Bio 93 Final questions with verified answers
3 layers of gastrulation Ans✓✓✓ ectoderm, mesoderm, and endo derm
Apictal Ectodermal Ridge Ans✓✓✓ Ectodermal structure that induces
proliferation to form into limb. Mesoderm underneath structure to
maintain AER by exchanging signals to promote limb development
cells default state? Ans✓✓✓ death
Difference between AER and ZPA? Ans✓✓✓ AER promote
proliferation of limb, ZPA establishes anterior posterior axis
DNA Ligase Ans✓✓✓ DNA Polymerase replaces the RNA primer with
DNA causes "nick"
Dna replication of Helicase? Ans✓✓✓ Breaks Hydrogen bonds
"unzips" strands
DNA replication of Primase? Ans✓✓✓ Adds RNA primer
DNA replication purpose of topoiomerase? Ans✓✓✓ Relieves stress
ahead of replication by cutting into backbone, untwisiting and reforming
bonds
, DNA replicatoin of Single-strand binding proteins Ans✓✓✓ Prevent
complementary strands from re-annealing
DNA synthesis on leading strand does NOT require DNA ligase T or F?
Ans✓✓✓ F, anytime there is RNA primer, DNA ligase needs to seal the
nick. Leading Strand requires RNA primer
Drug X inhibits activity of motor proteins. What stage of mitosis is this
most likely to effect? Ans✓✓✓ Anaphase
Ectoderm Ans✓✓✓ outerlayer of embryo i.e epidermis skin, nervous
and sensory system, pitutary gland, adrenal medulla, jaws and teeth,
germ cells
Endoderm Ans✓✓✓ inner layer of embryo, epithelial lining of
digestive tract and associated organs, epithelial lining of respiratory
execretory and reproductive tracts and ducts, thymus thyroid and
parathyroid glands
How are blastomeres made? Ans✓✓✓ Splitting of cytoplasm into many
smaller cells
How can distal control elements control gene expression? Ans✓✓✓
TF(A) bind to enhancer, recruit DNA bending protein, DNA is bent by
DNA BP, Enhancer are now close transcription iniation site, Recruit
general TF and mediator protein to regulate transcription
3 layers of gastrulation Ans✓✓✓ ectoderm, mesoderm, and endo derm
Apictal Ectodermal Ridge Ans✓✓✓ Ectodermal structure that induces
proliferation to form into limb. Mesoderm underneath structure to
maintain AER by exchanging signals to promote limb development
cells default state? Ans✓✓✓ death
Difference between AER and ZPA? Ans✓✓✓ AER promote
proliferation of limb, ZPA establishes anterior posterior axis
DNA Ligase Ans✓✓✓ DNA Polymerase replaces the RNA primer with
DNA causes "nick"
Dna replication of Helicase? Ans✓✓✓ Breaks Hydrogen bonds
"unzips" strands
DNA replication of Primase? Ans✓✓✓ Adds RNA primer
DNA replication purpose of topoiomerase? Ans✓✓✓ Relieves stress
ahead of replication by cutting into backbone, untwisiting and reforming
bonds
, DNA replicatoin of Single-strand binding proteins Ans✓✓✓ Prevent
complementary strands from re-annealing
DNA synthesis on leading strand does NOT require DNA ligase T or F?
Ans✓✓✓ F, anytime there is RNA primer, DNA ligase needs to seal the
nick. Leading Strand requires RNA primer
Drug X inhibits activity of motor proteins. What stage of mitosis is this
most likely to effect? Ans✓✓✓ Anaphase
Ectoderm Ans✓✓✓ outerlayer of embryo i.e epidermis skin, nervous
and sensory system, pitutary gland, adrenal medulla, jaws and teeth,
germ cells
Endoderm Ans✓✓✓ inner layer of embryo, epithelial lining of
digestive tract and associated organs, epithelial lining of respiratory
execretory and reproductive tracts and ducts, thymus thyroid and
parathyroid glands
How are blastomeres made? Ans✓✓✓ Splitting of cytoplasm into many
smaller cells
How can distal control elements control gene expression? Ans✓✓✓
TF(A) bind to enhancer, recruit DNA bending protein, DNA is bent by
DNA BP, Enhancer are now close transcription iniation site, Recruit
general TF and mediator protein to regulate transcription
