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Question:

BBS1005 SIP QUIZ PT 1

Response:

What does UBF binding signal in the context of nonsense mediated decay?

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The cutting site after alternative splicing 
Incorrect mRNA splicing and initiation of of degregation programming 
UPF is not involved in nonsense mediated decay

How are housekeeping proteins transcribed in a cell?

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Regulated 
Constitutively 

What type of signaling involves hormones ?

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Endocrine 
Synaptic 
Autocrine 
Paracrine 

Select the regulatory protein(s) which activate (s) transcription of the eve gene ?

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Hunchback 
Bicoid
Kruppel 
Giant 

What are the components of the gene expression regulating area on DNA?

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Promoter and trans regulatory sequences 
Terminator and cis regulatory sequencing 
Terminator and trans regulatory sequences 
Promoter and cis regulatory sequences 

To exert their function, transcription regulators have to interact with the DNA helix , to which part of the helix do they usually bind? 

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Major groove 
Minor groove 

Indicate if the following statement is true or false : Opérons are common in eukaryotes 

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True 
False 

A regulatory protein binds to a specific RNA sequence and blocks access of the splicing machinery to a splice junction , what type of regulation is alternative RNA splicing does this example illustrate ? 

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Positive regulation 
Negative regulation 

Select all the true statements regarding the 3" untranslated region of RNA 

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It represents a coding sequence 
3' extends from the 5' cap to the start codon 
It usually contains the signals responsible for the mRNA localization 
3' UTR extends from the stop codon to the start of the poly A tail 

Why is one of the hélices of the helix turn helix proteins called the recognition helix ?

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It binds to the minor groove of DNA 
It binds to the major groove of DNA 

How do the monomers of the leucine zipper proteins form a dimmer which is capable of binding DNA?

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Presence of covalent binds between monomers 
Presence of hydrophobic interactions 
Presence of hydrophillic interactions 

To what DNA sequences do general transcriptional factors bind?

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Promoter regions 
Cis regulatory sequences 

Which transcriptional regulator binds to the TATA box by the means of TBP to initiate transcription ?

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TF2B
TF2A
TF2D
TF2E

How can the binding of transcriptional regulators be stimulated ?

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DNA breathing 
Previous binding of the transcriptional regulators 
Transformation of the euro chromatine into hétérochromatin 

How can the level of activity of Cdk be described in the case of specific cyclin binding ?

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Partially active 
Fully active 

The precursors of which type of micro RNA are synthesized by RNA polymerase 2 ?

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miRNA 
both 
siRNA 

Which part of the RISC complex has the function to cut the targeted RNA molecule ?

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Other components 
miRNA 
Argonaute protein 
siRNA 

Which type of RNA is synthesized by cutting the precursor molecules by Dicer protein?

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siRNA 
miRNA
mRNA

Which protein transforms the primary miRNA to pre-miRNA?

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Exportin 5
Argonaute 
Drosha 
Dicer

What is the function of the Mdm2 protein?

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Activation of p53
Signaling DNA damage
Phosphorylation of p53
Inhibition of p53

What does the extra embryonic mesoderm form from?

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Heuser's membrane 
Hypoblast cells 
Cytotrophoblast cells 

Where do the cells which will form the defenitive yolk sac originate from?

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Hypoblast cells from the 2nd migration 
Epiblast cells 
Hypoblast cells from the first migration 

Which early embryonic tissue is the origin of the cardio genic area?

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Endoderm 
Splantic layer of mesoderm 
Somatic layer of mesoderm