OAT- BIOLOGY EXAM QUESTIONS WITH GUARANTEED ACCURATE ANSWERS
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Course
OAT- BIOLOGY
Institution
OAT- BIOLOGY
OAT- BIOLOGY EXAM QUESTIONS
OAT- BIOLOGY EXAM QUESTIONS WITH GUARANTEED ACCURATE ANSWERS
Ingestion - ACCURATE ANSWERS Acquisition of food
Assimilation - ACCURATE ANSWERS Building of new tissues from digested food
Monosaccharide - ACCURATE ANSWERS single sugar subunit
- carb
Ex: gluco...
,Polysaccharide - ACCURATE ANSWERS✔✔ Polymer of sugar
subunits
-carb
- insoluble in water
- Ex: glycogen, cellulose, starch
Lipids - ACCURATE ANSWERS✔✔ 3 fatty acids bonded to glycerol
- chief means of food storage
-Major component of adipose tissue
-Steroids, waxes, carotenoids, poryphyrins
Proteins - ACCURATE ANSWERS✔✔ Polymers of amino acids joined
by peptide bonds
-Hormones (ACTH & Insulin), enzymes, structure proteins (collagen),
transport (hemoglobin), antibodies
Enzymes - ACCURATE ANSWERS✔✔ ↓ activation E and ↑ rate of rxn
- do NOT affect overall E
-↑ temp : ↑ enzyme action/ optimal pH= 7.2 (except pepsin and
pancreas)
Competitive Inhibitors (enzymes) - ACCURATE ANSWERS✔✔
Compete with substrate for binding at ACTIVE site
,- can be overcome by adding more substrate
-Vmax not affected
Noncompetitive Inhibitors (enzymes) - ACCURATE ANSWERS✔✔
bind at allosteric site
- diminishes Vmax
Eukaryotes - ACCURATE ANSWERS✔✔ Cell wall in fungi and plants
- Nucleus, and membrane bound organelles
Centrioles - ACCURATE ANSWERS✔✔ microtubules involved in
spindle organization during cell division
-NO membrane
-plants lack centrioles
Centromere - ACCURATE ANSWERS✔✔ Near middle of eukaryotic
chromosomes where spindle fibers attach
Lysosome - ACCURATE ANSWERS✔✔ Membrane bound
, -Involved in ingestion
-Hydrolytic enzymes
-has the ability to "commit suicide"
Mitochondria - ACCURATE ANSWERS✔✔ -generate energy
(oxidative phosphorylation → ATP)
-self-replicating organelles
-contain DNA in circular plasmids
Desmosomes - ACCURATE ANSWERS✔✔ "Spot welds"
-attach cells together and give cells mechanical strength
-Ex: skin
Tight junctions - ACCURATE ANSWERS✔✔ seal the spaces between
cells and prevent cell leakage
Ex: intestinal cells
Nucleus - ACCURATE ANSWERS✔✔ "information center"
-Contains chromosomes, DNA and RNA
-Separated by a double membrane nuclear envelope
Nucleolus - ACCURATE ANSWERS✔✔ Within the nucleus
-Ribosome synthesis takes place
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