NWHSU Embryology Exam 1 Questions
And Answers
What is the leading cause of mental retardation birth defects? Alcohol use during
pregnancy
Preventing birth defects has to happen prior to conception T or F T
Embryonic development is directed by ____________ Genomes
What are genomes? They conta...
What is the leading cause of mental retardation birth defects? Alcohol use during
pregnancy
Preventing birth defects has to happen prior to conception T or F T
Embryonic development is directed by ____________ Genomes
What are genomes? They contain all of the information required to make an individual
Information encoded in the DNA are in the form of ____________ Genes
Approx. how many genes are in the human body? 23,000
Genes have various levels of regulation T or F T
, NWHSU Embryology Exam 1 Questions
And Answers
At the level of the gene what regulation happens in gene expression Gene transcription
regulation
At the level of RNA transcribed from a gene what regulation happens in gene expression?
RNA's are regulated if they will reach the cytoplasm and become messenger RNA's
At the level of mRNA's what regulation happens in gene expression? mRNA's may be
selectively translated
At the level of proteins made from mRNA's, what regulation happens in gene expression?
Proteins may be differentially modified
Chromatin is made of __________ and _____________ Complex of DNA and histones
If DNA is tightly coiled, what cannot happen? Transcription
When chromatin appears as beads of nucleosomes on a string of DNA, how is it referred?
Heterochromatin
, NWHSU Embryology Exam 1 Questions
And Answers
When euchromatin is present, DNA can be transscribed T or F T
The promoter region of a gene binds ____________ for initiation of transcription, contains the
__________ box RNA polymerase; TATA
_________ that contain DNA sequences will be transcribed and translated into proteins
Exons
What two sites designate the code for the first amino acid in a protein? Transcription and
translation initiation sites
The 3' untranslated region includes a ________addition site Poly A
What 3 things does the 3' untranslated region participate in? -Stabilizing mRNA
-Allows it to exit the nucleus
-Permits its translation into protein
, NWHSU Embryology Exam 1 Questions
And Answers
Where does the RNA polymerase II bind? Promoter region
In order for RNA polymerase II to bind, the polymerase requires additional proteins called
____________ Transcription factors
Transcription factors have a specific ____1______ binding domain and a ______2_______
domain. These ____3____ or ____4____ transcription of the gene after the binding of its
_____5___ or _____6_____ 1- DNA
2-transactivating
3-activate
4-inhibit
5-promotor
6-enhancer
Transcription factors active gene expression by causing the __________ complex to unwind.
Also by releasing the __________ so that it can transcribe the DNA template. Finally, preventing
the formation of new ___________ DNA nucleosome; polymerase; nucleosomes
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