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QUESTION 1 You have a hybrid Exchange Server 2016 organization. Some of the mailboxes in the research department are hosted on-premises. Other mailboxes in the research department are stored in Microsoft Office 365. You need to search the mailboxes in the research department for email messages that contain a specific keyword in the message body. What should you do? A. From the Exchange Online Exchange admin center, search the delivery reports. B. Form the on-premises Exchange center, search the delivery reports. C. From the Exchange Online Exchange admin SY0-401 exam center, create a new In-Place eDiscovery & Hold. D. From the Office 365 Compliance Center, create a new Compliance Search. E. From the on-premises Exchange admin center, create a new In-Place eDiscovery & Hold. Correct Answer: E QUESTION 2 You have an Exchange Server 2016 organization. You plan to enable Federated Sharing. You need to create a DNS record to store the Application Identifier (AppID) of the domain for the federated trust. Which type of record should you create? A. A B. CNAME C. SRV D. TXT Correct Answer: D QUESTION 3 Your company has an Exchange Server 2016 200-310 exam Organization. The organization has a four- node database availability group (DAG) that spans two data centers. Each data center is configured as a separate Active Directory site. The data centers connect to each other by using a high-speed WAN link. Each data center connects directly to the Internet and has a scoped Send connector configured. The company's public DNS zone contains one MX record. You need to ensure that if an Internet link becomes unavailable in one data center, email messages destined to external recipients can 400-101 exam be routed through the other data center. What should you do? A. Create an MX record in the internal DNS zone B. B. Clear the Scoped Send Connector check box C. Create a Receive connector in each data center. D. Clear the Proxy through Client Access server check box Correct Answer: AQUESTION 4 Your network contains a single Active Directory forest. The forest contains two sites named Site1 and Site2. You have an Exchange Server 2016 organization. The organization contains two servers in each site. You have a database availability group (DAG) that spans both sites. The file share witness is in Site1. If a power failure occurs at Site1, you plan to mount the databases in Site2. When the power is restored in Site1, you Cisco CCNP Security 300-207 exam SITCS need to prevent the databases from mounting in Site1. What should you do? A. Disable AutoReseed for the DAG. B. Implement an alternate file share witness. C. Configure Datacenter Activation Coordination (DAC) mode. D. Force a rediscovery of the EX200 exam network when the power is restored. Correct Answer: C QUESTION 5 A new company has the following: Two offices that connect to each other by using a low-latency WAN link In each office, a data center that is configured as a separate subnet Five hundred users in each office You plan to deploy Exchange Server 2016 to the network. You need to recommend which Active Directory deployment to use to support the Exchange Server 2016 deployment What is the best recommendation to achieve the goal? A. Deploy two forests that each contains one site and one site link. Deploy two domain controllers to each forest. In each forest configure one domain controller as a global catalog server B. Deploy one forest that contains one site and one site link. Deploy four domain controllers. Configure all of the domain controllers as global catalog servers. C. Deploy one forest that contains two sites and two site links. Deploy two domain controllers to each site in each site, configure one domain controller as a global catalog server D. Deploy one forest that contains two sites and one site link. Deploy two domain controllers to each site. Configure both domain controllers as global catalog servers Correct Answer: C QUESTION 6 How is the IBM Content Template Catalog delivered for installation? A. as an EXE file B. as a ZIP file of XML files C. as a Web Appli cati on Archive file D. as a Portal Application Archive file Correct Answer: D QUESTION 7 Your company has a data center. The data center contains a server that has Exchange Server 2016 and the Mailbox server role installed. Outlook 300-101 exam anywhere clients connect to the Mailbox server by using thename outlook.contoso.com. The company plans to open a second data center and to provision a database availability group (DAG) that spans both data centers. You need to ensure that Outlook Anywhere clients can connect if one of the data centers becomes unavailable. What should you add to DNS? A. one A record B. two TXT records C. two SRV records D. one MX record Correct Answer: A QUESTION 8 You have an Exchange Server 2016 EX300 exam organization. The organization contains a database availability group (DAG). You need to identify the number of transaction logs that are in replay queue. Which cmdlet should you use? A. Test-ServiceHealth B. Test-ReplicationHealth C. Get-DatabaseAvailabilityGroup D. Get-MailboxDatabaseCopyStatus Correct Answer: D QUESTION 9 All users access their email by using Microsoft Outlook 2013 From Performance Monitor, you discover that the MSExchange Database\I/O Database Reads Average Latency counter displays values that are higher than normal You need to identify the impact of the high counter values on user connections in the Exchange Server organization. What are two client connections 400-051 exam that will meet performance? A. Outlook on the web B. IMAP4 clients C. mobile devices using Exchange ActiveSync D. Outlook in Cached Exchange ModeE. Outlook in Online Mode Correct Answer: CE QUESTION 10 You work for a company named Litware, Inc. that hosts all email in Exchange Online. A user named User1 sends an email message to an Pass CISCO 300-115 exam - test questions external user User 1 discovers that the email message is delayed for two hours before being delivered. The external user sends you the message header of the delayed message You need to identify which host in the message path is responsible for the delivery delay. What should you do? A. Review the contents of the protocol logs. B. Search the message tracking logs. C. Search the delivery reports 200-355 exam for the message D. Review the contents of the application log E. Input the message header to the Exchange Remote Connectivity Analyzer Correct Answer: E QUESTION 11 You have an Exchange Server 2016 organization. The organization contains three Mailbox servers. The servers are configured as shown in the following table You have distribution group named Group1. Group1 contains three members. The members are configured as shown in the following table. You discover that when User1 sends email messages to Group1, all of the messages are delivered to EX02 first. You need to identify why the email messages sent to Group1 are sent to EX02 instead. What should you identify? A. EX02 is configured as an expansion server. B. The arbitration mailbox is hosted 300-320 exam on EX02.C. Site2 has universal group membership caching enabled. D. Site2 is configured as a hub site. Correct Answer: A
Home / Biologia / Peroxissomos

Peroxissomos

O que são Peroxissomos?

PUBLICIDADE

As células eucarióticas, ou seja, aquelas células que contam com membrana nuclear individualizada, contam com organelas citoplasmáticas esféricas, as quais recebem o nome de Peroxissomos. Estas organelas, que estão presentes tanto em células animais, quanto vegetais, são envoltas por membranas com camada bilipídica e estão localizadas intracelularmente, conforme a função desempenhada por elas.

Função

Os peroxissomos têm como principal função o armazenamento de enzimas. Estas enzimas têm como propósito catalisar o peróxido de hidrogênio (H2O2) conhecido popularmente como água oxigenada, que é uma substância altamente tóxica para a célula e, portanto, é preciso ser degradada.

Assim, quando perguntam qual a principal função do peroxissomo, podemos ressaltar que esta organela conta com a capacidade de degradar compostos tóxicos para a célula. Após esta degradação, estes compostos são transformados em compostos menos tóxicos. Vale lembrar que os peroxissomos atuam também na desintoxicação do organismo, principalmente em órgãos como o fígado e rins e, em certos vegetais, eles atuam no processo de fotorrespiração, entre outras funções.

Os peroxissomos, que estão espalhadas pelo citoplasma, contam com no mínimo 50 tipos diferentes de enzimas, as quais estão relacionadas as mais diversas vias metabólicas. Mesmo sendo tão diversas, estas enzimas pertencem a duas classes enzimáticas: as oxidases e as catalases.

Peroxissomos

As oxidases são essenciais para processos de grande importância que ocorrem em nosso organismo. Como exemplo de um processo, podemos citar o metabolismo de lipídios. As enzimas oxidases fazem a catálise da reação de oxidação de substratos, envolvendo o oxigênio molecular (O₂) como o aceptor final de elétrons, com produção de água oxigenada (H₂O₂).

Por conta da ação das oxidases é que é possível haver um segundo tipo de reação enzimática, feita pelas catalases. As catalases são enzimas intracelulares, encontradas na maioria dos organismos, que decompõe o peróxido de hidrogênio. Assim, após a ação da oxidase, entra em ação a catalase. Desta forma, a água oxigenada é transformada em um produto que não é prejudicial à célula: em água.

Juliano Schiavo
Biólogo e mestre em Agricultura e Ambiente

Referências

PEGORARO, R. Peroxissomos. USP ICB. Disponível em: <lab-siviero.icb.usp.br/biocel/modulos/peroxissomos/>. Acesso em 29/06/17

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