Review Flashcards
Characteristics of a living organism
Metabolism, evolution, reproduction, development
Negative feedback
Reversal of a change
Ex homeostasis
Positive feedback
Amplifying cycle
Ex contractions during birth
Isotopes
Different in amount of neutrons
Protons stay the same
Isomers
Molecules with identical molecular formula, but different structural arrangement
High H+
More acidic, lower pH
Buffer
Keeps pH stable
Protein
Catalyze reaction acts like channels
Peptides
Name for the number of amino acids they contain
Oligopeptides
Between three and 15 amino acids
Polypeptides
Between 15 and 50 amino acids
Proteins (amino acids count)
Order 50 amino acid
Conformation (shape)
Unique, three dimensional shape of a protein
Denaturation
Extreme confirmational change that destroys function
Primary structure
Simple sequence of amino acids
Secondary structure
Coiled or folded shape
Tertiary structure
Further, bending and folding into various globular or fibroid shapes
Quaternary structure
Association of two more polypeptide protein chains
Integral transmembrane protein
Regenerate the memory and past due completely
Peripheral proteins
Adhere to one side of the membrane, usually tether to the cytoskeleton
Ligand gated channel
Respond to chemicals
Voltage gated channel
Response to charge differences
Mechanically regulated gates
response to stretch or pressure
Passive mechanism or transport that requires no ATP
Filtration, diffusion and osmosis
Active mechanism consume ATP?
Active transport, vascular transport, sodium potassium pump
Osmolality
Number of Osmoles (dissolved particles) per liters of the solution
Tonicity
How a solution effects a cells fluid volume and pressure
Hypotonic solution
Cell absorbs water and swell
Hypertonic solution
So loses water and shrivel
Uniport
Carries only one type of solute
Symport
Carries two or more solutes simultaneously in the same direction
Antiport
Carries 2 or more solutes in opposite directions
Nucleus
Store sell DNA
Mitochondria
Produces energy ( ATP)
Ribosomes
Responsible for protein synthesis
Golgi apparatus
Modifies, sorts, and packages proteins received from the ER into vesicles for transport
Golgi apparatus
Modifies, sorts, and packages proteins received from the ER into vesicles for transport
Lysosomes
Cell suicide
Peroxisome
Kills toxins consumed
Chromatin
Fine filamentous DNA material complexed with histone proteins
Histones
Proteins crucial for packaging DNA into the nucleus
Translation
mRNA codes for protein cytoplasm
RNA polymerase
Enzyme dies the DNA and opens the double helix reach bases from 1 trillion to DNA to build a complementary strain of DNA
Open read copy and paste
Pre-mRNA
Immature RNA produced by transcription
Exon
Codes for protein
Intron
Segments that must be removed before translation removed by splicing
Three parts of translation
Messenger RNA
Transfer RNA
Ribosomes
mRNA in translation
Contains codon the tRNA can read to add correct amino acids
tRNA in translation
Contains anticodon, complementary to the mRNA codon
Ribosomes in translation
Build a peptide chain
DNA replication 4 steps
Unwinding
Unzipping
Building
Repackaging
DNA damage response
Mechanism to correct replication errors
DNA damage response
Mechanism to correct replication errors
Mutations
Changes in DNA structure from incorrect replication errors
G1
Cells grows
Synthesis
Cell replicates
G2
Cell grows and repairs errors
Prophase
Genetic material condenses
Metaphase
Chromosomes align along the midline
Anaphase
Daughter chromosomes pull apart to opposite sides
Telophase
Nuclear envelope reforms chromosomes, uncoil to chromatin
Cytokinesis
Division of the cytoplasm
Cytokinesis
Division of the cytoplasm
Diploid
Any cell with 23 paired chromosome 46 total
Haploid
Contains 23 unpaired chromosomes