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The light microscope was used to observe the cellular structure of cork by ____, who named the chambers "cells". correct answers Hooke Which fish is proving to be a useful model organism for the study of vertebrate development? correct answers Zebrafish Arabidopsis thaliana is a model organism for studying the molecular biology of correct answers Plants The original cell was thought to have arisen from the enclosure of self-replicating ____ by a phospholipid membrane correct answers R...

The simplest eukaryotic genome is found in correct answers Saccharomyces cerevisiae Potential protein-coding regions of genomic DNA containing long stretches of nucleotide sequences that can encode polypeptides and contain no stop codons are called correct answers open-reading frames Analysis of the first bacterial genome to be sequenced, H. influenzae revealed _____ rRNA genes, _______ different tRNA genes, and ______ potential protein-coding genes. correct answers 6, 54, 1743 The firs...

Which of the following does not contribute to the large variety of antigen-binding specificities found among the immunoglobulins? correct answers retrotransposons In addition to synthesizing DNA, DNA polymerase I has a second catalytic activity; it can correct answers remove RNA primers How many replication origins are there in the human genome? correct answers 30,000 DNA replication is correct answers semiconservative Which of the following statements is true of all known DNA polyme...

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 correct answers 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 DNA polymerase III a more suitable enzyme for c...

A dominant negative mutant is typically one that... correct answers produces a protein that interferes with the function of the protein produced by the normal gene RNA molecules that serve as templates for protein synthesis are called _ RNAs correct answers messenger Transgenic mice are usually produced by... correct answers injecting DNA containing the gene into the pronucleus of a fertilized egg Expression of a human protein in a bacterial cell is best done with human... correct answe...

According to the central dogma of molecular biology, transcription of genetic information occurs via... A) DNA-dependent RNA synthesis. B) RNA-dependent protein synthesis. C) RNA-dependent DNA synthesis. D) DNA-dependent DNA synthesis. correct answers A) DNA-dependent RNA synthesis In prokaryotes, σ factors are necessary for... A) low-affinity binding upstream for promoters. B) specific binding to certain promoters. C) All of the above. D) elongation of the RNA strand to its end. cor...

Cytoplasmic organelles are correct answers absent in prokaryotic cells and present in eukaryotic cells. E. coli is a useful model system for molecular biology studies because correct answers All of the above Arabidopsis thaliana is a model organism for studying the molecular biology of correct answers Plants The diffraction limited resolving power of a standard light microscope is approximately correct answers 0.2 micrometers A common use of green fluorescent protein (GFP) is to corr...

Which energy-producing process is thought to have come first during cellular evolution? correct answers Glycolysis The initial importance of a membrane enclosing self-replicating RNA molecules and associated proteins was that it correct answers maintained these molecules as a unit capable of reproduction and evolution. Mitochondria and chloroplasts resemble bacteria in that they correct answers have their own DNA, have their own ribosomes, reproduce by simple division into two. Which of...

The feature that most clearly separates eukaryotes from prokaryotes is the presence of _______ in eukaryotic cells. correct answers a nucleus The original cell was thought to have arisen from the enclosure of self-replicating _______ by a phospholipid membrane. correct answers RNA The source of the atmospheric oxygen necessary for the development of oxidative metabolism is thought to have been correct answers photosynthesis Chloroplasts are thought to have originated from endosymbio...

What is the primary reason that mammalian red blood cells are used in the study of the plasma membrane? a. There are a lot of them and they are easily obtained. b. They contain larger plasma membranes than any other cell type. c. They are of particular interest because they are made up of a lipid monolayer. d. They lack nuclei and membrane-bounded organelles. correct answers d. They lack nuclei and membrane-bounded organelles. Two examples of membrane lipids that are present in small am...

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...

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 diffraction limited resolving power of a standard light microscope is approximately? correct answers 0.2 micro meter Studies on which model experimental organism led to the initial discovery of important mechanisms controlling the development of the animal body plan? correct answers Drosophila melanogaster Because the genetic code usually has more than one codon for each amino acid, the code is said to be correct answers degenerate Vectors for expressing a eukaryotic protein in a ba...

Aminoacyl-tRNA syntheses are enzymes that.... correct answers attach amino acids to specific transfer RNAs Which of the following statements about introns is true? correct answers Some types of organisms generally do not have introns The primary function of factor EF-G is to... correct answers move the peptide-tRNA from the A site of the ribosome In bacteria, mRNAs are.... correct answers transcribed and translated simultaneously The combined sizes of prokaryotic and eukaryotic ribos...

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...

cell wall correct answers -organelle of bacteria and plants -rigid layer composed of carbohydrates and proteins -porous and easily penetrated plasma membrane correct answers -organelle of bacteria, plant and animal cells -bilayer of phospholipids and associated proteins -provides separation from inside of cell and external environment nucleoid correct answers -organelle of bacteria -contains 1 circular molecule of DNA -not surrounded by membrane ribosomes correct answers -organell...

World War II ID s (A GUARANTEED) Questions with 100% accurate answers Nazi Terms and Leaders (SOLVED!) Battle of Stalingrad (CORRECTLY ANSWERED) German Field Marshals (Questions with complete answers) WWII Key Terms & Names (Correctly solved!)

On what date did Pearl Harbor happen? correct answers December 7, 1941 How many people were killed in Peal Harbor ? correct answers 2,403 What ships (or type of ships) were out on patrol and not harmed? correct answers American air craft carriers Who proclaimed the date of the attack "a day which will live in infamy"? correct answers Roosevelt What was the name of the German Field Marshal in command in North Africa in 1942? correct answers Erwin Rommel What man forced that Field...

Adolf Hitler correct answers Dictator of Nazi Germany, supreme commander and commander-in-cheif fo the German Armed Forces. His refusal to heed the advice of his Generals was a large factor in the demise of German military fortunes. He committed suicide in his Berlin bunker in April 1945. Der Fuhrer correct answers (the leader) the title hitler gave himself when he came to power. Third Reich correct answers The name hitler picked to call his government once he became the dictator of German...

Time Magazine's "Man of the Year" for 1938 correct answers Adolf Hitler Nazi program for indoctrinating the children of Germany correct answers Hitler Jugend Fascist Leader of Spain correct answers Francisco Franco In March of 1939 Adolph Hitler broke his promise made at Munich and seized correct answers Czechoslovakia Leader of American Nazi Party correct answers Fritz Kuhn The Committee to Defend America First was led by correct answers Lindbergh August 24, 1939 was the da...