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55 Cards in this Set

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Organization of species

Kingdom, phylum, class, order, family, genus, species
Scientific process
Hypothesis, experiment, conclusion
Hydrogen bonding
strong cohesive and adhesive properties
Cohesion
ability of molecule to stay bonded or attracted to another molecule of same substance
Adhesion
ability of water to bond or attract other molecules or substances
Lattice
frozen water, causes molecules to spread
Carbohydrates
Long chains (polymers) of sugars. Functions= storage, structure and energy
Lipids
3 types: Fatty acids, phospholipids, and steroid
Fatty acids
Lipid. Either saturated fat or unsaturated fat
Saturated fat
Lipid(fatty acid) that has no double bonds, is solid at room temp, and causes health problems
Unsaturated fat
Lipid(fatty acid) that has one or more double bonds, liquid at room temp, and is healthier.
Phospholipids
Lipid that is two fatty acids bonded to a phosphate group. Important to combine to create a barrier in cell membrane
Steroid
Lipid that is a component of membranes and a precursor to hormones
Proteins
Contribute most to cell function. Largest molecule.
Amino acid
Protein. Polymers of 20 molecules.
Enzyme
Protein that catalyzes different reactions
Nucleic acids
DNA and RNA
DNA
code necessary for replication
RNA
used in transfer and messenger
Metabolism
all chemical reactions that occur in an organism
Metabolic pathways
reactions take place in a series of steps progressing from high energy to low
Prokaryote
Simple cell has no defined nucleus
Eukaryote
Complex cell. Has nucleus enclosed in membrane
Nucleus
Contains DNA (chromosomes)
Chromosomes
Contain material for regeneration of cell and instructions for function
Ribosomes
Reads RNA and translates genetic instructions to produce proteins
Endoplasmic reticulum
contains bound ribosomes
Cytoplasm
Has free ribosomes
Rough ER
Covered in ribosomes and is responsible for protein synthesis and membrane production
Smooth ER
No ribosomes, functions in detox and metabolism of multiple molecules
Golgi apparatus
Packaging, processing, and shipping organelle. Transports materials from ER throughout cell
Lysosomes
Intracellular digestion takes place. Hydrolyzes proteins, fats, sugars, and nucleic acids
Vacuoles
Usually during phagocytosis it uptakes food through a cell membrane. In plants it functions in storage, waste disposal, protection, and hydrolysis.
Mitochondria
Produce energy in eukaryotes and is a site of respiration
Chloroplasts
Found in plants to produce energy through photosynthesis
Cellular membrane
Protects, communication, and passage of substance in and out of the cell. Phospholipid bi layer creates hydrophobic and selectively permeable membrane
Cellular respiration
Produces more energy than fermentation. (32-36 ATP)
1st: Glycolysis
2nd:Krebs cycle
3rd: Electron transport chain
Glycolysis
First step of cellular respiration. Converts glucose to pyruvate. Produces 2 ATP
Krebs cycle
Second step of cellular respiration. Pyruvate is transported into a mitochondrion. Produces 2 ATP.
Electron transport chain
Third step of cellular respiration. Oxidizes NADH molecules to produce oxygen and water. Produces 28-32 ATP.
Photosynthesis
Reverse reaction of cellular respiration. Light energy is used to produce glucose.
1st: Light reaction
2nd: Calvin cycle
Light reaction
First step of photosynthesis. Converts solar energy to chemical energy to create NADPH and produce ATP.
Calvin cycle
Second step of photosynthesis. Uses ATP from light reaction to produce sugar (from carbon dioxide)
binary fission
Asexual reproduction. chromosome binds to plasma membrane and replicates. It grows, pinches in 2, and creates 2 identical cells.
Mitosis
Asexual reproduction. has 5 stages before cell pinches in two forming 2 seperate, identical cells.
1- Prophase
2- Prometaphase
3- Metaphase
4- anaphase
5- telophase
Sexual reproduction
2 cells contribute genetic material to the daughter cells, resulting in greater variation.
Meiosis
Sexual reproduction.
1- prophase I
2- metaphase I
3- anaphase I
4- telophase I
5- cytokinesis
Alleles
at least 2 alternatives to every gene.
Homozygous
same.
heterozygous
different
Genetic expression
Methods: Punnet square, multiple alleles, pleiotropy, epistasis, and polygenic inheritance
DNA
double helix contains 4 nitrogenous bases: adenine, thymine, guanine, and cytosine
Adenine
= thymine (or uracil in mRNA)
guanine
= cytosine
transcription
process which an RNA strand, complementary to original DNA strand is produced