BIO 235 Study guides, Class notes & Summaries

Helicase - Unwinds DNA in both directions Gyrase - topoisomerase that relieves supercoiling ahead of replication fork Single Stranded Binding proteins do what? - Stabilize single stranded DNA Primase - Enzyme that makes RNA primers DNA polymerase cannot? - Reconstruct the 5' end of a DNA strand this poses problems for linear chromosome integrity Telomeres - Repetitive DNA sequences TTAGGG -no protein coding -binds two types Two types of proteins that binds in telomeres - ...

1) The nucleotide sequence of the attenuator region in the leader of the trp mRNA - a) Contains features of a transcription termination site Depurination - the loss of a purine base from a nucleotide Deamination - the removal of an amino group from an organism, particularly from an amino acid attenuator region - region of RNA sequence that forms an alternate secondary structures that govern the level of transcription of attenuated operons. Transcription factors and other regulatory p...

Robert Koch - Father of microbiology, identified germ causing TB Louis Pasteur - discredited spontaneous generation, proposed Germ theory, "Microorganisms are responsible for infectious diseases Antoine von Leeuonhoek - created the first microscope; first to see microbes/bacteria Robert Hooke - coined the term "cell" Spontaneous Generation Theory - the theory that living organisms can rise from nonliving things binomial nomenclature - Classification system in which each species...

units of measurement - 1 µm = 10-6 m = 10-3 mm 1 nm = 10-9 m = 10-6 mm 1000 nm = 1 µm 0.001 µm = 1 nm total magnification (compound microscopes) - -the image from the objective lens is magnified again by the ocular lens -total magnification = objective lens x ocular lens resolution - -the ability of the lenses to distinguish two points. -shorter wavelengths of light provide greater resolution objective lens - lens closest to the specimen condenser - focuses light onto the s...

Venous blood returning from systemic circulation first enters the ___, proceeds to the ____, loses ___and gains ____ in the lungs, and then returns to the heart via the ____. a) right atrium, right ventricle, pulmonary artery, CO2, O2, pulmonary veins. b) Left atrium, left ventricle, pulmonary artery, CO2, O2, aorta c)Right atrium, right ventricle, pulmonary artery, O2, CO2, pulmonary veins d) Left atrium, right ventricle, pulmonary veins, O2, CO2, aorta - A. Right atrium, right ventricle,...

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