Replication fork - Study guides, Class notes & Summaries

3 mechanisms of microevolution - natural selection, genetic drift, gene flow 3 modifications made during RNA processing - - adenines added to poly-A tail - 5' end recieves a guanine cap - RNA splicing 3 steps of DNA replication - initiation, elongation, termination active transport - movement of molecules across a plasma membrane against from low concentration to high concentration with the expenditure of energy (ATP) by the cell adhesion - An attraction between molecules of different su...

Biology 1406 exam 5 questions and answers already passed In 1928, __________ was surprised to find that when he killed pathogenic bacteria, then mixed the bacterial remains with living harmless bacteria, some living bacterial cells became pathogenic. Frederick Griffith In 1952, ___________ used bacteriophages to show that DNA is the genetic material of T2, a virus that infects the bacterium Escherichia coli (E. coli). Hershey-Chase __________ are viruses that infect bacterial c...

Biology Midterm 2 Study Guide Exam Questions With Verified Answers DNA replication The process in which DNA makes a duplicate copy of itself. (DNA Replication)DNA Polymerase Enzyme that catalyzes the elongation of new DNA at the replication fork by adding complementary nucleotides (DNA Replication)Topoisomerase Relieves tension at the end of the replication fork caused by DNA unwinding (DNA Replication)Helicase "Unzips" the DNA; unwinds the double helix at the replication fork (DNA ...

Griffith - transforming principle - streptococcus pneumonia - virulent strain has polysaccharide coat, have smooth coat (S) - R= rough, avirulent (lack coat) - some R could become S spontaneously Avery, MacLeod, McCarty - isolated transforming principle - destroyed different components, one at a time, to pinpoint which component was responsible for transforming DNA - found that DNA contained genetic material Hershey and Chase - T2 bacteriophage - radioactivity - protein ...

Technologist in Molecular Biology, MB(ASCP) board exam prep 2024 with Correct Answers Pyrimidine - -One carbon ring Cytosine, Thymine, Uracil Purine - -Two carbon rings Adenine, Guanine How are nucleotides joined together? - -Condensation to form phosphodiester bond What is the function of mRNA? - -Carries genetic info out of nucleus Transcript translated to protein What is the function of tRNA? - -Carries aa to ribosome Anticodon pairs with codon on mRNA strand What is the function o...

DNA Structure & Replication Final Exam. DNA Replication process by which DNA molecule is copied Chargaff's Law the base compostion of DNA varies between species and for each species, the percentages of A and T bases are roughly equal to the percentages of the G and C bases Double helix two twisted strands Antiparallel polynucleotide strands run in opposite directions 5' --> 3' 3' --> 5' Semiconservative Model the two strands of the parental molecule s...

Helicase - Unwinds DNA in both directions Gyrase - topoisomerase that relieves supercoiling ahead of replication fork Single Stranded Binding proteins do what? - Stabilize single stranded DNA Primase - Enzyme that makes RNA primers DNA polymerase cannot? - Reconstruct the 5' end of a DNA strand this poses problems for linear chromosome integrity Telomeres - Repetitive DNA sequences TTAGGG -no protein coding -binds two types Two types of proteins that binds in telomeres - ...

MMSC490 Exam 2 Questions with 100% Correct During E. coli DNA replication, all newly synthesized or nascent DNA fragments must have one of the following characteristics a. a 5' hydroxyl and 3' triphosphate b. a 5' triphosphate and 3' monophosphate c. 5' monophosphate and 3' hydroxyl d. 5' triphosphate and 3' hydroxyl - Answer ️️ -d. 5' triphosphate and 3' hydroxyl Among the 3 DNA polymerases in E. coli, DNA polymerases I and III differ in a number of properties that make DN...

BIO110 PRACTICE EXAM 4|165 Questions with Verified Answers TRNA has a few loops in its structure, what loops connects to the mRNA codon? a. codon domain b. anticodon c. acodon d. amino acid - CORRECT ANSWER b. anticodon Catabolite activator protein: a. increases the affinity of the promoter region for RNA polymerase b. decreases RNA polymerase activity c. becomes nonfunctional when it binds to AMP d. binds and activates RNA polymerase e. blocks RNA polymerase access to the DNA tem...

Biology Midterm 2 Study Guide Exam Questions With Verified Answers DNA replication The process in which DNA makes a duplicate copy of itself. (DNA Replication)DNA Polymerase Enzyme that catalyzes the elongation of new DNA at the replication fork by adding complementary nucleotides (DNA Replication)Topoisomerase Relieves tension at the end of the replication fork caused by DNA unwinding (DNA Replication)Helicase "Unzips" the DNA; unwinds the double helix at the replication fork (DNA ...