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MCB 2010 Test 2 (IRSC) EDITED Questions with 100% Actual correct answers | verified | latest update | Graded A+ | Already Passed | Complete Solution

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MCB 2010 Test 2 (IRSC) EDITED Questions with 100% Actual correct answers | verified | latest update | Graded A+ | Already Passed | Complete Solution

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  • June 19, 2024
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MCB 2010 Test 2 (IRSC) EDITED
Vertical gene transfer is the process of genes being passed down from parent to
offspring - ANS-True

When bacteria take up naked genetic material from the surrounding environment, this is
called - ANS-transformation

When one bacterium transfers a copy of its plasmid to another bacterium, this is called -
ANS-conjugation

Transformation. transduction. and conjugation are all examples of - ANS-horizontal
gene transfer

What is the name of the process of bacterial DNA being transferred from one bacterium
to another by a virus? - ANS-transduction

Which type of RNA includes the anticodon and brings the amino acids to the site of
protein synthesis? - ANS-tRNA

The three nucleotide group that codes for one amino acid is called a - ANS-codon

Fertility factor - ANS-carry instructions for conjugation pilus

Virulence plasmid - ANS-carry instructions for structures, enzymes, or toxins that enable
bacterium to become pathogenic

Bacteriocin factor- - ANS-carry genes for proteinaceous toxins called bacteriocins

resistance facor - ANS-carry resistance to one or more antimicrobial drugs or heavy
metals

nucleoside analogs - ANS-disrupt DNA and RNA replication and cause point mutations

nucleotide-altering chemicals - ANS-result in base-pair substitution mutations and
missense mutations

frameshift mutagens - ANS-result in nonsense mutations

, What are transposable elements? - ANS-The deletion of addition of nucleotides, which
may occur in the course of DNA replication

Subunits for the prokaryotic ribosome? - ANS-50S and 30S

Subunits for the eukaryotic ribosome? - ANS-60S and 40S

What are the components of an operon? - ANS-promoter and a series of genes

Which of the following is suitable for use on tissues for microbial control to prevent
infection? - ANS-antiseptic

Which of the following best describes a microbial protocol that inhibits the growth of
molds and yeast? - ANS-Fungistatic

What are some factors that alter the effectiveness of a disinfectant? - ANS-site to be
treated, environmental conditions, relative susceptibility of microorganisms

Which of the following terms is used to describe the time required to kill all of the
microbes within a sample at a given temperature? - ANS-Thermal death time

Which of the following microbial methods does not actually kill microbes or inhibit their
growth but instead removes them physically from samples? - ANS-filtration

In an autoclave, the application of pressure to ___________ is increased to allow the
steam to achieve temperatures above the boiling point of waiter - ANS-boiling water

Ionizing radiation can penetrate surfaces, but non-ionizing radiation cannot - ANS-False
(other way around)

Moist-heat sterilization protocols require the use of higher temperatures for longer
periods of time than dry-heat sterlization protocols do - ANS-False (other way around)

How does the addition of salt or sugar help preserve food? - ANS-Create hypertonic
environment that "sucks" the water out of bacterial cells and keeps food lasting longer

Which is more effective at killing microbes: autoclaving or freezing? - ANS-Autoclaving.
Freezing just slows down microbial growth

UV does not penetrate well - ANS-True

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