most likely be the effect of the change in the DNA molecule? *   A. the change will cause a harmful mutation   B. the DNA molecule will be unable to replicate   C. the organism will be reproduce   D. the DNA molecules will code for a different protein Original strand: T A C G T A T G A A G C, Mutant strand: T A G C T A T G A A G C. what type of mutation? *   A. Substitution   B. Deletion   C. Insertion   D. Nonsense Which mechanism contributes to accuracy during DNA Replication? *   A. The mismatch repair system recognizes an incorrect base-pair and corrects the mistake in the non-methylated strand   B. Using primers increase accuracy because the first nucleotides is a new nucleic acid chain are more like to be correct.   C. all DNA polymerase have a 5'-3' exonuclease activity which can remove…

A primer is laid down complementary to the DNA sequence TAGCAATCGCA to prime synthesis of a daughter strand. What will the sequence of the primer be? A. ATCGTTAGCGT B. ATGGTTAGGGT C. AUCGUUAGCGU D. AUCGTUAGCGT

Which of the following complex compound is used in the treatment of cancer?A. Cis platin B. Transplatin C. Potassium ferrocyanide D. Sodium cobal nitrite

Restriction maps illustrate the lengths of DNA fragments between restriction sites. Which of the following information can be gathered from the analysis of restriction maps? Select all that apply.   a gene sequence b presence of mutations c nucleotide sequence d disease identification

Which of the following cannot usually be inserted into a vector to form a recombinant DNA? A. PCR product of a eukaryotic coding sequence B. Lac operon operator region DNA sequence C. Reverse transcriptase gene D. E. coli

Certain restriction endonucleases produce cohesive (sticky) ends.  This means that they: a. stick tightly to the ends of the DNA they have cut. b. cut both DNA strands at the same base pair. c.   make a staggered double-strand cut, leaving ends with a few nucleotides of single-stranded DNA protruding.   d. cut in regions of high GC content, leaving ends that can form more hydrogen bonds than ends of high AT content. e. cut in regions of high AT content, leaving ends that can form more hydrogen bonds than ends of high GC content.

Some bacteria, through natural selection, have acquired some extremely potent enzymes that destroy viral DNA, thereby preventing the bacterial cell from becoming infected with the virus. These enzymes are called: Select one: O a. DNA polymerases O b. DNA ligases c. restriction endonucleases O d. restriction ligases