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BIOL 121P

Test 2 Review

QuestionAnswer
Potential Energy energy stored due to position (stored in chemical bonds)
Kinetic Energy energy of motion
Adenosine Triphosphate the main energy molecule (3 phosphates, ribose, adenine)
Hydrolysis reaction where water breaks a chemical bond
Exergonic spontaneous, releases energy
Endergonic non-spontaneous, requires energy
Free Energy (G) the amount of energy available to do work
Negative ΔG is spontaneous
Positive ΔG is non-spontaneous
Calatysts substances that INCREASE the rate of a chemical reaction
Enzymes biological catalysts made of proteins
Regulatory Molecules controls when and where enzymes function
Competitive Inhibition a molecule competes with the substrate for the active site of an enzyme (is reversible)
Allosteric Regulation a molecule binds somewhere other than the active site (changes shape and activity of enzyme)
Metabolic Pathways a series of chemical reactions in a cell
Feedback Inhibition the final product of a pathway shuts down an earlier enzyme
Fitness an individual's ability to produce offspring
Directional Selection favors one extreme phenotype
Stabilizing Selection favors intermediate phenotypes
Disruptive Selection favors both extremes and removes middle
Allele Frequency the proportion of a specific allele in a population
Homologous Traits similar structures with the SAME evolutionary origin
Analogous Traits similar structures with DIFFERENT evolutionary origins
Convergent Evolution different species evolve similar traits independently
Divergent Evolution species evolve in different directions from a common ancestor
Ontogeny the development of an organism from embryo to adult
Blended Inheritance traits mix together from parents
Hybridization Studies experiments that breed organisms with different traits to study inheritance
Homozygous two identical alleles (RR or rr)
Homozygous Dominant BB
Homozygous REcessive bb
Heterozygous two different alleles (Rr)
Osigamy gametes are same size
Anisogamy gametes are different sizes
Sexual Dimorphism physical differences between males and females
Created by: user-1992551
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