DNA ligases cannot join the sticky ends of two DNA fragments. True False
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- The initial mechanism for repairing nucleotide errors in DNA is _____. a. mismatch repair b. DNA polymerase proofreading c. nucleotide excision repair d. thymine dimersDNA replication requires ________ . a. DNA polymerase c. primers b. nucleotides d. all are requiredEnergy that drives the attachment of a nucleotide to the end of a growing strand of DNA comes from ________. a. the nucleotide b. DNA polymerase c. phosphate-group transfers from ATP
- Match the terms appropriately. ___ nucleotide ___ clone a. nitrogen-containing base, sugar, phosphate groups ___ autosome b. copy of an organism ___ DNA polymerase c. does not determine sex ___ mutation d. injects DNA ___ bacteriophage e. replication enzyme ___ semiconservative replication f. can cause cancer g. something old, something new ___ DNA ligase h. seals gaps and breaksMake the complementary strand for the following DNA template and label both strands as 5 to 3 or 3 to 5 (P = phosphate in the diagram). Draw an arrow showing the direction of synthesis of the new strand. How many hydrogen bonds are in this double strand of DNA? template: PAGGCTCGOH new strand:n gel electrophoresis of DNA, the different bands in the final gel form because the DNA molecules _______. a. are from different organisms b. have different lengths c. have different nucleotide compositions d. have different genes
- DNA contains many hydrogen bonds. Are hydrogen bonds stronger or weaker than covalent bonds? What are the consequences of this difference in strength?true or false: DNA ligase seals nicks between DNA fragments by forming a new phosphate bond.Which of the following enzymes ensures that the correct base of a deoxynucleotide for growing the chain is aligned with template chain? DNA gyrases DNA ligases DNA polymerases primases
- dna stored at physiological ph is negative charge single strand positive charge unchanged degradedA single (+) strand of DNA (base composition: A, 21%; G, 29%; C, 29%; T, 21%) isreplicated by DNA polymerase to yield a complementary (−) strand. The resultingduplex DNA is then used a template by RNA polymerase, which transcribes the (−)strand. Indicate the base composition of the RNA formed.DNA size (in bp) at which Tss is equal to Tm is a) 10000 bp b) 100 bp c) 500 bp d) 1000 bp e) none of the above