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MCB3020 Exam 3 Questions With Correct Answers

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©THEBRIGHT EXAM STUDY SOLUTIONS 8/21/2024 8:36 PM MCB3020 Exam 3 Questions With Correct Answers Reverse transcriptase process - answer1. poly-T primer to single-strand RNA 2. reverse transcriptase to produce DNA-RNA hybrid 3. enzyme RNaseH to cut RNA and regenerate RNA primers 4, DNA polymer...

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  • August 28, 2024
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©THEBRIGHT EXAM STUDY SOLUTIONS 8/21/2024 8:36 PM




MCB3020 Exam 3 Questions With Correct
Answers


Reverse transcriptase process - answer✔✔1. poly-T primer to single-strand RNA
2. reverse transcriptase to produce DNA-RNA hybrid
3. enzyme RNaseH to cut RNA and regenerate RNA primers
4, DNA polymerase and ligase synthesizes new complementary DNA strand

cloning vector - answer✔✔allows for transfer of gene of interest to a host organism; allows for
the making of recombinant DNA

good cloning vector qualities - answer✔✔origin of replication
selectable marker (i.e. antibiotic resistance gene)
unique restriction sites that allow the insertion of gene of interest

types of cloning vectors - answer✔✔plasmid (carry 20k base pairs)
bacteriophage (carry 9k-25k base pairs)
cosmid (carry 30k-47k base pairs)
artificial chromosomes (carry up to 1 million base pairs)

PCR ingredients - answer✔✔primers
Taq polymerase
deoxyribonucleotide triphosphates

PCR temperatures - answer✔✔90 - separates DNA strands
50 - primers attach
70 - nucleotides are added on

types of polymers for gel electrophoresis - answer✔✔agrose

,©THEBRIGHT EXAM STUDY SOLUTIONS 8/21/2024 8:36 PM


polyacrylimide

ethidium bromide - answer✔✔stains DNA, makes it visible under UV

RFLP Analysis procedure - answer✔✔1. isolate gene of interest
2. PCR
3. cut DNA, making restriction fragments
4. gel electrophoresis to separate according to size
5. computers to analyze

ribotyping - answer✔✔compares rRNA to find similarities/differences across domains

southern blotting - answer✔✔1. cut DNA to make a lot of fragments
2. separate DNA by size via gel electrophoresis
3. place sheet of nitocellulose paper on top of gel
4. place paper in heat-sealed bag with radioactive probe
5. wash filter and place on x-ray film to make autoradiograph

western blotting - answer✔✔detects proteins

northern blotting - answer✔✔detects RNA

making of a genomic library - answer✔✔1. extract DNA
2. cut into fragments of specific size
3. insert the fragments into a vector
4. insert vector to host organism
5. DNA can now be amplified/retrieved

site-directed mutagenesis - answer✔✔1. identify sequence
2. complementary DNA sequence in lab with the mutation
3. insert the sequence into target cell
4. target cell swaps target sequence with complementary sequence with mutation

protoplast fustion - answer✔✔cells without cell walls are put together in solution, then shocked
electrically to fuse them all together

, ©THEBRIGHT EXAM STUDY SOLUTIONS 8/21/2024 8:36 PM


interferons - answer✔✔antiviral molecules
alpha, beta, gamma
treats viral infections

primary metabolite - answer✔✔essential for proper growth, its removal significantly impacts
survival

secondary metabolite - answer✔✔not directly involved in growth; its removal doesn't
significantly impact survival;
productions is usually triggered by exogenous events

agricultural applications of genetic manipulations - answer✔✔plant hormones
food additives
genetically modified plants
biopesticides

chemostat - answer✔✔bioreactor with a constant volume caused by a constant inflow of fresh
medium and output of culture liquid

industrial applications of genetic manipulations - answer✔✔biopolymers (gels)
biosurfactants
biofuels (ethanol, methane gas, hydrogen gas)
bioconversion
biosensors

biosurfactants - answer✔✔emulsify another substance;
useful in oil recovery, dispersing oil spills, and bioremediation

bioconversion - answer✔✔live organisms facilitate chemical rxns
i.e. microorganisms as biocatalysts; immobilized cells work better cuz they can be reused

biosensors - answer✔✔microorganisms, enzymes, or organelles detect the presence/absence of a
substance and converts products of the rxn to electrical currents

horizontal gene transfer - answer✔✔creates recombinant DNA
3 types: conjugation, transformation, transduction

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