Mmsc490 - Study guides, Class notes & Summaries

Although E. coli DNA polymerase I is not a chromosomal DNA replicase, it participates in DNA replication. What is its function? a. synthesizes Okazaki fragments b. replaces RNA primer with DNA c. unwinds the double helix d. synthesizes an RNA primer e. connects 3' end of one okazaki fragment with the 5' end of another - Answer ️️ -b. replaces RNA primer with DNA In a replication fork, how do leading and lagging strands differ? a. lagging strand is subject to more error and require...

MMSC490 Exam 2 Questions with Complete Answers Which eukaryotic DNA polymerase replicates the lagging strand in the 3ʹ to 5ʹ direction? a. α b. γ c. δ d. None of the above; the lagging strand is replicated in the 5ʹ to 3ʹ direction. - Answer ️️ -d. None of the above; the lagging strand is replicated in the 5ʹ to 3ʹ direction. DNA polymerases can synthesize DNA: a. de novo, by catalyzing the polymerization of free dNTPs. b. by adding dNTPs to complementary dNTPs on a single-...

Which eukaryotic DNA polymerase replicates the lagging strand in the 3ʹ to 5ʹ direction? a. α b. γ c. δ d. None of the above; the lagging strand is replicated in the 5ʹ to 3ʹ direction. correct answers d. None of the above; the lagging strand is replicated in the 5ʹ to 3ʹ direction. DNA polymerases can synthesize DNA: a. de novo, by catalyzing the polymerization of free dNTPs. b. by adding dNTPs to complementary dNTPs on a single-stranded DNA. c. by adding dNTPs to a hyd...

The simplicity and clarity of Caenorhabditis elegans allowed researchers to - ️️Identify the genes in differentiation of each cell type The diffraction limited resolving power of a standard light microscope is approximately - ️️0.2 Om Chloroplasts are thought to have originated from endosymbiosis of ___ by large host cell. - ️️Photosynthetic eubacteria such as cyanobacteria The eukaryotic nucleus contains ___ DNA molecule (s). - ️️Multiple linear The source of the atm...

The Bcl-2 family of proteins is divided into three functional groups that contain and share as many as four Bcl-2 homology domains (BH domains). Which of the following is common to all members of the Bcl-2 family? a. BH1 b. BH2 c. BH3 d. BH4 - Answer- BH3 which of the following stem cells have the capacity to give rise to all the differentiated cell types of adult organisms? - Answer- embryonic stem cells Murine embryonic stem cells are grown in the presence of a growth factor. Wha...

The length of time it takes for the cells labeled during DNA synthesis to begin to enter mitosis is a good estimate of the length of the _______ phase(s). a. G1 b. S c. G2 d. M correct answers c. G2 In a typical cycling mammalian cell, _______ of the cell cycle is spent in interphase. a. 99% b. 95% c. 75% d. 50% correct answers b. 95% The number of cells in the different phases of a population can be determined most easily by using a(n) _______ to measure the amount of DNA per ce...

Mmsc490 Exam Questions with Complete Solutions The feature that most clearly distinguishes eukaryotes from prokaryotes is the presence of ......... in eukaryotic cells oxidative phosphorylation, ribosomes, a nucleus, RNA molecules - Answer-A nucleus Cytoplasmic organelles are *present in prokaryotic cells and absent in eukaryotic cells . *absent in prokaryotic cells and present in eukaryotic cells . *absent in both prokaryotic and eukaryotic cells . *present in both prokaryotic and euk...

cytoplasmic organelles are: a. absent in prokaryotic cells and present in eukaryotic cells. b. present in both prokaryotic and eukaryotic cells. c. present in prokaryotic cells and absent in eukaryotic cells. d. absent in both prokaryotic and eukaryotic cells. correct answers a. absent in prokaryotic cells and present in eukaryotic cells E. coli is a useful model system for molecular biology studies because: a. it has a small genome. b. it reproduces rapidly. c. mutants can easily be i...

The eukaryotic cell cycle is composed of four phases in the following order: a. G1; S; G2; M b. G1; G2; S; M c. G1; M; G2; S d. S; G1; G2; M correct answers A The length of time it takes for the cells labeled during DNA synthesis to begin to enter mitosis is a good estimate of the length of the _______ phase(s). a. G1 b. S c. G2 d. M correct answers C In a typical cycling mammalian cell, _______ of the cell cycle is spent in interphase. a. 99% b. 95% c. 75% d. 50% correct answe...

MMSC490 Questions Final chp.18 Exam Questions with Correct Answers The Bcl-2 family of proteins is divided into three functional groups that contain and share as many as four Bcl-2 homology domains (BH domains). Which of the following is common to all members of the Bcl-2 family? a. BH1 b. BH2 c. BH3 d. BH4 - Answer ️️ -BH3 which of the following stem cells have the capacity to give rise to all the differentiated cell types of adult organisms? - Answer ️️ -embryonic stem cells ...