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BTEC 3317 Exam Questions with Verified Solutions Latest Version

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BTEC 3302 Exam 3 Questions and Answers Already Passed What are the necessary requirements for high levels of transcription for the lac operon? High Lactose, low glucose, low cAMP Low Lactose, high glucose, high cAMP High Lactose, low glucose, high cAMP High Lactose, high glucose, low cAMP - Answers High Lactose, low glucose, high cAMP Which of the following statements is/are correct regarding the 10 promoter from bacteriophage T7? When IPTG is added, it inhibits the lac repressor In the absence of IPTG, the lac repressor represses the synthesis of T7 RNA polymerase All are correct The gene 10 promoter from bacteriophage T7 requires T7 RNA polymerase for transcription - Answers All are correct Which of the following statement(s) is/are INCORRECT regarding transcription regulation? I. The activators bind to DNA and increases transcription II. The repressors bind to DNA molecule and inhibit transcription III Negative control refers to transcriptional regulation by activator proteins IV. Positive control refers to transcriptional regulation by repressor proteins II only III & IV I, II, & III I & II - Answers III & IV Which of the following is NOT a way to regulate gene expression via changes in chromatin structure or DNA structure? Gene rearrangement Alternative splicing DNA methylation Chromatin compaction - Answers Alternative splicing DNA hemimethylation is the methylation of __________. None are correct Both stands of DNA One strand of DNA No methylation on either strand - Answers One strand of DNA What is the tac promoter in E. coli? - Answers Tac is a strong promotor constructed from the -10 region of the lac promoter and the -35 region of the trp promoter ____________________ are the two common regulatory transcription factors that enhance the transcription in eukaryotes. TFIIE and Rho proteins U1 and operator proteins TFIID and mediator proteins Operator proteins and enhancers - Answers TFIID and mediator proteins Heterodimers are formed by two different transcription factors. True False - Answers True Name the three structural genes present in the lac operon. What is the role of b-galactosidase? - Answers LacZ - encodes beta-galactosidase enzymatically cleaves lactose into galactose and glucose LacY LacA An activator protein binds to the ________________ region of DNA to promote transcription. Repressor Enhancer Silencer None are correct - Answers Enhancer Which of the following statements is INCORRECT regarding the CREB protein? Unphosphorylated CREB protein is required to activate RNA polymerase in extracellular signaling The CREB protein becomes activated in response to cell-signaling molecules that increase cAMP CREB stands for cAMP response element-binding The CREB protein recognizes the consensus sequence 5'-TGACGTCA-3' - Answers Unphosphorylated CREB protein is required to activate RNA polymerase in extracellular signaling A more widespread mechanism for RNA editing is the _______________ of bases. Deacetylation Deamination Demethylation Dephosphorylation - Answers Deamination What are SR proteins? Explain its role. - Answers SR proteins are splicing factor proteins which have domains that are rich in (S) serine and arginine(R). They have an RNA-binding domain at their N-terminal end. It is involved in protein-protein recognition which plays a key role in choosing splice sites What is the periplasm and explain its role? - Answers 6. Region between inner and outer E.coli membrane 1. No inclusion body formation by improved folding 2. Disulfide bridge formation by protein disulfide isomerase, disulfide oxidoreductase and disulfide isomerase What is codon optimization? - Answers a technique recently used by many scientists to improve the protein expression in living organism by increasing the translational efficiency of gene of interest Which of the following statements is correct about mRNA stability? None are correct Less adenosines in the poly-A-tail help protect against exonucleases and endonucleases A length of 10-30 adenosines long help mRNA stability The poly-A-tail is about 200 nucleotides long and protects mRNA stability - Answers The poly-A-tail is about 200 nucleotides long and protects mRNA stability Which of the following is NOT a way to regulate gene expression via RNA processing and translation?

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BTEC 3317 Exam Questions with Verified Solutions Latest Version 2024-2025

"Orphan drugs are pharmaceutical and biological products that target diseases affecting under 200,000
patients in the US. What is not an incentive given to manufacturers to encourage the development of
orphan drugs?" - Answers No other version of the drug will be approved during a twelve year market
exclusivity

What is not true of the inactive ingredients found in drug products? - Answers Inactive ingredients do
not affect the efficacy properties of a drug product

"FDA defines a drug as any substance used for diagnosis, control, mitigation, prevention or treatment of
disease. In drug regulation, the use of a drug for a particular disease or condition is referred to as its:" -
Answers Indication

"The FDA Safety and Innovation Act of 2012 gave FDA the authority to collect user fees from industry to
fund and speed up reviews of different types of drugs. In the Generic and Biosimilars UFA, the final user
fees are what percent of the typical user fees for a branded drug PDUFA?" - Answers 10%

"___________________ of a drug product is expressed as concentration of API (wt per vol, wt per wt, wt
per tablet) or in activity units (IU or international units). " - Answers Strength

Generic drugs have certain properties that should be the same as brand name drugs. What is not
expected to be the same in a generic and in a branded drug? - Answers Same label

Many biologics are manufactured using living cells. What is not a main concern of the process
development group of a biologics manufacturer? - Answers Developing the budget for clinical studies

What is true of biosimilars? - Answers Animal and human clinical studies on safety and efficacy are still
required of biosimilars

"From the Roche video, what is the first step in the drug development process?" - Answers Identifying a
molecular target for a candidate drug

What is not true of biologics? - Answers Biologics are not normally susceptible to microbial
contamination

Which department in a drug development company is responsible of filing patents with the US Patent
and Trademark office to protect the company's intellectual property or inventions? - Answers Legal
group

What is not a good reason as to why there may remain a market for a new drug even if there is already
an approved drug for a particular indication? - Answers A new drug that has to be taken once a week for
life is preferred over one that will need to be administered just twice in a lifetime

"For drug delivery routes, certain types of APIs enter the body subcutaneously through the skin, while
some goes through the tongue in which type of drug delivery?" - Answers Sublingual

, The FDA office that regulates pharmaceutical and some biologic drugs including antibodies and growth
factors is the: - Answers Center for Drug Evaluation and Research

Drug product refers to a finished dosage form. What is not considered a dosage form? - Answers Active
ingredient

What is not correct about the regulation of animal research under the Animal Welfare Act of 1966? -
Answers -The Animal Welfare Act requires the use of animals in all tests of candidate human drugs

The main goal of pre-clinical animal testing is to determine the ______________starting dose to use in
initial clinical trials for therapeutics in healthy human volunteers. - Answers Maximum safe starting dose

The OECD published a series of principles of Good Laboratory Practices and Compliance Monitoring.
What does not apply to the OECD and the GLP principles? - Answers The shared GLP principles are in
place to impose trade barriers for tested chemicals among member countries

Which is not true of Good Laboratory Practices? - Answers Started with deaths of test animals due to
excessive bleeding from warfarin

"According to the Roche video on target identification, there are at least 3 approaches to finding a
candidate drug target. What is not one of the three?" - Answers Identifying what enzyme is involved in
changing a drug to a less active chemmical derivative

FDA approval is not required prior to conducting pre-clinical animal research even if the candidate drug
will be submitted later to the FDA for marketing approval. - Answers TRUE

"Roche video. To achieve it's therapeutic effects, all drugs interact with their protein targets and inhibit
the proteins' functions." - Answers FALSE

"During pre-clinical research, a starting lead compound usually requires optimization of one or more of
its properties. What is not a property of a lead compound that researchers attempt to optimize?" -
Answers Increasing patient dependence on the drug

"As part of in vivo research, the Ames test is performed using bacteria to determine which property of a
candidate drug?" - Answers The ability of a drug to produce DNA lesions

What is not compliant with GLP requirements regarding facilities or operation of facilities used for
animal testing? - Answers Animals of different species should co-mingle in the same room

One type of pre-clinical research experiment is in vitro research involving mechanism of action (MOA)
studies. What does mechanism of action pertain to?



-cellular movement in response to a chemical

-the manner in which skeletal muscle contracts

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