quiz questions Flashcards

1
Q

what are antimicrobial peptides

A

peptides such as Microplusin which have enzymatic activity in order to combat bacteria

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2
Q

name of AMP used in the lab

A

microplusin

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3
Q

name of vector/ plasmid in which AMP is cloned

A

pRSET

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4
Q

expression of recombinant AMP will be induced by what molecular compound

A

IPTG

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5
Q

transformation

A

transfer of genetic material to cells, such as plasmids

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6
Q

what are competent cells?

A

competent cells are those that readily accept genetic material/ plasmids

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7
Q

type of E coli cells used to make transformation

A

E coli BL21

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8
Q

In order to express a gene that is controlled by the T7 promoter, you need to add IPTG to block the function of the lac repressor. T/F?

A

TRUE

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9
Q

How does electroporation work when transforming bacteria?

A

electroporation alters the charge on the cell wall, disrupting its permeability and causing it to form pores, so that the DNA can enter

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10
Q

Antimicrobial peptides are cationic or anionic?

A

cationic

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11
Q

IPTG is a molecular reagent that mimics the function of _______ to induce protein expression.

A

lactose

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12
Q

name of media to grow E coli cells

A

LB

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13
Q

T/F? IPTG triggers transcription of the lac repressor to induce recombinant protein expression.

A

FALSE

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14
Q

name of antibiotic used to grow E coli cells

A

LB-Amp

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15
Q

define lac operon

A

a cluster of genes under control of the same promoter, specifically for regulation of lac gene expression

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16
Q

for how long are we going to incubate the E coli cell culture after addition of IPTG?

A

4 hours

17
Q

Antimicrobial peptide was isolated from which organism?

A

Spider A. gomesiana

18
Q

what does SDS PAGE stand for

A

sodium dodecyl sulfate polyacrylamide gel electrophoresis

19
Q

SDS-PAGE is used to separate proteins according to?

A

size

20
Q

SDS is a detergent that dissolves _____ molecules.

A

hydrophobic

21
Q

after addition of SDS, the protein is denatured and acquires a _____ charge

A

negative (-)

22
Q

SDS-PAGE: proteins travel from ____ pole to _____ pole.

A

negative to positive

23
Q

what does IMAC stand for?

A

immobilized metal affinity chromatography

24
Q

mention one of the metal that has greatest affinity for histidine?

A

copper/ nickel

25
Q

how many histidines does our vector have at its tail

A

6