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DAT Biology Test Solved with Complete Verified Answers
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DAT Biology Test Solved withComplete Verified Answers
Prophase - ✔✔- chromosomes condense
- centriole pairs separate and move to opposite
poles -spindle forms
- nuclear membrane dissolves
Metaphase - ✔✔- centriole pairs are at opposite poles
- fibers of spindle attach to chromatid and kinetochore
- spindle fibers align the chromosomes in the middle (METAPHASE PLATE)
Anaphase - ✔✔- centromeres split, each chromatid has own centromere- sister chromatids separate
- sister chromatids pulled to opposite poles- shortening spindle fibers
,Telophase - ✔✔- spindle apparatus disappears
- nuclear membrane forms
- each nucleus contains same number of chromosomes
- chromosomes uncoil
cytokinesis - ✔✔- cleavage furrow
Meosis I - ✔✔- produce two intermediate daughter cells
- N chromosomes and sister chromatids
Prophase I - ✔✔- chromatin condenses into chromosomes
- spindle forms
- nuclei and nuclear membrane disappear
-Homologous chromosomes come together- SYNAPSIS
- crossing over may occur
Metaphase I - ✔✔- homologous pairs (tetrads) align at metaphase
plate -each pair attaches to a separate spindle fiber at the kinetochore
Anaphase I - ✔✔- homologous pairs separate, pulled to opposite poles (disjunction)
- Random mixing of maternal and paternal origin - Medelian Law
Telophase I - ✔✔- nuclear membrane forms around each new
nucleus - sister chromatids still joined at centromere
Meiosis 2 - ✔✔- chromosomes align at equator, separate and move to opposite poles, surrounded
by new nuclear membrane
- new cells are haploid
, * in women, only one of these daughter cells becomes a functional gamete, other 2 or 3 destroyed by
body
Name the organelles involved and the role they play in:
INGESTION - ✔✔- cellular ingestion is a function of the cell membrane and vesicles.
- cell membrane- invaginates around a food particle and pinches off, enclosing the material in a vesicle
that cant ravel freely in the cytoplasm- ENDOCYTOSIS
Name the organelles involved and the role they play in:
DIGESTION - ✔✔- lysosomes, vesicles and mitochondria
- lysosomes- contains hydrolytic enzymes, it fuses with a vesicle alowing its enzymes to chemically
degrade the ingested material
- glucose is metabolized in mitochondria via aerobic respiration
Name the organelles involved and the role they play in:
TRANSPORT - ✔✔- ER- forms a long, interconnecting series of passageways through which
proteins are transported
- Smooth ER- secretes proteins into cytoplasmic vesicles that are transported to the Golgi
- microtubules are involved in the transport of proteins in some specialized cells (neurons)
Prokaryotes vs. Eukaryotes:
ORGANIZATION OF GENETIC MATERIAL - ✔✔- prokaryotes: genetic material is composed of a
single circular DNA localized in the nucleoid
- Eukaryotes: highly coiled linear strands of DNA organized into chromosomes within a membrane-
bound nucleus
Prokaryotes vs. Eukaryotes:
CELLULAR RESPIRATION - ✔✔-PROKARYOTES: occurs directly at the cellular membrane
-EUKARYOTES: Mitochondria
Prokaryotes vs. Eukaryotes:
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