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31 Cards in this Set

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  • Back
What are the levels of biological organization?
Atom
Molecules
Organelles
Cells
Tissue
Organism
Organ
Population
Community
Biosphere
What is the Scientific Method?
It enables us to answer questions by testing hypothesis.
What is Hypothesis?
A tentative testable explanation for an observed phenomena
What is Control?
Comparative condition in an experiment were no variables are introduced.
What is Homeostasis?
Stable internal Environment.
What is Evolution?
Gradual modifications of populations of living things over time.
What is the structure of an Atom?
Is made up of many smaller units including PROTONS(+), NEUTRONS, ELECTRONS (-)
What is Oxydation?
The LOSS of one or more electrons by an atom or molecule.
What is Reduction?
The GAIN of one or more electrons by an atom or molecule.
What is Ions?
An atom whose # of electrons differ from its # of protons
What is Active?
Movement of molecules or ions across the cell membrane that REQUIRES ENERGY & PROTEIN CHANNEL
What is Passive?
Movement of molecules or ions across the cell membrane that DOES NOT REQUIRE ENERGY
What 2 diffusions are included in passive?
Simple & facilitated
What is simple diffusion?
Diffusion through a cell that does not require a special protein channel
What is facilitated diffusion?
passage of materials trough the plasma membrane
What is the order of Mitosis cycle?
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
What are Enzymes?
A type of protein that accelerates a chemical reaction. They are also catalysts
What is Catalysist?
substances that retain their original chemical composition while bringing a change in substrate.
What is Catalist?
substance that speeds up the reaction.
What is the 1st stage of cellular respiration?
Glycolisis---- 2ATP
The second stage of C.R.?
Oxydation
What is the product of Glycolisis?
Pyruvate Acids
How many ATP's does Kreb Cycle have?
2 ATP
How many ATP's does Electron transport chain have?
32 ATP
What is mutation?
A permanent alteration in a DNA base sequence
DNA---> MRNA--->PROTEINS
what is the process of DNA to MRNA called?
Transcription
DNA---> MRNA--->PROTEINS
what is the process of MRNA to PROTEINS called?
Translation
What is Homozygous?
It is having 2 identical alleles of a gene for a given character.
What is Heterozygous?
It is having 2 different alleles of a gene for a given character.
What is Phenotype?
A physical function, bodily characteristics or action of an organism
What is Genotype?
The genetic makeup of an organism including all the genes that lie among it's chromosomes.