ven the following scanning electron image, what general type of cell are we looking and why? 1.0 um a researcher, you were able to sequence a circular piece of DNA from the organism OW: 08363 w would you go about determining if the organism is a prokaryote or eukaryote?
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- Since DNA is a hydrophillicmoelcule, it cannot pass through cell membranes. Name and explain the technique with which the DNA is forced into (ii) a bacterial cell (ii) a plant cell (iii) an animal cell.Which of the following is the prokaryotic helicase? DnaB DnaD DnaA DnaCHow to write the methodology? I have a practical of HOMOGENIZATION AND FREEZE-DRYING, I need to do a lab report, but I don't know how to write the methodology. Here is the introduction: HomogenizationHomogenization is a process that involves breaking apart cells to release theircytoplasm and its contents. When the purpose is to extract organelles, it is frequentlydone in two steps; first, using a blender to break the tissue up, and then with anultrasonic or mechanical tissue disruptor. The organelles are then generally separatedusing differential centrifugation.Freeze-dryingFreeze-drying also known as lyophilization, and it is a dehydration process typicallyused to preserve perishable material or make the material more convenient fortransport. It works by freezing the material and then reducing the surrounding pressureto allow the frozen water in the material to sublimate directly from the solid phase tothe gas phase.
- 43) The major setback for the use of Transmission Electron Microscope is that: a) You can’t stain the sample with colored dyes b) You can’t see internal structures of the cell c) You can’t focus on Organelles inside the cell d) you can’t focus on cell membranes44) The major advantage of using the Scanning Electron Microscope (SEM) over the Transmission Electron Microscope (TEM) is that: a) You can use live material in looking through the SEM and not the TEM b) You can look at internal structures with SEM & not TEM c) You can use higher magnifications with SEM d) You can look at solid objects with SEM45) The image that you are observing in the SEM comes from: a) Direct reflection/bouncing of electrons from the specimen you are looking at b) Backscattered electros from the secondary electrons from the specimen c) A contrast between the texture of the specimen you are looking at d) A contrast between the acidophilic and basophilic components of the specimen you are looking at46) A…what is the phrase under DNA - "cellular life..." ?24. it consists of cellulose and glycoproteins that protect and provide structural support to the cella. cell membraneb. cell wallc. plastidd. nucleoplasm25. this part of the cell is described as a heterogeneous, colored plastid responsible for pigment synthesis in eukaryotic organisms.a. chloroplastsb. ribosomesc. golgi apparatusd. chromoplast
- 2)One strand of DNA reads: CGACTTCAGAT What would the complementary strand be?It is S phase of the cell cycle, and time to replicate the cell’s DNA. Using the following strand of DNA as a template, create the complementary strand: GCTCCTTACGGGCCCAATGACCTGAATGTACGAGATCCCATCCTT It is now time to make a protein. Using the same stand of DNA, transcribe it to mRNA, then translate to an amino acid sequence (use the codon table below).During transformation a cell usually incorporates only one or afew fragments of DNA. Explain.
- I answered the question with 'cell wall' only, but was only given half credit. After reading differences between prokaryotic and eukaryotic, I am not sure if one of these other options could also be selected (and if so, why?) Thank you for your help.. Which of the following characteristics of chloroplastsand/or mitochondria make them seem more similar tobacterial cells than to eukaryotic cells?a. Translation is sensitive to chloramphenicol anderythromycin.b. Alternate codons are used in mitochondria genes.c. Introns are present in organelle genes.d. DNA in organelles is not arranged innucleosomes.Which of the following statements is (are) true? (a) Bacterial ribosomes consist of 40S and 60S subunits. (b) Prokaryotic DNA is normally complexed with histones. (c) Prokaryotic DNA normally exists as a closed circle. (d) Circular DNA is supercoiled.