शैडोइंग अभ्यास: Viruses: Components & Shapes - Microbiology Acellular Pre-Nursing, Pre-Med | @LevelUpRN - वीडियो के साथ अंग्रेजी बोलना सीखें

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Hi, I'm Kathy with Level Up RN.
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In this video, I'm going to begin my coverage of topics from the Acellular Infectious Agents section of our Microbiology Flashcard deck.
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Specifically, I'll be talking about viruses, including key characteristics of viruses, virus components, and virus shapes.
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I've included a quiz at the end of the video to test your knowledge on some of the key facts
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I'll be covering, so definitely stay tuned for that.
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And if you have our Level Up RN microbiology flashcards, go ahead and pull out your flashcards on viruses
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so you can follow along with me
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and pay close attention to the bold red text on the back of the cards
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because those are the things that you are likely to get tested on in your micro class.
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Viruses are acellular pathogens.
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This means that they are not composed of cells and do not contain cells.
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Viruses require a host cell in order to survive.
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They basically hijack the host cell's machinery to reproduce, synthesize viral proteins, and assemble virus components.
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This makes them obligate intracellular parasites.
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Viruses come in a variety of sizes, but in general, they are very small, usually between 20 and 900 nanometers in length.
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Each virus has a host range, which is the range of species and cell types that the virus can infect.
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So for example, a bacteriophage is a virus that only infects bacterial cells.
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They do not infect human cells.
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A virulent phage is a bacteriophage that infects a bacterial cell and causes the cell to lice or burst,
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which results in cell death.
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Whereas a temperate phage integrates its genetic material into the host cell's chromosome,
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and that genetic material is replicated when the host cell replicates.
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So in the next video, in this video playlist, we will go into detail about the different ways that a bacteriophage can replicate.
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Of note, when you see the term virion, that is referring to a virus particle that is outside the host cell.
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So it's basically the extracellular form of a virus that is capable of infecting a new host.
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Let's now talk about the different components that make up a virus.
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So each virus will contain genetic material.
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This may be DNA or RNA, but not both.
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And then in addition to the DNA or RNA, each virus will have a capsid,
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which is a protein coat that surrounds and protects the genetic material.
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The capsid is made up of capsimeres, which are protein subunits that interlock to form the capsid.
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Many viruses also have an envelope, which is a phospholipid membrane that surrounds the virus.
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This envelope is derived from the host cell when the virus pinches off from the host cell during a process called budding.
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A virus that lacks an envelope is referred to as a non -enveloped virus or a naked virus.
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Some viruses also have spikes, which are protein structures that extend outward and away from the virus.
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These spikes allow the virus to more effectively attach to the host cell, enter the cell, and cause infection.
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So viruses that have spikes tend to be more virulent.
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An example of a virus that has spikes is the coronavirus, which causes COVID -19.
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Now let's talk about key virus shapes, which include a helical shape, a polyhedral shape, and a complex shape.
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A virus with a helical shape has a cylindrical
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or rod -shaped capsid with the viral nucleic acid poiled up inside the capsid.
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An example of a virus with a helical shape is the tobacco mosaic virus.
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A virus with a polyhedral shape has a nucleic acid surrounded by a multi -sided capsid.
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An example of a virus with a polyhedral shape is the adenovirus.
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An icosahedron is a polyhedron with 20 equilateral triangular sides,
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which makes the virus appear spherical in shape.
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An example of a virus with an icosahedral shape is the poliovirus.
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And of note, helical viruses and polyhedral viruses may also have an envelope.
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Lastly, some viruses will have a complex shape, which includes features of both helical and polyhedral viruses.
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The most common example of a virus with a complex shape is a bacteriophage.
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So as you can see in the image, the head of the bacteriophage has a polyhedral shape,
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whereas the tail of the bacteriophage has a helical shape.
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All right, it's quiz time, and I have five questions for you.
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Question number one, what do you call the protein coat that surrounds and protects the nucleic acid of a virus?
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The answer is the capsid.
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Number two, what do you call the protein subunits that make up a capsid?
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The answer is capsomeres.
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Number three, what is a naked virus?
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The answer is a virus that lacks an envelope.
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Number four, what viral shape is shown here?
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The answer is helical.
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And number five, what do you call a complete virus particle outside the host cell?
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The answer is a virion.
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All right, that's it for this video.
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I hope you found it to be helpful.
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If so, be sure to hit that like button.
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Take care and good luck with studying!

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इस पाठ की शब्दावली और बोलने के सुझाव

यह स्पीकिंग पाठ वीडियो “Viruses: Components & Shapes - Microbiology Acellular Pre-Nursing, Pre-Med” पर आधारित है। सबसे ज़्यादा दोहराए गए शब्द ये हैं: virus, shape, cell, viruses, host। इस वीडियो में शैडोइंग के लिए 17 वाक्य और 891 शब्द हैं। बोला गया हिस्सा 6:43 लंबा है। वक्ता लगभग 133 शब्द प्रति मिनट की स्थिर गति से बोलता है, जो शैडोइंग के लिए आरामदायक है। केवल 69% शब्द अंग्रेज़ी के 3,000 सबसे आम शब्दों में से हैं, इसलिए शब्दावली कठिन है। इसके 17 वाक्यों में से 5 प्रश्न हैं, इसलिए यह प्रश्नों के लहजे और छोटे जवाबों के अभ्यास के लिए अच्छा है।

इस वीडियो की मुख्य शब्दावली

वीडियो के 15 सीखने लायक शब्द, उच्चारण और अर्थ के साथ:

शब्दउच्चारणअर्थ
virus संज्ञा/ˈvaɪ.ɹəs/विषाणु, वाइरस
envelope संज्ञा/ˈɛnvə(ˌ)loʊp/लिफ़ाफ़ा, लिफाफा
genetic विशेषण/d͡ʒəˈnɛt.ɪk/अनुवांशिक
spike संज्ञा/spaɪk/कीला
surround क्रिया/səˈɹaʊnd/घेरना
acid संज्ञा/ˈæsɪd/अम्ल, एसिड
replicate क्रिया/ˈɹɛplɪkeɪt/अनुकृति करना, अनुकरण करना
helpful विशेषण/ˈhɛlp.fl̩/मददगार
naked विशेषण/ˈneɪkɪd/नंगा, नग्न
coat संज्ञा/ˈkoʊ̯t/कोट
particle संज्ञा/ˈpɑɹtək(ə)l/कण, ज़र्रा
quiz संज्ञा/kwɪz/क्विज़, प्रश्नोत्तरी
bacterial विशेषण[bækˈtɪəɹiəɫ]जीवाण्विक
topic संज्ञा/ˈtɑpɪk/प्रसंग, विषय
nurse संज्ञा/nɝs/नर्स

वीडियो में आने वाली फ़्रेज़ल वर्ब

शब्दउच्चारणअर्थ
go ahead क्रिया/ˌɡoʊ əˈhɛd/आगे बढ़ना

इस वीडियो का व्याकरण

वक्ता जिन संरचनाओं का सबसे अधिक प्रयोग करता है, वीडियो के असली शब्दों के साथ:

संरचनावीडियो में
Passive voice be + past participle — ज़ोर इस पर कि क्या होता है, न कि कौन करता हैare not composed · is replicated · is made
Relative clauses who / which + उपवाक्य — व्यक्ति या वस्तु के बारे में अतिरिक्त जानकारीrange, which is · capsimeres, which are · envelope, which is

ध्यान देने योग्य उच्चारण

वक्ता 5 बार संक्षिप्त रूपों का प्रयोग करता है, जैसे I'll, I'm, I've। इन्हें वैसे ही छोटा बोलें जैसा आप सुनते हैं।

  • “th” की ध्वनियाँ: pathogen /ˈpæθəd͡ʒn̩/, synthesize /ˈsɪnθəsaɪz/
  • “sh” और “zh” की ध्वनियाँ: infection /ɪnˈfɛkʃən/, machinery /məˈʃiːnəɹi/, infectious /ɪnˈfɛk.ʃəs/, flashcard /ˈflæʃˌkɑɹd/
  • लंबे शब्द — बलाघात सही रखें: machinery /məˈʃiːnəɹi/, characteristic /ˌkæɹ(ə)ktəˈɹɪstɪk/, bacteriophage /bækˈtɪəɹ.ɪəʊˌfeɪd͡ʒ/, microbiology /ˌmʌɪkrə(ʊ)bʌɪˈɒlədʒi/, adenovirus /əˈdɛnəʊˌvaɪɹəs/

हिंदी भाषियों के लिए मुश्किल ध्वनियाँ:

  • /v/ और /w/ का फ़र्क़ — /v/ में ऊपर के दाँत निचले होंठ को छूते हैं, /w/ में होंठ गोल होते हैं: virus /ˈvaɪ.ɹəs/, envelope /ˈɛnvə(ˌ)loʊp/, viral /ˈvaɪɹəl/, whereas /(h)wɛɹˈæz/, quiz /kwɪz/
  • /z/ — इसे “ज” (/dʒ/) न बनाएँ: whereas /(h)wɛɹˈæz/, quiz /kwɪz/, mosaic /moʊˈzeɪ.ɪk/, compose /kəmˈpəʊz/, lyse /ˈlaɪz/
  • शब्द की शुरुआत में s + व्यंजन — पहले “इ” न जोड़ें: spike /spaɪk/, spherical /ˈsfɛɹɪkəl/

इस वीडियो से अभ्यास कैसे करें

  1. पहले बिना बोले पूरा वीडियो एक बार सुनें और जो शब्द नहीं आते उन्हें लिख लें।
  2. सामान्य गति पर एक-एक वाक्य की शैडोइंग करें और हर वाक्य तब तक दोहराएँ जब तक आपकी लय वक्ता से न मिल जाए।
  3. अपनी आवाज़ रिकॉर्ड करें और मूल से तुलना करें, ख़ासकर virus, envelope, genetic जैसे शब्दों पर ध्यान दें।

शैडोइंग तकनीक क्या है?

शैडोइंग (Shadowing) एक विज्ञान-समर्थित भाषा सीखने की तकनीक है जो मूल रूप से पेशेवर दुभाषिया प्रशिक्षण के लिए विकसित की गई थी। विधि सरल लेकिन शक्तिशाली है: आप मूल अंग्रेज़ी ऑडियो सुनते हैं और तुरंत इसे ज़ोर से दोहराते हैं — जैसे वक्ता की छाया 1-2 सेकंड की देरी से। शोध से पता चलता है कि यह उच्चारण सटीकता, स्वर, लय, जुड़ी हुई ध्वनियाँ, सुनने की समझ और बोलने की प्रवाहशीलता में काफ़ी सुधार करता है।

शैडोइंग तकनीक: पूरी चरण-दर-चरण गाइड पढ़ें →