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Quiz 2 with Answer Key for Developmental Biology | BIO 5620, Quizzes of Developmental biology

Wayne State University (WSU)Developmental biology

Material Type: Quiz; Class: Developmental Bio-HON; Subject: Biological Sciences; University: Wayne State University; Term: Winter 2016;

Typology: Quizzes

2015/2016

Uploaded on 04/05/2016

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Quiz2
Name__________________________________ Date___________________
MULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.Questions
1-2areeachworth3.25points.Questions3-5areeachworth2points.(Total=12.5points)
1) TheillustrationontheleftshowstheexpressionpatternsofgenesA,BandC,whichareturnedon
inspecificcompartmentsofthesyncytialembryo.Theillustrationontherightshowsthe
concentrationgradientofmorphogenXthathappenstobeatranscriptionfactor.Amongthegiven
choices,deducethemostcorrectconclusionsinquestions1and2.
A) GeneAisonlytranscribedinthecompartmentthatisexposesdtothehighestconcentration
ofthemorphogen,becausegeneAʹspromoterhasrecognitionelementsthathavelow
affinityforthemorphogen
B) GeneBistranscribedinthecompartmentsshown,becausegeneBhasrecognitionelements
thathavehigheraffinityforthemorphogen,whencomparedtotherecognitionelements
foundingeneA
C) GeneCistranscribedinthecompartmentshown,becausegeneCʹsrecognitionelements
havethehighestaffinityforthemorphogen,whencomparedtotherecognitionelements
foundingenesAandB
D) AandBaretrue
E) AandCaretrue
F) BandCaretrue
G) Alloftheabove
1)
2) Whichofthefollowingstatement(s)mightbetruebasedontheillustrationsshownabovein
question1?
A) GeneBistranscribedinthecompartmentsshown,becausemorphogenXdirectlyinhibits
geneBexpression
B) GeneCistranscribedinthecompartmentshown,becausemorphogenXdirectlyinhibits
geneCexpression
C) Alloftheabove
D) Noneoftheabove
2)
1
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Download Quiz 2 with Answer Key for Developmental Biology | BIO 5620 and more Quizzes Developmental biology in PDF only on Docsity!

Quiz 2

Name__________________________________ Date___________________

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Questions 1 - 2 are each worth 3.25 points. Questions 3 - 5 are each worth 2 points. (Total = 12.5 points)

  1. The illustration on the left shows the expression patterns of genes A, B and C, which are turned on in specific compartments of the syncytial embryo. The illustration on the right shows the concentration gradient of morphogen X that happens to be a transcription factor. Among the given choices, deduce the most correct conclusions in questions 1 and 2.

A) Gene A is only transcribed in the compartment that is exposesd to the highest concentration of the morphogen, because gene Aʹs promoter has recognition elements that have low affinity for the morphogen

B) Gene B is transcribed in the compartments shown, because gene B has recognition elements that have higher affinity for the morphogen, when compared to the recognition elements found in gene A

C) Gene C is transcribed in the compartment shown, because gene Cʹs recognition elements have the highest affinity for the morphogen, when compared to the recognition elements found in genes A and B

D) A and B are true E) A and C are true F) B and C are true G) All of the above

  1. Which of the following statement(s) might be true based on the illustrations shown above in question 1? A) Gene B is transcribed in the compartments shown, because morphogen X directly inhibits gene B expression B) Gene C is transcribed in the compartment shown, because morphogen X directly inhibits gene C expression C) All of the above D) None of the above
  1. Autonomous specification is illustrated by: A) cell specification that is independent of any interaction with other cells B) cell specification that is dependent on signals from other cells C) the C. elegans two-cell stage D) Two of the above E) All of the above
  1. Anteroposterior axis specification in the Drosophila embryo: A) requires that any mRNA should be localized specifically either at the anterior end or the posterior end of the egg B) is not coordinated with the dorsoventral axis specification in the animal C) is initiated before fertilization D) Two of the above E) All of the above
  1. Which statement(s) below are true? A) During normal development, the stages of cell commitment are specification, determination and differentiation, where specification is reversible, but the last two stages are irreversible B) During normal development, the stages of cell commitment are specification, determination and differentiation, where the first two stages are reversible, but differentiation is irreversible C) During normal development, the stages of cell commitment are specification, determination and differentiation, where all stages are reversible D) During normal development, the stages of cell commitment are specification, determination and differentiation, where all stages are irreversible