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MCB 3020 Lab Exam Questions and Answers
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  • MCB 3020

Unlike most enveloped viruses involve the host ______ membrane in the formation of their envelope - Answer-Nuclear The most common type of molecule found on the surface of animal viruses for interacting with host cell receptors is a(n) - Answer-Glycoprotein Which of the following does not use...

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  • October 9, 2024
  • 5
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • mcb 3020 lab exam questions and answers
  • unlike most enveloped viruses involve the host

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MCB 3020 Lab Exam Questions and
Answers
Unlike most enveloped viruses involve the host ______ membrane in the formation of
their envelope - Answer-Nuclear

The most common type of molecule found on the surface of animal viruses for
interacting with host cell receptors is a(n) - Answer-Glycoprotein

Which of the following does not use RNA as the genome? - Answer-Poxvirus

A _____ infection is one on which the virus quotes reproducing and remains dormant for
a period before becoming active again - Answer-Latent

Phage T4 protects its DNA from cleavage by host restriction enzymes by - Answer-
Substituting glucosylated hydroxymethylcytosine for cytosine

Lysogeny always requires integration of the viral genome into the host chromosome -
Answer-False

The protein required for the establishment and maintenance of lysogeny in cells infected
with the temperature bacteriophage lambda is the - Answer-Lambda repressor

The latent form of bacteriophage genome that exists when a phage establishes
lysogeny is called a - Answer-Prophage

Bacteriophage that only exhibit lyric replication cycles are called _____ phage - Answer-
Virulent

Which of the following is not a function of the replicative form of phage phiX174 -
Answer-Direct the synthesis of minus-stranded DNA

A group of viruses that cause severe diarrhea, resulting in over 600,000 deaths
worldwide annually is the - Answer-Rotavirus

In order for bacteriophage to be released from the host by a lysis mechanism, enzymes
are required that - Answer-Damage the cell wall and cytoplasmic membrane

Retroviruses have +ssRNA as their genome. In order to complete an infection, they
must first make a _____ molecule, which they use to direct the synthesis of mRNA -
Answer-DsDNA

Any organism that can cause disease in the host after direct interaction is a - Answer-
Primary pathogen

, Inanimate materials involved in pathogen transmissions are called vomited - Answer-
TRUE

Infection specifically refers to the multiplication of a pathogen on or within a host, and
includes the resulting tissue invasion and damage - Answer-True

Pathogenically islands are typically associated with - Answer-Genes encoding tRNA

Which of the following is used to help protect the lungs from infection - Answer-All of the
choices

Turbulent airfoil deposits airborne pathogens on sticky mucosal surfaces
the mucociliary escalator moves trapped organisms away from he lungs by ciliary action
Coughing and sneezing forcefully expel organisms away from the lungs

The skin surface (epidermis) is very favorable environment for colonization by
microorganisms - Answer-False

Cervical mucus has antibacterial activity - Answer-True

Pathogen associated patterns PAMPs include - Answer-Two of the choices

lipopolysaccharide

peptidoglycan

In the case of AB toxins, the function of the B subunit is to - Answer-Bind to host cell
receptor

Which of the following is not a way in which fever augments the host's defense> -
Answer-Inhibition of the parasite's growth by raising the temperature above the optimum
growth temperature

Cytokines - Answer-Play key roles in both specific and non-specific immunity and are
required fro regulation of the immune response

The alternative complement pathway plays an important role in - Answer-Innate
immunity

Dendritic cells - Answer-Are capable of recognizing specific pathogens-associated
patterns and play an important role in non-specific resistance

Which of the following releases histamine - Answer-Mast cells

basophiles

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