Proscholar

The pioneering studies of gene regulation in E. coli were conducted in the 1950s by... correct answers Jacob and Monod E. Coli preferentially utilizes glucose for energy. However, in the absence of glucose, genes that can metabolize alternative sugars are activated. Low glucose... correct answers elevates cAMP through adenylyl cyclase that binds to and activates CAP to effectively increase transcription rates of genes that metabolize alternative sugars Which of the following statements abo...

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...

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 eukaryotic cell cycle is composed of four phases in the following order: S; G1; G2; M G1; S; G2; M G1; G2; S; M G1; M; G2; S correct answers G1; S; G2; M 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). G2 G1 M S correct answers G2 In a typical cycling mammalian cell, .............................. of the cell cycle is spent in interphase. 50% ...

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...

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...

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...

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...

FDA stands for correct answers Food and Drug Administration Affidavit of Licensure correct answers An original document or other approved means a verifying licensure history EPA is correct answers Environmental protection agency High-level disinfectant is correct answers chemical agent registering with the EPA that has demonstrated tuberculocidal activity Instruments are correct answers Equipment used during tattoo services An official transcript is correct answers An original doc...

Passing a oral and written examination given by the New York City Department of Health and Mental Hygiene correct answers Tattoo License is obtained by: 2 years from the date of issue correct answers Tattoo license is valid for a period of: Is not qualified for tattoo practice correct answers The person who passed the NYCDOH tattoo exam and is in process of license application. NYCDOH where complaints may be filed correct answers The person holding a tattoo license must post a sign in a...