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NWHSU Embryology Exam 1
Questions and Answers (100% Pass)
What is the leading cause of infant mortality?
✓ Birth defects
Can birth defects be prevented?
✓ You bet your ass they can
What is the most sensitive period of embryonic development when a birth
defect can happen
✓ Embryonic period
During what weeks does the embryonic period take place?
✓ 3-8 weeks
Why is the embryonic period most sensitive?
✓ During this time, the primordial of each organ system is already formed
What is the leading cause of mental retardation birth defects?
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✓ 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
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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
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When chromatin appears as beads of nucleosomes on a string of DNA, how is
it referred?
✓ Heterochromatin
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
Master01 | October, 2024/2025 | Latest update
NWHSU Embryology Exam 1
Questions and Answers (100% Pass)
What is the leading cause of infant mortality?
✓ Birth defects
Can birth defects be prevented?
✓ You bet your ass they can
What is the most sensitive period of embryonic development when a birth
defect can happen
✓ Embryonic period
During what weeks does the embryonic period take place?
✓ 3-8 weeks
Why is the embryonic period most sensitive?
✓ During this time, the primordial of each organ system is already formed
What is the leading cause of mental retardation birth defects?
Master01 | October, 2024/2025 | Latest update
, 1|Page | © copyright 2024/2025 | Grade A+
✓ 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
Master01 | October, 2024/2025 | Latest update
, 1|Page | © copyright 2024/2025 | Grade A+
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
Master01 | October, 2024/2025 | Latest update
, 1|Page | © copyright 2024/2025 | Grade A+
When chromatin appears as beads of nucleosomes on a string of DNA, how is
it referred?
✓ Heterochromatin
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
Master01 | October, 2024/2025 | Latest update
