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Study Guide

[PSYC 2000] - Final Exam Guide - Comprehensive Notes for the exam (43 pages long!)


Department
Psychology
Course Code
PSYC 2000
Professor
stevengreening
Study Guide
Final

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LSU
PSYC 2000
FINAL EXAM
STUDY GUIDE

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Bio notes 9/26/2016
If something binds to the protein the protein changes in shape - reaction catalyzed
Change shape turns on or off
pancreas - digestive enzymes, chronic pancreatitis?
pH controls shape
Other proteins regulate getting rid of protein
Enzyme regulation
Regulate synthesis
Make them inactive; activate when needed:
Allosteric regulation
Competitive inhibition
Feedback inhibition
Substrate - enzymatically catalyzed steps - end product
If end product keeps building up, the end product can come back and inhibit
enzyme 1 to stop production
Allosteric regulation
Enzyme has active site which will fit a specific substrate into it
Allosteric regulator site has allosteric regulator molecule come bind to it and the
enzyme’s active site changes shape to block substrates from fitting into active
site - enzyme is now considered to be off
Negative allosteric regulation (because it turned enzyme off)
If it binds somewhere other than allosteric regulator site, it wont affect the
active site
Differently shaped substrate CAN fit into active site - for this reaction it is
labeled as positive allosteric regulation because a specific substrate can
fit.
Regulator does not bind to active site
Shape is important!
Can change DNA sequence to create different protein
Competitive inhibition
Something other than the substrate binds to the active site
Substrate cannot enter the active site- no product produced
Competition between substrate and inhibitor - compete for active site
Lots of substrate and less inhibitor means likely more reactions, however lots of
inhibitor with little substrate means less reactions.
Non-competitive inhibition = allosteric regulation (Negative!!!)
Drugs count as inhibitor
CELLULAR REPRODUCTION
Continuity of life
All cells come from preexisting cells
First cell - in nucleus - find 46 chromosomes = diploid (2n) 2 copies of
chromosomes
haploid (1n) which is sperm and egg
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Single copy of each chromosomes
Binary fission (bacteria and archaea)
One cell becomes two
Mitosis - Eukaryotes (NOT prokaryotes)
Cell division
Development; growth; maintenance; repair
Asexual reproduction - some eukaryotes
Meiosis
Sexual reproduction - making gametes (or sex cells -egg and sperm)
Start from diploid cells to form haploid sex cells
Halves amount of genetic material so that when fertilization happens to
create diploid cells
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